Fazer Owners Club - Unofficial
General => General => Topic started by: fazersharp on 22 June 2020, 12:34:39 pm
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I have been given a 20 year old Raligh prestige pioneer bike never used since brought, needs new tyres and tubes the size is 28x 15/8 x 13/8 (700 x 35c ) the valve is a presta.
I am looking for the cheapest tyres I can find but dont want to end up with total useless rubbish that constantly picks up punctures or somthing. When I look on Halfords for 700x35C tubes I get a shreader valve hit for that size but for a presta valve I get 38-45c. The valve in it at the moment is a presta so I am guessing that the wheel is too thin to fit a shreader ? And will the 38-45c fit.
It may help to explain the riding I will be doing, mainly hard cycle paths (tarmac ), canal tracks a little road.
Any help and advice appreciated.
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I went with Schwalbe Road cruisers Schwalbe SCH6029 Road Cruiser Tyre - Black, 700 x 35 C https://www.amazon.co.uk/dp/B000UJB46U/ref=cm_sw_r_cp_api_i_g3j8EbSXWY7V7 (https://www.amazon.co.uk/dp/B000UJB46U/ref=cm_sw_r_cp_api_i_g3j8EbSXWY7V7)
But note I paid £11.99 last year and the price on Amazon is a bit silly now. 700 tubes with presta valves. No punctures so far and I’ve probably done 500 miles +
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I bought those same tyres about 4 weeks ago from Halfords. They were £9.95 then, but they're listed at £12 now. Seem OK, but I've only done about 6 road miles since fitting them.
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Thanks both.
I can only find "land crusier" on Halfords at £12 and not Road Cruiser. Looking around I get the impression my size is not a common size ?.
And what about folding tyres - any pifalls in buying that sort,
Found this set on ebay https://www.ebay.co.uk/itm/Schwalbe-Road-Cruiser-700-x-40c-Black-Tyres-With-Or-Without-Tubes/333256258751?var=542269517339&hash=item4d979ef4bf:g:NzIAAOSwFsBdHSHE (https://www.ebay.co.uk/itm/Schwalbe-Road-Cruiser-700-x-40c-Black-Tyres-With-Or-Without-Tubes/333256258751?var=542269517339&hash=item4d979ef4bf:g:NzIAAOSwFsBdHSHE) buts says 700x40c - will they fit my rims as the OEM tyres are 700x35c
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Sorry my mistake, they were Land Cruisers that I bought for £9.95.
They were for an old hybrid type bike (part town bike/part mountain bike) so appropriate for that use. They're still less knobbly than the originals they replaced though.
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Should be fine. The 35/40 is the width and mine fit with plenty of space.
The road cruisers seem a good compromise between road and trail use and don’t make much noise like mountain bike tyres. With my old tyres I kept getting punctures but these have K-Guard which is meant to be a bit tougher.
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Here’s the tread on the road cruiser.
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just looked at the rims and it says alesa alloy 317-700c and also etro 622x17 whats all that mean. the tyres say 700x35c.
also 3 times now the gov has anounced the fix your bike £50 voucher comming in june but no one (google search ) seems to know anything about it. I see some chatter on proper full-on bike "fanitics forums with their £1000 bikes and they seem to think they can have one. Its not going to be for them is it - its for the likes of me to get your old bike from the shead back on the road - not for them to buy the latest bling for their £1000 bike.
But how is it going to be delivered so its claimed and used properly. ?
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also 3 times now the gov has anounced the fix your bike £50 voucher comming in june but no one (google search ) seems to know anything about it.
Probably gone the same way as, the laptops of under privileged kids and student nurses contracts to name but a few :rollin :rollin :rollin :rollin :rollin :rollin :rollin [size=78%] [/size]
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also 3 times now the gov has anounced the fix your bike £50 voucher comming in june but no one (google search ) seems to know anything about it.
Probably gone the same way as, the laptops of under privileged kids and student nurses contracts to name but a few :rollin :rollin :rollin :rollin :rollin :rollin :rollin [size=78%] [/size]
I will allow you that one but otherwise-- don't start with your shit on my thread.
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also 3 times now the gov has anounced the fix your bike £50 voucher comming in june but no one (google search ) seems to know anything about it.
Probably gone the same way as, the laptops of under privileged kids and student nurses contracts to name but a few :rollin :rollin :rollin :rollin :rollin :rollin :rollin
I will allow you that one but otherwise-- don't start with your shit on my thread.
Oh dear still touchy are we ;) don't ask silly questions then, it's obvious :pokefun :lol :lol :lol
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700 would be the approximate outer diameter of the tyre and 35 is the width.
The 622 is the actual bead diameter in mm, think of this as your 17" wheel.
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Actually just found this today ( think the gov was listening to me ) https://www.gov.uk/guidance/fix-your-bike-voucher-scheme-register-as-a-bike-repairer (https://www.gov.uk/guidance/fix-your-bike-voucher-scheme-register-as-a-bike-repairer)
Got a feeling that it wont be worth waiting just for two tyres and tubes because most of that £50 will be taken up with labour :rolleyes
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I took the tube out and it has on it 35/38/40-622 and 700x 35/38/40c
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I use Schwalbe tyres on my bicycle (Dawes Ultra racing bike) because they have a strip of "puncture proof" (or, at least, puncture resistant) material down the inside of the tyres.
So far, since putting them on a couple of years ago I haven't (yet, tempting fate!) had a puncture :thumbup
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I really only mentioned puncture through lack of thinking of anything else that may separate a very cheap tyre compared to a more expensive one.
I also have an 80s halfords fold up bike that I am getting back on the road 20 x 1 3/8
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I really only mentioned puncture through lack of thinking of anything else that may separate a very cheap tyre compared to a more expensive one.
I also have an 80s halfords fold up bike that I am getting back on the road 20 x 1 3/8
As it goes got a pair of tyres for the Mrs bike yesterday, cycle tyres sizes are a real faff are they not :rolleyes
This may be of help https://www.cyclinguk.org/cyclists-library/components/wheels-tyres/tyre-sizes (https://www.cyclinguk.org/cyclists-library/components/wheels-tyres/tyre-sizes) although it's not complete I couldn't find tyres I was looking for on it :rolleyes
This explains how all the different sizes work https://www.evanscycles.com/coffeestop/advice/beginners-guide-to-wheel-sizing-and-measurements (https://www.evanscycles.com/coffeestop/advice/beginners-guide-to-wheel-sizing-and-measurements)
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I really only mentioned puncture through lack of thinking of anything else that may separate a very cheap tyre compared to a more expensive one.
I also have an 80s halfords fold up bike that I am getting back on the road 20 x 1 3/8
As it goes got a pair of tyres for the Mrs bike yesterday, cycle tyres sizes are a real faff are they not :rolleyes
This may be of help https://www.cyclinguk.org/cyclists-library/components/wheels-tyres/tyre-sizes (https://www.cyclinguk.org/cyclists-library/components/wheels-tyres/tyre-sizes) although it's not complete I couldn't find tyres I was looking for on it :rolleyes
This explains how all the different sizes work https://www.evanscycles.com/coffeestop/advice/beginners-guide-to-wheel-sizing-and-measurements (https://www.evanscycles.com/coffeestop/advice/beginners-guide-to-wheel-sizing-and-measurements)
Thanks for the info. What I am realising is how much bike stuff costs these days :eek not brought any bits for about 15 years.
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Thanks for the info. What I am realising is how much bike stuff costs these days :eek not brought any bits for about 15 years.
It's bloody expensive, paid almost £45 for a pair of tyres :rolleyes
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Another question, the old gold up has a 3 speed sturmey archer hub gear and it has a cap so you can add oil, would car gear oil be ok as I already have that for living the :faz chain. Or would 3 in 1 oil be better.
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Mate I use oil engine oil on my chain have done for years :)
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Another question, the old gold up has a 3 speed sturmey archer hub gear and it has a cap so you can add oil, would car gear oil be ok as I already have that for living the :faz chain. Or would 3 in 1 oil be better.
Go with engine oil or 3in1. Car gear oil is REALLY thick.
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Mate I use oil engine oil on my chain have done for years :)
Yep we have had those big debates on here on other threads.
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Another question, the old gold up has a 3 speed sturmey archer hub gear and it has a cap so you can add oil, would car gear oil be ok as I already have that for living the :faz chain. Or would 3 in 1 oil be better.
Go with engine oil or 3in1. Car gear oil is REALLY thick.
Ok, but I dont think gear oil is all that thick actually, and then 3 in one is dead thin, might have some engine oil left over from my last bike change.
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+1 for the 3in1 oil. I used that for years on Sturmey Archer hub gears with no problems at all. Just the right viscosity I'd say and easy to apply through the lubricating orifice ( :lol ) with the can nozzle tip.
You're lucky it's the 3 speed hub and not the 5 speed. 3 speed was superb, but 5 speed best avoided imho.
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+1 for the 3in1 oil. I used that for years on Sturmey Archer hub gears with no problems at all. Just the right viscosity I'd say and easy to apply through the lubricating orifice ( :lol ) with the can nozzle tip.
You're lucky it's the 3 speed hub and not the 5 speed. 3 speed was superb, but 5 speed best avoided imho.
Yes its 3 - just like my old chopper, :)
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The old folding bike is almost done but now I have another bike to do. Its an apollo Abyis full suspension bike. I ave had it from new but not ridden it for years it needs a new tyres but on looking I see the back is 26x1.95 but the front is 26x2.10 ?? I must of fitted them but cant remember. So which is the correct tyre. The width of the rims is 26mm.
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The old folding bike is almost done but now I have another bike to do. Its an apollo Abyis full suspension bike. I ave had it from new but not ridden it for years it needs a new tyres but on looking I see the back is 26x1.95 but the front is 26x2.10 ?? I must of fitted them but cant remember. So which is the correct tyre. The width of the rims is 26mm.
Its quite normal for the front tyre on a mountain bike to be wider than the rear 👍
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The old folding bike is almost done but now I have another bike to do. Its an apollo Abyis full suspension bike. I ave had it from new but not ridden it for years it needs a new tyres but on looking I see the back is 26x1.95 but the front is 26x2.10 ?? I must of fitted them but cant remember. So which is the correct tyre. The width of the rims is 26mm.
Its quite normal for the front tyre on a mountain bike to be wider than the rear 👍
Oh I see. So there is no harm in me fitting a pair both 26x1.95. The ones on it now apart from being perished are really knobly and I wont be doing that kind of riding so been looking at the Schwalbe City Jet Classic Skin Tyres
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If you’re not doing too much off road, then the pair you mentioned will be fine. Most of my cycling is off road, so need the slightly bigger front footprint to stop the front from washing out so much.
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If you’re not doing too much off road, then the pair you mentioned will be fine. Most of my cycling is off road, so need the slightly bigger front footprint to stop the front from washing out so much.
Thanks. Without taking the tire off right now and looking if the front is 2.10 and it has a 2.10 tube - would a 1.95 tyre be ok on it.
Also what are peoples thoughts on the need to also change the inertubes purely down to age and the fact the bike has sat with flat tyres for a few years.
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I’d expect both of your tubes to be the same irrespective of the difference in tyre width front to back. The 1.95 on the front will be fine. Personally I’d fit new tubes as they’re cheap enough. When you fit the tyre(s) make sure the bead is seated properly. My 29er seems to take several inflate/deflate operations to get the tyre seated properly.
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I’d expect both of your tubes to be the same irrespective of the difference in tyre width front to back. The 1.95 on the front will be fine. Personally I’d fit new tubes as they’re cheap enough. When you fit the tyre(s) make sure the bead is seated properly. My 29er seems to take several inflate/deflate operations to get the tyre seated properly.
Thanks, yes I see now that tubes are sold with a measurement of 1.75 1.95 2.00 ( thought they were separate sizes and you pick the one you want :o )
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Ok the next one for you all, what's with these glueless patches, was going to buy a puncture kit in asda and it had glueless patches, didn't buy it cause I was scared of them :lol . Also is a £2 kit in asda going to be rubbish.
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I don’t bother repairing them any more and just carry a spare tube for the price of them.
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I don’t bother repairing them any more and just carry a spare tube for the price of them.
Hmmm there is that - but before long I will need the car for all the extra stuff. :lol
Are those glueless patches any good.
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I always use Rema Tip Top solution and patches. Never found anything better. Not cheap, but I sometimes find them at the car boot sale. Got a box of about 100 patches a while ago for a couple of quid. Bargain.
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I always use Rema Tip Top solution and patches. Never found anything better. Not cheap, but I sometimes find them at the car boot sale. Got a box of about 100 patches a while ago for a couple of quid. Bargain.
Hows this https://www.ebay.co.uk/itm/REMA-TIP-TOP-12-BICYCLE-MOUNTAIN-BIKE-TYRE-INNER-TUBE-PUNCTURE-REPAIR-KIT-GLUE/220965019778?epid=1888185801&hash=item33728aa082:g:-0wAAOSwr~lYpHCI&redirect=mobile (https://www.ebay.co.uk/itm/REMA-TIP-TOP-12-BICYCLE-MOUNTAIN-BIKE-TYRE-INNER-TUBE-PUNCTURE-REPAIR-KIT-GLUE/220965019778?epid=1888185801&hash=item33728aa082:g:-0wAAOSwr~lYpHCI&redirect=mobile)
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I don’t bother repairing them any more and just carry a spare tube for the price of them.
Hmmm there is that - but before long I will need the car for all the extra stuff. :lol
Are those glueless patches any good.
On that front I use one of these, brilliant for carrying a few little tools and a puncture repair kit. I also stick my keys (and occasionally a protein bar) in there too. Handy because its completely out of sight and out the way
https://www.ebay.co.uk/itm/353105872139 (https://www.ebay.co.uk/itm/353105872139)
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I don’t bother repairing them any more and just carry a spare tube for the price of them.
Hmmm there is that - but before long I will need the car for all the extra stuff. :lol
Are those glueless patches any good.
On that front I use one of these, brilliant for carrying a few little tools and a puncture repair kit. I also stick my keys (and occasionally a protein bar) in there too. Handy because its completely out of sight and out the way
https://www.ebay.co.uk/itm/353105872139 (https://www.ebay.co.uk/itm/353105872139)
yeh think I need one of those
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I don’t bother repairing them any more and just carry a spare tube for the price of them.
is there any reason why I should not buy a £3.25 tube from asda, £
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I don’t bother repairing them any more and just carry a spare tube for the price of them.
is there any reason why I should not buy a £3.25 tube from asda, £
From my experience:
Even the cheapest "Chinese" tubes do the job.
However, Schwalbe tubes seem to hold air best of all - that is, require the least frequent topping up (pumping up).
They also have good quality rubber, so even after 5, or 10 years, they are still OK and can be patched when punctured (Rema Tip-Top is by far the best for this).
Expensive? Yes - around double the price of the Chinese, if not higher. But 3 tubes last around 10 years, or longer. I just put the spare one into the tyre, and patch the punctured one, delegating it to being a spare tube. :)
A thing I really don't like is when a tube has rubber valve stem. It can get cut on the rim sometimes, and it's more difficult to hold in place when inflating a flat tyre (no steel nut that holds the valve from dropping through the valve hole).
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Thanks for the tube help tips. Think I will do the same with the spares. And thanks to yamfazfan I have got myself a tip top kit this one https://www.ebay.co.uk/itm/REMA-TIP-TOP-TYRE-INNER-TUBE-PUNCTURE-REPAIR-KIT-TT02-BICYCLE-MOUNTAIN-BIKE-NEW/222106267047?hash=item33b690ada7:g:yaUAAOSwnHZYcOJ7 (https://www.ebay.co.uk/itm/REMA-TIP-TOP-TYRE-INNER-TUBE-PUNCTURE-REPAIR-KIT-TT02-BICYCLE-MOUNTAIN-BIKE-NEW/222106267047?hash=item33b690ada7:g:yaUAAOSwnHZYcOJ7)
I was expecting it to come loose in a bag but it came in a little green plastic box nice and small. And it came within 24 hours - first time since lockdown any post has arrived in a timely manner.
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I generally just pick a few tubes up from decathlon but always go for presta valves with metal stems as mentioned. I’ve got a cheap track pump from Aldi which works well.
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Thanks trebus. Brings me nicely to my next questions, bike pumps. I have one that fits nicely on my vintage fold up bike using a bottom spike and wedging the springy handle in the top frame.
The thread in the pump is plastic and about knackered, could do with one with a metal thread.
I see mini pumps and all kinds. But need to be able to pump shredder and woods valve, I already have the adapters.
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I take a mini 2 shot pump, which pumps on both strokes, or sparklets and a dispenser. I usually wear a rucksack with my spare tube and cable lock in it, so taking loose stuff isn't a problem.
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Ok something else. My vintage fold up bike should have white wall tyres but I either did not want to pay or couldn't find any. Now I have fitted new black ones I would quite like white wall, anyone know of or used rubber paint that I could use.
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You certainly could buy whitewall rubber paint in years gone buy. I remember doing the tyres on my Mk2 lowline Zodiac, but that was back in 1968. It looked a right tart’s handbag though :lol .
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You certainly could buy whitewall rubber paint in years gone buy. I remember doing the tyres on my Mk2 lowline Zodiac, but that was back in 1968. It looked a right tart’s handbag though :lol .
I will do a bit of googling its about 15mm deep on a 20inch tyre. I have come across pens via google that seem to work but only good enough to spam up lettering before they run out.
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Ok something else. My vintage fold up bike should have white wall tyres but I either did not want to pay or couldn't find any. Now I have fitted new black ones I would quite like white wall, anyone know of or used rubber paint that I could use.
You could do.... just make sure they don't look as bad as these ones i spotted at my local bike meet 😳🤣
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:rollin :rollin That looks like emulsion paint put on with a roller.
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I have found some Michelin Country Rock MTB Tyre for my mountain (full suspension bike ) but they are 26x 1.75. My tyres on the bike are 1.95 and 2.10 - will the 1.75 fit.These https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547 (https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547) very cheap but seem just right for the riding I will be doing.
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I have found some Michelin Country Rock MTB Tyre for my mountain (full suspension bike ) but they are 26x 1.75. My tyres on the bike are 1.95 and 2.10 - will the 1.75 fit.These https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547 (https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547) very cheap but seem just right for the riding I will be doing.
I would expect it to fit. A rather conservative chart of which tyres fit which rim width (1.75" is 47 mm when it comes to tyre sizing standards):
https://bike.bikegremlin.com/285/bicycle-tyre-dimensions/#2 (https://bike.bikegremlin.com/285/bicycle-tyre-dimensions/#2)
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I have found some Michelin Country Rock MTB Tyre for my mountain (full suspension bike ) but they are 26x 1.75. My tyres on the bike are 1.95 and 2.10 - will the 1.75 fit.These https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547 (https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547) very cheap but seem just right for the riding I will be doing.
I would expect it to fit. A rather conservative chart of which tyres fit which rim width (1.75" is 47 mm when it comes to tyre sizing standards):
https://bike.bikegremlin.com/285/bicycle-tyre-dimensions/#2 (https://bike.bikegremlin.com/285/bicycle-tyre-dimensions/#2)
I have just twigged your avatar.
Your site was very helpful, I have come across a few similar about sizing and widths but seem to confuse more than help, nowhere could I find that definitely told me that 47 was 1.75 especially when 1.50 is not 1 1/2.
My inside rim is 19.40 so I am good to get the 1.75s which are on order - so thank you for your help.
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I have found some Michelin Country Rock MTB Tyre for my mountain (full suspension bike ) but they are 26x 1.75. My tyres on the bike are 1.95 and 2.10 - will the 1.75 fit.These https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547 (https://www.chainreactioncycles.com/michelin-country-rock-mtb-tyre/rp-prod8547) very cheap but seem just right for the riding I will be doing.
I would expect it to fit. A rather conservative chart of which tyres fit which rim width (1.75" is 47 mm when it comes to tyre sizing standards):
https://bike.bikegremlin.com/285/bicycle-tyre-dimensions/#2 (https://bike.bikegremlin.com/285/bicycle-tyre-dimensions/#2)
I have just twigged your avatar.
Your site was very helpful, I have come across a few similar about sizing and widths but seem to confuse more than help, nowhere could I find that definitely told me that 47 was 1.75 especially when 1.50 is not 1 1/2.
My inside rim is 19.40 so I am good to get the 1.75s which are on order - so thank you for your help.
Glad it could help. The site started by publishing my own notes - that I use to help myself (can't memorize everything always). After a wise friend told me I should put that on-line, so I can use it wherever I go, and "perhaps someone else could use that".
It's still used that way: the way I would like to have things explained to me. :)
A few years later, I published the stuff that helped me keep the cycling site running, effectively making an IT website, done in a similar way (long, thorough, boring): :)
https://io.bikegremlin.com/ (https://io.bikegremlin.com/)
And, finally, just for fun, a personal blog, with stuff & nonsense, which I don't really expect anyone to read, but it feels good writing it :)
https://blog.bikegremlin.com/ (https://blog.bikegremlin.com/)
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Interesting stuff Slaninar. My new 1.75 tyres arriv an al fitted and I am very pleased with them at £8.99 each.
I now think I would like to raise the handlebars but problem is its tight height where the bike is stored so I am looking at adjustable ones I can just drop down for storage but if I buy these https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1 (https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1) will they just snap and kill me. Chinese crap.
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Interesting stuff Slaninar. My new 1.75 tyres arriv an al fitted and I am very pleased with them at £8.99 each.
I now think I would like to raise the handlebars but problem is its tight height where the bike is stored so I am looking at adjustable ones I can just drop down for storage but if I buy these https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1 (https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1) will they just snap and kill me. Chinese crap.
Metal parts generally show signs of breaking on the outside (unlike carbon fibre ones). Thin - like a strand of hair, but visible.
"Zoom" make is sold here, locally, and works fine. Costing about 20 euros a piece.
However, I've never seen anyone use it to often change the position.
My main worry would be the bolt that holds the adjusted position (angle).
Would have to check - but I think that even if the bolt for fixing it snaps, it won't come apart immediately. It will start going up/down, but think that it's attached in a way that it won't immediately get completely detached.
I've seen some models with another bolt holding it tight from below, once tightened. It can't be seen in those pictures, even if it is included.
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Interesting stuff Slaninar. My new 1.75 tyres arriv an al fitted and I am very pleased with them at £8.99 each.
I now think I would like to raise the handlebars but problem is its tight height where the bike is stored so I am looking at adjustable ones I can just drop down for storage but if I buy these https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1 (https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1) will they just snap and kill me. Chinese crap.
Metal parts generally show signs of breaking on the outside (unlike carbon fibre ones). Thin - like a strand of hair, but visible.
"Zoom" make is sold here, locally, and works fine. Costing about 20 euros a piece.
However, I've never seen anyone use it to often change the position.
My main worry would be the bolt that holds the adjusted position (angle).
Would have to check - but I think that even if the bolt for fixing it snaps, it won't come apart immediately. It will start going up/down, but think that it's attached in a way that it won't immediately get completely detached.
I've seen some models with another bolt holding it tight from below, once tightened. It can't be seen in those pictures, even if it is included.
This one https://www.amazon.co.uk/Zoom-Adjustable-Stem-Ahead-Clamp/dp/B001RB21W6 (https://www.amazon.co.uk/Zoom-Adjustable-Stem-Ahead-Clamp/dp/B001RB21W6)
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Interesting stuff Slaninar. My new 1.75 tyres arriv an al fitted and I am very pleased with them at £8.99 each.
I now think I would like to raise the handlebars but problem is its tight height where the bike is stored so I am looking at adjustable ones I can just drop down for storage but if I buy these https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1 (https://www.ebay.co.uk/itm/110mm-Adjustable-Mountain-Bike-Handlebar-Riser-Angle-Bicycle-Stem-Extender/293625040556?hash=item445d6a8eac%3Ag%3AP8QAAOSwgtpe8vai&LH_All=1) will they just snap and kill me. Chinese crap.
Metal parts generally show signs of breaking on the outside (unlike carbon fibre ones). Thin - like a strand of hair, but visible.
"Zoom" make is sold here, locally, and works fine. Costing about 20 euros a piece.
However, I've never seen anyone use it to often change the position.
My main worry would be the bolt that holds the adjusted position (angle).
Would have to check - but I think that even if the bolt for fixing it snaps, it won't come apart immediately. It will start going up/down, but think that it's attached in a way that it won't immediately get completely detached.
I've seen some models with another bolt holding it tight from below, once tightened. It can't be seen in those pictures, even if it is included.
This one https://www.amazon.co.uk/Zoom-Adjustable-Stem-Ahead-Clamp/dp/B001RB21W6 (https://www.amazon.co.uk/Zoom-Adjustable-Stem-Ahead-Clamp/dp/B001RB21W6)
Looks the part. It is also cheap Chinese part, but all I've seen have worked fine.
Still - don't see if it has two bolts to hold it in place.
Just make sure you get one that fits your steering tube and handlebar diameter.
https://bike.bikegremlin.com/3729/bicycle-stem-size-standards/ (https://bike.bikegremlin.com/3729/bicycle-stem-size-standards/)