This sale includes the CyclOps Powertap SL 2.4 unit built up on a Mavic Open Pro 32 spoke rear wheel. Also includes a freehub for a Shimano or SRAM 8 to 10 speed cassette. Rim is clean and structurally sound with many miles left. No bent spokes and does not need trueing and probably never will. In order to use the power meter function, you will need to already have a Cycle OPS computer.