Pete Biggs said:MartinM said:Another question, if a see a wheel that is cassette fitting how do I know if it is 7,8,9 or even
10 speed comaptible just by looking, is the cassette housing wider? also if it it the same does
the wheel need to be dished differently? or is the golden rule to buy hand built wheels with the
gear number on the hub specified?
The same Shimano hubs can take both 8 and 9-speed cassettes. 7-speed body must be shorter
(although I'm not too familiar with them myself). I don't know about Shimano 10-speed but I would
guess they have a different spline pattern. Campag 9 and 10-speed hubs are one and the same.
Campag 8-speed have shallower and smaller splines than Campag 9/10sp. I think the answer is to
become familiar with each type by sight or just trust your supplier.
~PB
The freehub body on sevens is shorter than on 8/9s. Sheldon Brown has an excellent page on this.
Remember they are usually interchangeable, you can fit a 8/9 speed body to an older hub made for 7.
I have chanegd the freehub from a 7 speed UG to a 7 speed HG, easy as pie.
Wheel dishing places the rim in the centre of the dropouts, so if you have a 7 speed with 126mm
spacings and change it for a wider 8/9 with 130 mm spacings, the extra 4 mm will be on one side so
your wheel should be re-dished to move the rim 2mm towards the drive side.
Don't know about 10 speed, far too new for me. Try asking on rec.bicycles.tech, Sheldon Brown and a
couple of other very helpful shop mechanics contribute there.
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