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9 Speed Shimano Chainring Compatibility

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9 Speed Shimano Chainring Compatibility

Old 08-14-08, 06:50 AM
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tlarwa
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9 Speed Shimano Chainring Compatibility

Stopped at my LBS and asked for a 9-speed Ultegra compatible 53-tooth ring to replace the 48 on my son's Cannondale. Anyway, the least expensive one he had was a SR (or SK, I can't remember at the moment). I took it home and was looking at it closer, and it's not ramped or pinned (although he had it tagged as being for Ultegra or Dura-Ace (which in and of itself makes me wonder, as I thought DA and Ultegra used different rings?). Before I tear the bike down (I'm replacing the chain, RD and cassette as well), will this ring work with my set-up (Ultegra FD/RD/crankset, 9-speed)? The shop is about 75 miles away in Madison, WI, so it's not like I can just run back there to return it.

Thanks!
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Old 08-14-08, 11:12 AM
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Al1943
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The Ultegra SL crankset and rings have a gray finish. In 10-speed the model numbers are 6601 for a double or 6603 for a triple. I'm pretty sure that all Shimano roadbike chainrings have been ramped and pinned for many years.
Does the chainring have a model number stamped into it?
Is the BCD (bolt circle diameter) correct for your son's crankset?
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Old 08-14-08, 01:28 PM
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The ring is definitley not Shimano. It's a black SR ring, without any ramps and pins. It'll probably work, but may not shift quite as well as one that is ramped and pinned. I'll give it a shot and see what happens. If it shifts like poo I'll track down a different ring. The bike has 38/48 Salsa rings on it now, and it seems to shift fine.
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Old 08-14-08, 01:56 PM
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Any ring will work that fits on the crank spider. I have a 53/42 Sugino from the 70s or 80s that works fine with 105 front der and brifter.
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Old 08-14-08, 02:10 PM
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Sounds like that's a ring that's better for SS or fixed. but it'll work. Your front shifting may not be as crisp as a ramped and pinned ring, particularly when really torquing on the drivetrain.
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