• I have just bought a cheapie set of 650b rims which are tubeless ready.. can anyone recommend some 650b tubeless CX tyres that would fit a frame with clearance for 28mm 700c?

  • There's no set rule to tell how much you'll be able to fit. Mount the rims, get a Vernier and check the clearance where the tire would be, that would give you an idea.
    You may end with fairly smaller wheels than the 700c equivalent, make sure the bottom bracket doesn't end too close to the tarmac

  • tubeless ready.. can anyone recommend some 650b tubeless CX

    You're fishing in a small pond if you want 40-584 tubeless CX, the serious CX tyres tend to stick to UCI 33mm max, and the bigger 27.5 tyres mostly start at 2 inches. Maxxis Rambler and Schwalbe G-One All Round are the ones which immediately leap out as jumping through all your hoops.

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