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@dr.oblong
sheldon is the don. i'm sure the QR thing works if you need it to. his gain ratio is by far the best way to calculate the gearing to use, brilliant that he coded a calculator into his site that includes tire dimensions. really sad that his illness has stopped him riding.
as a matter of interest what 3/32 do you use?
i only have room for 1 bike so it has to do a lot of different things which means changing the gearing and therefore sometimes the chain length, i don't think hyper glide is too good for that (my next fixed is going to have really long track ends).
thanks for the miche link (the miche site gives no indication that they do different widths).