i have an 80 mile rt commute, 60 of which are by bus. i'm also a planner for a transit authority who has bike racks on buses. a few comments:

- carry an old tennis ball that you've cut open. slide ball over support arm on rack to prevent rubbing.

-fenders are "not recommended" but you can make them work.

-transit advocates fight the same fight as cyclists advocates, and sometimes on behalf of cyclists (read: racks on buses). give the bus trashing a break thx