I put a cateye Strada on my bike....only problem is that the tire chart only goes up tp 700x40C
and my tires are 700 x 42 c....so I used the number for 40....just guessing at what the numbers are measuring....

Will my readings be way off? The number I need is "L" and for 40C it was 2200.

can you tell i can follow directions but have no idea what i'm doing yet???