Hello, I as well am a "Clydesdale" 5'11" 250# at 41 years old. I started casually cycling about 6 years ago to rehab a bum knee, ended up with surgery anyway. I now am a 100% roadie and am riding a 2007 Motobecane that i overhauled with 105 9speed double components and Ritchey wheels, handles me just fine. I started this season at 285# and am down to 250#, its a struggle but I keep trying. I am averaging 100 miles a week and am keeping a 18.5mph pace, I think that's ok? (nothing more fun than keeping up with the little people! I have been training for our local corporate challenge (2 mile time trial) and would like to eventually try a race. Any suggestions from you big guy racers would be awesome!