Technical Q&A with Lennard Zinn – Tires, dents and unwelcome upgrades
The ABCs of tire sizeDear Lennard,What does the c stand for on a 700c rim and or tire? What unit of measurement is this and how is it determined?BWDear BW,The “c” is not a unit of measurement. It merely designates a certain international rim/tire standard. A 700C rim has a 622mm bead-seat diameter (diameter of the tire bead circle), and you will often find this number imprinted on 700C tires and rim strips. Obviously, there is nothing you could measure on the wheel or tire and come up with 700 units of anything (the outer diameter of a 700C X 23mm road tire is about 668mm).To illustrate the