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Old 02-19-12, 10:38 PM   #1
pdxtex
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8 speed cassette, 10 speed rings, will it work??

after consulting numerous sources, both on-line and with 3 mechanics, the consensus was all the same, yes, should be fine. shimano advises not to as "skating" of the chain back and fourth may be an issue. soooooo....i installed two new alloy rings on a triple crank, yes they are triple rings also. in the stand everything seemed great. hit all the gears well and seemed smooth. went for a test ride today and when back pedaling somewhere along the way the chain seems to catch or at least run into some resistance. derailleur is not bent, no kinks in links as far as i can tell, and i cleaned the hell out of the pulleys too. the free hub spins fine also. nothing wrong there. it was catching so much at times that the chain would sag and hit the chain stay, definitely not moving freely in reverse....any ideas?
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Old 02-19-12, 11:29 PM   #2
Bill Kapaun
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What speed chain?
Maybe it's too tight on the cassette? (if 10 speed)
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Old 02-20-12, 12:14 AM   #3
pdxtex
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chain is also 8 speed. not that old either. i replaced it back in november and ive only ridden the bike a few hundred miles before i changed the rings. its definitely a problem in the back. either a hub issue i am overlooking or just a #%^d derailleur. or perhaps its just dirty as heck.....i blasted the whole backend with some wd-40 and let it soak for ahwhile. put it back in the stand and it seems to run much better. will try a road test tommorrow to see what happens...
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Old 02-20-12, 02:14 AM   #4
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Get on your hands & knees and look from the rear-
Does the guide pulley line up exactly with the cog selected?
Does the tension pulley line up with the guide pulley and cog?
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Old 02-20-12, 04:02 PM   #5
pdxtex
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i think it was just a gunked up derailleur. after the liberal soaking with wd-40, cleaning the pulleys, and degunking the derailleur cage, it seems ok. hits all the gears going forward and i vigorously backpedaled in every gear combination without any catching. chainring/chain mismatch is still ok.
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