Shimano Cassette Compatibility Q.

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2007-03-20 8:45 AM

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Champion
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Rochester Hills, Michigan
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Subject: Shimano Cassette Compatibility Q.

OK, Q for the bike shop gurus...My tri bike has DA 7800, with a 10-speed cassette on the rear wheel.  My road bike has a 105, with a 9 speed cassette on the rear wheel. 

The Q is:  Can I use the rear wheel with a DA10 cassette on the road bike currently set up for the 9-speed?  If so, what adjustments need to be made?  Thanks in advance.

2007-03-20 8:48 AM
in reply to: #729821

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Giver
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Subject: RE: Shimano Cassette Compatibility Q.
You can't use the 10sp. cassette on the 9sp bike--the chain is too wide for the narrow spacing of the 10sp. cassette. What you can do is put the 9sp. cassette on the 10sp. wheel.
2007-03-20 9:16 AM
in reply to: #729821

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Regular
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Subject: RE: Shimano Cassette Compatibility Q.
yeah its a clearence issue. When they went to 10speed all they did was shrink the spacing between cogs and made the chain skinnier. so the 9-speed to 10speed swap or vice versa wont work
2007-03-20 9:19 AM
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Edited by JeepFleeb 2007-03-20 9:19 AM
2007-03-20 9:24 AM
in reply to: #729821

Champion
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Rochester Hills, Michigan
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Subject: RE: Shimano Cassette Compatibility Q.

Thanks for the input, Jim's and Aaron.

And a follow on question.  I got conflicting information from the Shimano website (which says you can't use the DA Freehub with a 9-speed cassette), and sheldon brown (who says you can use a DA freehub with a 9-speed cassette, but you have to use a spacer).   

Can anyone confirm either of these?

2007-03-20 9:41 AM
in reply to: #729903

Cycling Guru
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Subject: RE: Shimano Cassette Compatibility Q.
Horsepucky .... you can run an 8, 9, or10 speed cassette on any and all 8/9/10 speeed hubs.  The only thing you might need is a thin spacer (like 1 or 2mm) to make sure they are snug in place and don't "rattle."  The slotting is the same for all three (the grooves on the inside of the cassette).

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