• Forgive me if this has been asked but I'm struggling to find any info online...

    650b wheels in a frame designed for 27" wheels using loooong drop calipers. Can it be done?? Anyone here done it? I have a very old frame I'd like to squeeze some nice tires into.

  • I advised against it, 700c already have a long reach with the brakes, 650b way too much.

    A lots of 80/90 steel frame (as long its 700c) is more than enough for 650b conversion.

    If you want to stick with the frame, 700c plus big tyres and mudguard will work fine.

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