• I've ridden 23 - 28mm on narrow rims, 25mm on TB14s, 23mm tubs on deep carbon track wheels and 25mm tubs on Zipp 303s and I would be hard pushed to describe the difference between any of them. I do notice some difference when I ride CX tyres though.

  • As you know it's the pressure you can safely run that makes the difference.

    Between 28s on narrow clincher rims and 23s on narrow tubular rims that difference is probably less than 10psi (before 28 starts moving around too much)?

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