Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Bikes: 7⃥ 9 road bikes
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i would think that we would need to know the type of BB SHELL your new frame will have. or are you planning on buying a frame that facilitates a BB that, in turn, facilitates your existing crank?
when changing frames a series of precedents must be addressed. material, clearance, size, suitiability to intended use of components, etc., etc. i wish it were simpler.
i say this because BB shells now come in various configurations as to width, ID, threaded or press-fit, etc. if it were me, i would first get the frame that i wanted then possibly address the crank issue.
or find a frame that only addresses your tire width issue and is in all other respects the same. good luck to you.