Join Date: May 2002
Location: Near Portland, OR
Bikes: Three road bikes. Two track bikes.
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Suntour and Shimano rear derailers are different. To go from a suntour cassette to a shimano cassette, you probably should change the rear derailler.
If you are already upgrading, just go straight to 9 speed. 8 speed is getting phased out and even 9 speed is going away.
I have a bike which has a 126mm rear chain stay spacing. Expanding that to 130mm is no problem what so ever. The only issue is with wheel changes, it requires a bit more finesse to get the wheel in and out. When you are putting your wheel in, just pull the chain stays apart a couple mm and pop the wheel in.
Cat 2 Track, Cat 3 Road.
"If you’re new enough [to racing] that you would ask such question, then i would hazard a guess that if you just made up a workout that sounded hard to do, and did it, you’d probably get faster." --the tiniest sprinter