• I don't doubt that but everything else being equal, are 33-35mm tyres really better than 40mm+ in muddy conditions?

    I just thought it was because having bigger tyres would make it easier and kinda take away what cyclocross is if they could all run 2 inch mtb tyres.

  • I believe the idea is to cut through the mud and hit something a little less soggy underneath. Chunkier tyres would get clogged pretty quickly. MX bikes come to mind.

    Testing true effectiveness of 33 vs 40mm tyres is a whole other thing. Saying all that, it's all swings and round abouts.
    Few years ago we were all rolling on 23c tyres and 650b was an anoraks' plaything.

  • 650b was an anoraks' plaything.

    I resemble that comment.

  • By MX bikes do you mean Motocross? Their tyres shed mud as they flex ,they change shape quite radically squashing at the contact patch. 19” rims 120mm tyres maybe 20 psi.
    Tyres and indeed shoes that don’t flex tend to clog up like clogs.

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