05-06-15, 05:52 PM
My tyres were badly wore down, so I got new tyres fitted today (Bridgestone T30 Evo), but after getting the tyres fitted, I noticed a loud whining noise coming from the front end around 25mph and also a very noticeable vibration through the handlebars and footpegs at around 20mph. I brought the bike back to the tyre fitters where he checked both wheels and even replaced the front tyre just to be on the safe side. He didn't think there was anything wrong with the front wheel; he suspects it's to do with the chain. He checked the wheel alignment with his laser rig etc. and he loosened the chain a bit as he thought it was a little too tight. He mentioned there being a tight spot on the chain.
The problem is that this issue definitely didn't exist before I got the tyres changed today, so I find it hard to believe that it's the chain causing the issue.
The only other point to note is that my previous front tyre was a 120/70 instead of 110/70. Now that I have the correct size on the front, the bike handles much better.
Things I'm planning to do to try to diagnose the issue: Increase the air pressure of each tyre to around 42R 36F, because I asked the fitter what pressures he sets them to and he said 2.5 and 2.3 (or 35 and 33PSI I think). I'm a very big guy and I think the higher pressures will be better for me, though I don't know if low pressures would cause the symptoms I'm experiencing. I'm also going to clean and lube the chain to see if that makes a difference.
Any ideas what this could be?
Thanks in advance.
The problem is that this issue definitely didn't exist before I got the tyres changed today, so I find it hard to believe that it's the chain causing the issue.
The only other point to note is that my previous front tyre was a 120/70 instead of 110/70. Now that I have the correct size on the front, the bike handles much better.
Things I'm planning to do to try to diagnose the issue: Increase the air pressure of each tyre to around 42R 36F, because I asked the fitter what pressures he sets them to and he said 2.5 and 2.3 (or 35 and 33PSI I think). I'm a very big guy and I think the higher pressures will be better for me, though I don't know if low pressures would cause the symptoms I'm experiencing. I'm also going to clean and lube the chain to see if that makes a difference.
Any ideas what this could be?
Thanks in advance.