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Old 09-18-11, 12:53 PM   #1
cyclist2000
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Inner Chainring for 10 speed crank

I was looking at replacing my 30 tooth chainring (74mm bcd) with a 26 tooth chainring. The problem is that the chainrings that I am looking at are 8 or 9 speeds. Will the 9 speed work? or if you have performed a similar replacement, which chainring have you used?

The crank is a FSA Gossamer triple and I have been looking at a Sugino and Salsa chainrings.
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Old 09-18-11, 08:09 PM   #2
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I've replaced 30T granny rings with 26T rings on a bunch of 7,8,9 and 10-speed cranks all with the same type of older granny ring and they all work. Some were SR and some Suguino made rings and it made no difference. Ust a "9-speed" ring if you have one but any will work
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Old 09-18-11, 08:29 PM   #3
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an 8 or 9s same chainring should work. The correct separation should be built into the crank arm.

However, you need to be a bit careful because not all inner rings have the same offset, or distance from the crank arm face to center of the tooth. Too much offset will allow a narrow chain to jam between the chainring and crank arm.
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Old 09-19-11, 07:23 PM   #4
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Quote:
Originally Posted by FBinNY View Post
an 8 or 9s same chainring should work. The correct separation should be built into the crank arm.

However, you need to be a bit careful because not all inner rings have the same offset, or distance from the crank arm face to center of the tooth. Too much offset will allow a narrow chain to jam between the chainring and crank arm.
I had that happen on one crank I converted until I reversed the granny ring and that solved it. Reversing it put the teeth closer to the middle ring.
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Old 09-19-11, 07:40 PM   #5
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You may as well go with a 24t. You will have a lower gear if you need it.
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