Originally Posted by
Igualmente
Perhaps "somewhat cross chained" could be defined. Also, on a 10 speed cassette, what is "actual damaging cross chaining"? I generally avoid the two most extreme cross chaining cogs, but am I doing damage by allowing use of the 3rd most extreme?
Is wear really damage? At extreme angles the drivetrain will wear more rapidly but is it really a big deal to you? For many years I used a 53/39 with a 12-25 cassette, often crosschained for short climbs(1-2 miles). With that type of use, I would typically get about 18k miles out of a cassette, and 40k miles from the big ring, before starting to notice any roughness when installing a new chain.