The Fast Forward F6C-C Carbon/Alloy Clincher Wheelset are Control wheels come with four additional spokes in the front and rear wheel compared to the standard wheels. The F6C also comes with a DARC profile on the 58mm deep carbon clincher rims. It’s a great aerodynamic wheel that accelerates quickly and maintains speed very well. The joint of the aluminium brake surface is welded and the rim has wear indicators to advise when the rim needs to be replaced. These Fast Forward wheels are built in The Netherlands onto FFWD hubs, with 24 front and 28 rear Sapim CX-Ray spokes and DT Pro Lock Brass nipples. The FFWD hub has a 11 speed Shimano freehub body that comes with the spacer so you can put a 10 speed cassette on it. These wheels include exclusive wheel bags, quick release set, valve extensions, brake pads & rim tape. The Control wheels are also an option for Cyclocross and Tandem use.