• Here's a GK 650b 42mm on a 21mm internal. 2mm clearance on the fork, plenty at the back.* I think if one wanted to do this the best option is to try to find a road A2C fork that will take a bigger tyre - you might even get away with a 47mm then

    This is V1, not V2 as I said above

    * two points: a) ignore the mudguards, it's the width that is tight b) my flatmate is using my rear wheel so that's the front jammed in at very close to the right place

  • Thanks, that's useful info.
    What I want to do is have two wheel sets that I can interchange with the minimum of fuss. So a 700 set for tarmac and the 650b with knobbly tyres for off road. So looking at tyre options of around 40mm I guess

About

Avatar for motman @motman started