For mountain bike riders we offer a stages power meter available as a power meter only non drive crank arm for existing shimano xt m8000 singledoubletriple cranks the new stages power meter is slimmer and up to 28 percent lower profile than our original meter its sleeker by way of a 17 percent reduction in frontal area and weve also made it stronger the new housing design increases the strength of the battery door and housing connection by 200 percent over the previous design specifi