[Please, no T&A jokes.]

Hmm. Swapping out tires to go out for a wet and muddy ride.

Notice that I have an “A” and a “T” written separately on each of the two Challenge Limus clinchers I’m installing. I can’t remember what those letters mean. Must be some sort of code about which one should go on the back wheel (more wear) but can’t see a marked difference.

Anyone have any idea?