• Currently using a Dura Ace 9000 front caliper (Front only as Fixed) with Continental GP4000sii 700x25
    Now we all know these tyres measure bigger than they should.
    I want to fit 28s.
    Plenty of clearance on the rear as I had the frame made to accommodate although might lose a smidge of dropout usage.
    On the front, I have plenty of fork clearance but not enough between tyre and caliper.
    Wheels are 25mm wide (external) carbon so tyre 'height' is about going to be about 1mm from caliper.
    Should I just stick with a 25 on the front or can anyone recommend a caliper that may offer better clearance?

  • So you're essentially looking for something that has the minimal amount of caliper directly below the mounting bolt. That is unless it's the sides/shoulders of the tyre that is rubbing rather than the top, which is it? I had a similar issue with a rear, single pivot Campag Record caliper, which I sorted by fitting a dual pivot, old(er) school Centaur caliper instead.

    As far as I can see the DA9000 already has quite a big cutaway arch to give good tyre clearance, so I can't see how you're going to improve much on that. If you're having tyre-caliper clearance issues, you'll probably also want something with very little drop, so that limits your options too.

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