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withered_preacher

Frame building question: How difficult would it be to combine a 42mm chainline, capacity for 40mm tires with fenders, and a 120mm OLD?
Critical missing info: Using single speed/ track crank with a narrow tread (Andel Campy Record copy)

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gbj_tester in reply to @withered_preacher

42mm chainline, capacity for 40mm tires

There's your trouble. Allowing proper clearance on the tyre and the chainring spider, assuming a conventional track type design, you have about 9mm width available where the chainstay passes between the tyre and the chainset. It's not an insoluble problem, but it's not going to happen with a straight steel tube running from BB shell to dropout.

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withered_preacher in reply to @gbj_tester

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?

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