Originally Posted by
lasthingsaid
Thank you guys for your help! I just wanted 20 speeds because I commute and do club rides on the same roadbike, so I would want more gearing options, because before I was running on Sora's and now I have an older 105 groupset that's 9 speed. I wanted to have a 10 speed cassette but I wasn't exactly too sure on what to get from the shop.
The high end and low end of your gearing can be the same for 9 speed and 10. its just the steps in between are lessened with 10.
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2010 Kestrel RT900SL, 800k carbon, chorus/record, speedplay, zonda
2000 litespeed Unicoi Ti, XTR,XT, Campy crank, time atac, carbon forks