This is SRM's standard Shimano crank, actually a Dura Ace 7800 crank set, with a spider for 7900 rings, it has 7900 rings (53/39), is 172.5, and is the newer wireless version. Purchased in June 2011 and used since then. This DOES NOT include a head unit, but does include the bb mounted cadence magnet. Unit has normal wear and tear, it has never been crashed, and in my opinion in pretty good shape cosmetically. If you are interested DM me and I can send you photos of the crank. Asking $2,100. I have all the original info, box, and packing material.

http://www.srm.de/index.php/us/powermet ... e-standard