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SRAM 10 Speed Rear Derailleur with 9 Speed Gripshift

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SRAM 10 Speed Rear Derailleur with 9 Speed Gripshift

Old 05-01-12, 12:58 PM
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jackster57
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SRAM 10 Speed Rear Derailleur with 9 Speed Gripshift

I am wondering if I can use a SRAM XO 10 Speed Rear Derailleur with a pair of 9 Speed Grip shifters / 9 speed chain and cassete? I believe the pull ratio is the same, so if I set the limit screws correctly I should be able to use it as a 9 speed derailleur, correct?
Thanks.
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Old 05-02-12, 06:33 AM
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I was able to do it with a 7 speed shifter & an 8 speed cassette, so I don't see why it wouldn't work.
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Old 05-02-12, 06:53 AM
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I would say so, as well; the indexing is done through the shifter, I don't see SRAM doing any sort of 'special engineering' to keep the 10-speed derailleurs separate from the 9.
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Old 05-02-12, 11:54 AM
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To the OP, it should work, provided the pull ratio is the same 1:1 that SRAM loves so much.

Originally Posted by samburger View Post
I was able to do it with a 7 speed shifter & an 8 speed cassette, so I don't see why it wouldn't work.
Sam, your set-up worked because when going from 7spd to 8spd, manufacturers added more space with a longer freehub. When going from 8spd to 9spd to 10spd, Shimano/Sram just crammed more cogs into the same space by making the gaps between the cogs smaller.
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Using a nicer sealed bearing headset vs a $10 set is like throwing a frisbee vs a dodgeball.
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Old 05-03-12, 02:34 AM
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Yes, a 10spd derailleur will work with 9spd shifters. A derailleur is a "dumb" component and basically a spring as long as you set the limit screws.
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Old 05-03-12, 09:46 AM
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Not in Shimano's case. 9spd mountain and 10spd road are interchangeable but 10spd Shimano mountain uses a variable pull ratio and won't work with your 9spd shifters.
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Originally Posted by sp00ki View Post
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