long list of bike business links via UBI bikeschool.com

One may be able to machine a steerer tube which was thick wall 7/8" ID for most common quill stems, with a 1.125" OD..

sleeve inside, effectively butted .. typical OD steerer, 1" ID, 1/16" tube wall, for 9/8" ... 1/8" tube wall for 7/8 inside, 9/8" outside

rolling threads displaces metal rather than cutting it, thats how spokes are threaded.







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