I recently got a new bike, a diamondback 21 inch Insight 1, and also got a Bell f20 bike computer. Im confused about the tire calibration on the bike compute. It tell me to enter a 4 digit number, which I understand, but when I went to my tires to get the numbers needed, i was confused. this is exactly what it says-
ETRO 622x 19
im running off this sizing chart- http://sheldonbrown.com/cyclecompute...ation.html#ccc
and the part im confused about is " 28C/38C" according to that chart, where should only be one #C. I need to know the right input number for the bike computer to work correctly. Any help is welcome, thanks.