Originally Posted by
rowebr
The best guess is that a tire that is 3mm wider will also be about 3mm taller.
However, since you are thinking of changing to a different model of tire and a wider size, that guess could easily be off by enough to run into clearance problems if you have only 4 to 5mm available under the brake caliper. Here's an idea, if the Michelins tend to run a bit large for the stated size then try the 25mm Michelin. Even if it measures 27mm on your rims that will provide a bit more cushion for your commute.
Thanks for the advice!
Yeah.. I would assume this as well that 3mm wider is also 3mm taller.
I looked around online and found the measurement of the 25C Michelin is actually 2mm wider (28mm vs 26mm) and 2mm taller (25mm vs 23mm) already than my 25C Continental.
Michelin Pro 4 Endurance v2 Rolling Resistance Review
Continental Gatorskin Rolling Resistance Review
So the 28C Michelin would possibly be 5mm wider and 5mm taller than my 25C Continentals! The 28C Michelin actually probably measures around 31mm wide. I think the 25C Michelin would definitely fit, but I do want to run the widest possible tires for extra comfort over the potholes. I guess I will order both the 25C and 28C Michelins, and then return or Ebay the 28C if they prove to be too wide.
Thanks!