[greenaero]

Hi, I run 15/37 on my nonradical moto and 15/33 on my fully streamlined moto. The 15/37 combo works well and is about as tall as one can use without giving up a lot acceleration and ease of uphill starting from a dead stop. The 15/33 combo works OK only with the benefit of the streamlined bodywork and can be challenging for uphill starts. The taller gearing brings down the rpm at 70mph to 7000 for the 15/37 and 6500 for the 15/33. This helps a lot with fuel economy and comfort on the freeway.