I had looked at the schedule and race map, not very specific. The singlespeed catagory is mixed with "clunkers", and first timers. That race starts at lunch time, not sure thats the right catagory for me. Okay here is the blonde part of me asking about the womens catagory. They have two classes, womens A & B, 1-3X, and they are divided by 30 or 45 minutes. Whats the difference? Do you race for 30 minutes and see who gets the farthest? I am leaning more towards the mountain bike, the singlespeed is steel and heavier that the stumpy. It is just a low end bikesdirect toy I bought for our nasty georgia roads. I am hoping to scope out the course when I can, it will be flat and probably have lots of barriers to run over. I have no expectations for anything, just like my first sprint tri, and this is also virgin territory for the club hosting it. Here goes nothing! Thanks for the advice.