Thanks Garyb,
Wow, I get about 220 miles out of a tank on what I assume is standard gearing, not actually counted them... Is the lower fuel economy really effected that much by having one extra tooth on the rear??!! Obviously revs will be slightly higher while maintaining a certain speed each time you add a tooth to the rear but I wouldn't expect it to make such a huge difference although mpg and range per tank can be different because of so many reasons.
Maybe when it comes to changing my rear sprocket I'll get one with a couple more. is it 3 teeth added to the back has the same effect as dropping one tooth on the front? Obviously easier to change the rear one for more teeth anyway though.
I was looking at a few on line last night and found a few that were 49 or 52 teeth, I don't want to go nuts with it though and have a sprocket as big as my back wheel! haha. Anyone tried a 52 teeth one?
Chris