2001 Honda S2000 Vibration

I have a Honda S2000 here. Running well until last month. I've noticed the steering wheel and gas pedal etc is vibrating. There is a noticeable vibrating noise on the front end of the car. I pulled over to check it out and the front passenger side wheel was pretty hot. Every other wheel was cold and seemed normal. Since then I've been driving it as little as I can. Havent took it to the dealer yet because they are normally close by the time I get of work. I don't know where to start or what's causing it. The vibration only occurs between 45-55 mph.