ratebeer

I'm in with C. Walton on this one.
Weight training will make you look cooler (like steroids would too), but it most likely won't improve your performance and just as likely might hurt it.

If you want stress and pain to pay off in the form of increased power on the bike, then do steep hill climbs and brief high load sprints (maximize your torque) with adequate rest and daily stretching. Integrating these workouts late in a training period, before rest days, will probably yield best results.

You break down when you strain and you build up when your rest. Learning to rest effectively is a big part of cycling strength gains.