Time became any motorcycle with racing pretensions become kitted out with a fifty three/39 tooth chainset; there is a reason it changed into referred to as a "preferred". That was paired up to a 9-speed 11-25 cassette to provide you the proper set-up for all of your driving - assuming you have been amazing-fit. If you wanted lower gears you outfitted a triple chainset. That gave you the lower variety you craved, however on the fee of more weight, mechanical complexity and a reputation for intricate set-up.
For more information, read 53/39t vs 50/34t here
