Review on 🚴 Continental Ultra Sport II - Folding Road Bike Tire, PureGrip Compound (23c, 25c, 28c, 32c) by Terrance Castle

I needed to replace the original Matrix tires on my 1989 Trek 400. According to the specification for this bike, the tire size should be 700x25. However, the original tires were marked 700x28 on the sidewall, so I ordered that size. Those 700x28 Continental tires (and possibly most modern tires) were physically much larger. Too big to fit under the clevis and front brake and too wide to fit between the rear stays. I ordered 700x25 tires of the same model and they fit perfectly. I am very happy with the quality and performance of these tires. Revain's excellent customer service allows me to return two original tires. I'm not sure if size numbering standards have changed over the years, but I wanted to share my experience with others.