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  • I read a review comment on the G+ page on CRC and the guy said he was running 28c on 303s in the same frame (hi-mod synapse), but he was in Dubai and riding them at 110psi.

    Unless he is pushing over 100kg, that is way too high a pressure.

    Ideally, 80psi rear, 60psi front give or take a person's preference and weight.

    Your clearance look OK, as long the wheel is well build, and the tyres pressure is idea for your weight.

  • Agreed. I've never ridden my 25c corsas over 70/75. My question about the clearances is am I likely to get issues with an extra 3-4mm of tyre in the 7ish mm of space I've got spare if I upgrade to 28c?

  • Sorry I missed that part! I think 28mm will be a little on the tight side.

    You can probably get a better idea by pushing the rims on the side and see how close it is to the chainstay, personally on a carbon bicycle, I'd er on the side of caution.

    Beside the Corsa G+ is a very comfortable tyres even in 25mm.

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