Subject: RE: 28mm tires? Not all tires labelled "28mm" are going to actually measure that - there's quite a bit of variance in different models. And the rim itself will determine how wide the tire actually ends up being when mounted. A 28mm tire is going to measure way wider on a 30mm wide MTB rim than on a 21mm wide road rim.
Another important consideration is if you can even fit tires that wide on your bike. I run 23mm GP4000sII tires (which measure closer to 25mm ) on my P2C and that's about the limit of what I can fit on without rubbing. Most newer bikes are built to accommodate wider tires. Most older bikes are not.
Finally, there's a tradeoff between Crr and CdA. Wider tires have a better rolling resistance, but are going to be worse aerodynamically, especially if you don't have new wide aero rims. For overall speed, if you've got older rims you should stick with 23s. If it's comfort you're after rather than speed, then yeah, 28s at 80 psi are quite luxurious. |