Bicycle Mechanics - Dura Ace Freehub Compatability - Spacer?
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08-28-07, 10:12 AM
I just bought a set of Cosmic Carbones, and it appears it has a Dura-Ace 10sp freehub. I tried installing a 9sp rear cassette, but the casette wont tighten on it properly as there seems to be about 1-2mm of free play when fully tightened.
Do I have to get a new freehub body, or is there a cheaper solution to the problem? Like a spacer(washer?) I could put on the spoke side of the cassette before installation?
I bought a Dura Ace 7800 10 speed replacement rear cog set and it came with a special 1mm spacer for this purpose. I have never seen the spacer for sale individually though.
08-28-07, 04:52 PM
"2004 Dura-Ace (10-speed) Freehubs were completely redsigned. The Freehub body is now attached to the axle, rather than to the shell. The purpose of this was to save weight and to have the pawls act at a larger radius. Also in an effort to save weight, the 2004 Dura-Ace Freehub body is aluminum. Aluminum Freehub bodies from various other manufacturers have been a bit dodgy, because the material doesn't hold up well against the concentrated pressure of steel sprockets. For this model hub, Shimano raised the Freehub body splines to provide more secure engagement. As a result the 2004 Dura-Ace Freehub won't fit older cassetes.
The new 10-speed cassettes, however, work fine on all 8- or 9-speed Hyperglide Freehubs."
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