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it works on a cheap shopper that I have
Let me guess - chainring swaged to the crank (no spider), gas-pipe tubing to retain stiffness despite the crimps, not strictly speaking street-legal clearance between tyre and tube? There are ways and means, but as I said, if you want proper clearance and the ability to use any track chainset, you're too short of space.
gbj_tester-
Not quite, the chainset is the previously mentioned Andel, but gaspipe is correct. The stays are pretty long as the bike was originally built for 630mm wheels and I’m running 622.
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I want to (will) use a single speed Torpedo hub and will check tonight whether I have an offset cog on it and if so, which way it’s flipped.
withered_preacher
That’s what I figured, though it works on a cheap shopper that I have. If I don’t go full on custom the tubing in question is 631, can it be pinched inside and out without compromising it’s strength too much?