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Old 06-14-05, 10:03 PM   #1
531Aussie
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will 8 speed rings fit on DA 10sp cranks?

echo echo

I have a bike with all 8 speed stuff, and I'm having trouble getting 9 speed DA 180mm cranks, but 10 speed 180s are readily available
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Old 06-15-05, 12:33 AM   #2
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The 10 spd Dura - Ace has a BCD of 130mm. Check yours, this should work in a pinch, but remember, an 8 spd chain on a 10 spd ring might result in some weird shifting going on!
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Old 06-15-05, 03:47 AM   #3
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thanks.

I've been told that an 8sp chain won't work on 10sp rings, but 9sp will.

I've seen 9 speed rings on 10sp cranks, but I'm still not sure if the 8sp rings will fit.
I can't imagine that the BCD would've changed.
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Old 06-15-05, 06:35 AM   #4
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.. but remember, an 8 spd chain on a 10 spd ring might result in some weird shifting going on!
Why??
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Old 06-15-05, 06:36 AM   #5
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Quote:
Originally Posted by 531Aussie
thanks.

I've been told that an 8sp chain won't work on 10sp rings, but 9sp will.

I've seen 9 speed rings on 10sp cranks, but I'm still not sure if the 8sp rings will fit.
I can't imagine that the BCD would've changed.
The BCD hasn't changed. If chain 'speed' really bothers you, use a 9 speed chain.
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Old 06-17-05, 12:20 AM   #6
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As you go from a 8spd chainring to a nine speed ring, the inner chainring is displaced slightly to the right, and is even more pronounced in a ten speed ring. This "displacement" is done to accomadate the norrower chain. So when you have a bigger chain (8spd ) jumping down from the 10 speed 52 to the 39 -the chain could overshoot the teeth ( ie: sloppy shifting)
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Old 06-17-05, 03:25 AM   #7
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hmm....I see
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Old 06-17-05, 06:44 AM   #8
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As you go from a 8spd chainring to a nine speed ring, the inner chainring is displaced slightly to the right, and is even more pronounced in a ten speed ring. This "displacement" is done to accomadate the norrower chain. So when you have a bigger chain (8spd ) jumping down from the 10 speed 52 to the 39 -the chain could overshoot the teeth ( ie: sloppy shifting)
I don't think there was any change fron 9 to 10 and from shiamno 8 to 9 the teeth were angled slightly inward. Shimano has never insisted you need the specific rings for the application, and I have found that to be true in actual use.
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Old 06-17-05, 06:45 AM   #9
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hmm....I see
Yeah, but don't go to the bank with it.
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Old 06-17-05, 10:35 AM   #10
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Yeah, but don't go to the bank with it.
hmmmm......I see
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