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  • Help!

    I'm trying to put some larger tyres on a Dolan Precursa with Alpina forks. Apparently people are successfully riding around on 28mm tyres.

    I've got 25mm tyres on the wheel at the moment and there's plenty of clearance.

    But when I put the brakes callipers on instead of sitting against the forks like:

    it sits like this:

    forcing the brakes to lean onto the tyre:

    I've tried 3 different sets of callipers 2 of which say they clear 28mm. It feels like maybe the brake hole in the fork isn't as flush as it should be.
    Has anyone got a cunning solution? can i file the top of the brake hole to level it off? is that a terrible idea?

  • The direction of the drilling looks fine, it's just been done a bit low. New fork time, I think.

  • You could try a washer or two on the bolt to push the caliper further forward

  • Do they still hit the tyre when the pads are close to the rim, like in actual use?

  • Try to undo the bolt in red as much as you can, see if it makes a difference.

    Also, that washer between your fork and the caliper, try removing that, could work with moving the red bolt all out

    That said, both your pads seems to be at the bottom of the caliper arms (in blue) which might suggest a new caliper might be the best solution.

  • With the Alpina forks Dolan says the max tire size is 23mm, for 28mm you want Dolan's own.

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