Hey all. i have my first tri of the season coming up in april and was simply deciding on what bike to use for race day. as i'm mainly into off road racing and the absolute fun aspect of it (even tho i'm not too shabby of a competitor) the race i'm doing is a road style sprint race. i'm considering doing it on either 1) my single speed. it's a converted trek 1000 w/ a 39/11 gear configuration with only a front brake, no rear brake. my first question is, would it be illegal to race without a rear brake? (it would be easy enough to switch it back to a geared bike and put a rear brake on it, but single speeds are more fun :) 2) or i'm possibly considering doing it on an old 1950s style schwinn cruiser bike that has one of the big headlights on it! on this bike, i would likely wear cut-off jeans and an un-buttoned hawaiian shirt to keep things fun. considering my outfit, would it be disrespectful to wear this to a race, where admittedly i would beat many newbies and could possibly discourage others. my intentions are to race on the schwinn, but do not want to be disrespectful to the spirit of the race nor do i want to discourage others from racing by beating them on a super shitty bike. you make the call! :)