Ultegra / DA freehub body compatibility
I have a Dura-Ace 7900 freehub which has suffered from notches being worn into the pawls on the body by the sprockets. I've done some research and found that this is a well-known issue with aluminium freehub bodies because although light, they are comparatively soft*.
My question is - can I replace just the freehub body with a lower-spec version that doesn't use aluminium, and still use my existing DA sprockets and everything else? I understand that Shimano only uses aluminium in DA freehubs, so Ultegra, 105 or a SRAM alternative would be fine. My big fear is that the answer is "buy a new back wheel".
Seems like a simple question but Google doesn't have the answer.
Thanks in advance.
* Well either that or my power output is too much for earthly materials to bear. I know which option my money's on.
My question is - can I replace just the freehub body with a lower-spec version that doesn't use aluminium, and still use my existing DA sprockets and everything else? I understand that Shimano only uses aluminium in DA freehubs, so Ultegra, 105 or a SRAM alternative would be fine. My big fear is that the answer is "buy a new back wheel".
Seems like a simple question but Google doesn't have the answer.
Thanks in advance.
* Well either that or my power output is too much for earthly materials to bear. I know which option my money's on.
"We're not holding up traffic. We are traffic."
0
Comments
-
After more googling, more information. Several sources say "any Shim 10-speed freehub body will fit any Shim 10-speed cassette" but then some also say "...except for some DA models which have taller splines".
Also I meant "splines" not "pawls". But it looks as though I will be fine, if I can find anyone selling the damn things. Carry on."We're not holding up traffic. We are traffic."0 -
I've managed to make some little dents in the splines of my (presumably steel) 105 freehub!
I have the power output of a hamster in a wheel.0 -
Take a flat file and take the burs down radially level with the tops of the freehub body.
It's a very common mtb issue and filing them down means the cassettes come off fine. Generally you work harden them initially and after that it doesn't get much worse, although eventually you 'could' wear through.
Personally I would just take the burrs off as per above and forget about it.0 -
Thanks guys - I did file the burrs down but there's the occasional annoying slippage in those gears. The notches are relatively shallow and it feels like the sprocket starts outside the notch and then jumps into it under (obviously awesome) power. But perhaps I will have another go with the file and learn to live with it."We're not holding up traffic. We are traffic."0
-
I thought the Dura-ace were meant to be titanium freehub bodies?Thats what they claim on Madison the UK importer for Shimano.
Just looked at the price of a ne wfreehub and even the trade price made my eyes water.
If they wear that easily I'm glad I went with DT.0
