Sunday I did 30 miles with my bike buddies and as usual, we climbed to the Griffith Observatory and then descended down the fire road taking the loop around the LA Zoo. Something to note, amongst the 4 of us who were riding, I'm the smallest/lightest and happen to climb the fastest as well. Yet when we hit the flats, our buddy who happens to be the biggest physically (and slowest on the hill climb) just dusted us on the straight aways. We're all running a variation of Shimano 105, but his bike is the only one with a 52/36 front crankset, while we're all running 50/34 cranks. When he pulls away I have to go OOS in a sprint position just to catch up with him while he's still seated. I'm wondering if those 2 extra crank teeth would make that big a difference in speed or is it some other factor?