
i'm probably gonna have crap answers but,
1, have you seen a road bike? those tyres are dangerous, imagine if you went over anything like dirt, or a pebble, you'd be shredded by the floor.
2, whenever your on a mtb and you go near a roadie, and up hills some of us will catch and pass them

they always move in your bloody way, making you slow down and struggle like them.
3, lycra... i don't want too see any guy's funbag at all, never mind when i'm out doing something i enjoy, plus it does kind of make you look like a giant condom...
4, the riders that i see are always older, and on new expensive bikes, which annoys me, because if your going too be a roadie you can't go slow downhill, it also brings back up points 2 and 3.
5, road bikes, on the whole, look bloody awful, you get the odd gem, but then it's back too a crappy looking bike with a crappy riding position that screws up your back and makes you infertile. personally, i want kids. so yeah...
5 reasons. enjoy
Mike,