So apparently using a 165mm crank is the optimal choice for most road cyclists, but is it really a game-changer for those who are already comfortable with a 160mm or 170mm setup? I mean, whats a 5mm difference really going to do for you - shave off a few seconds on a sprint or just make you feel like youre getting a better pedal stroke?
Are the benefits of a 165mm crank mainly for riders with a specific leg length or riding style, or is it just a marketing gimmick to sell more high-end groupsets? And what about the overlap between the different crank lengths - is there really a noticeable difference between a 160mm and a 165mm crank, or is it just splitting hairs?