• Any suggestions?

    Get a 34.9 in a #tester_approved pattern and some 0.2mm/0.008" shim stock. This is literally the best place on a bike to use a cylindrical shim, since it has no loads to take except the radial compression

  • By shim stock, you mean beer can, right? Or do I need to find brass?

    Beer can too thin, get some brass or perhaps stainless steel

  • beer can, right?

    Depends on the beer. Modern aluminum cans are about half the thickness required. If you can be arsed to cut two shims, then yes, go for it, at least as a temporary measure. I'd go with brass as an optimal choice between an aluminium clamp and a carbon frame, although it seems hard to get 8thou in small quantities at the moment.

  • do I need to find brass?

    I've found enough 0.008" tinned steel in my shim cupboard to suit your needs. If you want it, send me you address and I'll put a stamp on it.

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