A 28c tyre pressure should be a fair bit less than a 25c to be equivalent. That's why at the same pressure they roll faster. A 28c at 90psi is absurdly hard, a 25c at 90psi is fine. Equivalent will be pumping the 25s to 110ish.
Armchair rant over, sorry
A 28c tyre pressure should be a fair bit less than a 25c to be equivalent. That's why at the same pressure they roll faster. A 28c at 90psi is absurdly hard, a 25c at 90psi is fine. Equivalent will be pumping the 25s to 110ish.
Armchair rant over, sorry