Tag Bontrager R1 Road Tire Trek Bikes

Current 26+ 700 X 25 Tires

Current 26+ 700 X 25 Tires. (that didn't really exist, rims are measured in etrto which for this side it would be a 622x** where**=rim width, but that's well, i was referring to the 700x25c like the op mentioned. 28c to 32c indicate tires that will work on pavement, but also gravel; My bike originally came with 700x26c tires so i assume i can easily go to either 25 or 28.