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No, that's wrong. And they've used the same width range for the tyres http://www.challengetech.it/products/ro ... nca-040/en If it was for tubs you'd be having to ride on something like a CX18

most are 20, things like SSC, Nemesis and Synthesis were closer to 22, some of the TT specific one were under 20.

You sure that's not for the tyres rather than the tubs?

Oh, and another thing. If you're going to use wider tubs then you might want to think about using wider sprint rims. Have you already decided on the rim?

Thanks. PM when it's in please.

I have used both the 30mm Strada Biancas and the 27mm Paris Roubaix tubs and they are both up to the job. The thing with the Biancas is that they are actually a tad over 30mm wide -- a bit more like a 31mm and a bit -- and like all tyres of this sort of size the depth of the tub has to be...

Thanks for your input, the M-Part is too big. Be interested in the Zenith GEX-02 expander please.