The Rotor 3D+ InPower Power Meter Crankset is a high-quality and reliable power meter designed for cyclists. Made from durable aluminium material, this 170mm crankset features a 110bcd design and comes in a sleek black colour. The lefthand crank provides accurate power measurements to help cyclists improve their performance and training regimens. Suitable for both indoor and outdoor use, this power meter from Rotor is a must-have for serious cyclists looking to enhance their fitness and power output. I will send the original left-hand crank, a 50 tooth chain ring. If you look at the rotor website, you’ll be able to find out which bottom bracket will fit your frame. The bearings with the chain set will fit a Ridley or a giant frame..