You do know that the american system still uses aspect ratio? This is true even with your car or truck tires.

 

I will let you guys know how he likes it. It might going to take a few weeks to get them on since it's either riding the bikes or fixing them up. Anyway, I really like Kenda,s website, has all the specs for each tire so you can compare the diameter, sidewall, thread depth either in inches or millimeter.

http://www.kendausa.com/en/home/moto...master-ii.aspx

 

My new tire is a 4.60x18

18 inch rim and its 4.6 inches wide. Although there is a sidewall...obviously, they don't include it in the size.......It doesn't matter, I learned what I needed to.

Thanks.