Okay guys I am new to the site so go easy on me. I am a 52 year old male and ride about 200 miles per week. I have short legs (30" inseam and long torso). I currently ride compact cranks on my road bike (50x36, 11-23), 170mm. For some reason I feel like I can "turn" the cranks" more consistently on my road bike. When I am on my TT bike with standard 53x39, 11-23, 172.5 mm cranks, I always feel like I struggle to get on top of the gear. I have been given advice that the longer cranks give me leverage but if I cannot turn a 53x11 for 40k why not use compact cranks? I am already used to the feel of them and they would help me to spin faster. I know it does not look pro but I am only interested in going faster. If I do go with compact should I ride 172.5 or standard 170mm? I have read an article by Dave Empfield and he advocates riding shorter cranks, due to hip angle and the forward position. I generally avg about 92 rpm @ 25 mph during the races. Obviously not a pro but I always like to learn and get better. Your ideas would be welcomed.