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10 speed spacer? needed?

Old 09-03-16, 11:07 AM
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10 speed spacer? needed?

simple quick question.,, i have a 10speed free hub, dura ace.. i am installing a ultegra 10sp cassette..
so do i need a spacer? the box came with one... but i did not there is not one on the old cassette, so i am thinking that this only applies to 10speed to 11speed conversion.. it seem like it shifts the der spacing too much to the right if i use it... sorry for the silly question but.. since i have not used it in the past.. with my 10 speed wheel sets.. im thinking that with a new cassette i should not use it now...

so when should you use the little 1.5mm spacer?
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Old 09-03-16, 11:12 AM
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Shimano 10-speed cassettes used on 8/9/10-speed hubs require a 1 mm spacer behind the largest cog of the cassette. Using a 10-speed cassette on an 11-speed freehub you will need that 1 mm spacer plus an accessory 1.8 mm spacer.
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Old 09-03-16, 01:01 PM
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Yes most of the time this is true but I have a set of Ritchey Protocols that actually do not use the 1mm ring.
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Old 09-03-16, 05:18 PM
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Originally Posted by HillRider
Shimano 10-speed cassettes used on 8/9/10-speed hubs require a 1 mm spacer behind the largest cog of the cassette. Using a 10-speed cassette on an 11-speed freehub you will need that 1 mm spacer plus an accessory 1.8 mm spacer.

Kinda confused by this. I've used, Shimano, a 10-spd cassette on an 11-spd hub with no spacers with no issues. Shifted well and ran quiet.
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Old 09-03-16, 06:27 PM
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Originally Posted by ltxi
Kinda confused by this. I've used, Shimano, a 10-spd cassette on an 11-spd hub with no spacers with no issues. Shifted well and ran quiet.
I'm even more confused about how you did this.
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Old 09-04-16, 05:32 PM
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Originally Posted by HillRider
I'm even more confused about how you did this.
Ignorance, I'd suppose. Upgraded the wheelset on my new this year BMC and hand me down transferred the RS11s to my 2013 10spd Synapse. Just threw the 10spd cassette on and all worked fine.
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