This SRAM Red22 Quarq Power Meter Road Crankset has some wear on the crank arms from heel rub, but is generally in good condition. 172.5mm crank arm length and 53/39t chainrings. The power meter is a 3 bolt direct mount, so if you have a different slightly older sram crankset and like it, this is a pretty good deal to add power. It works with a BB30 bottom bracket, which is available for most bottom bracket shells if your bike doesn't already have a BB30 setup.