[JamesMio]

I just had a new chain and rear sprocket fitted at the weekend, but had a bigger rear sprocket put on to try it - Wow!!

What a difference it's made, Ok you lose about 10mph off the top end but the difference in accelleration is very noticable. I also felt the bike was more poised (being easier to get into higher revs) for cornering etc.

I've yet to discover the/any downsides to this but so far I love it!