Limited edition Shimano Dura-Ace FC-7800C hollow Carbon crankset originally retailed at £699.99. This limited FC-7800C chainset was developed specifically for the 7900 series 10-speed current generation groupset. This chainset was briefly fitted to my bike covering approximately 300 miles of use and is in excellent un-worn condition, but is now back in its original box. This carbon chainset looks much the same as the aluminium version, almost as though they just wrapped a layer of carbon over the top, this is not the case. Shimano's Dura Ace FC-7800C is carefully wrapped leaving hollow arms around aluminium inserts at key interfaces, the spider, the pedal threads, and the left arm's clamping area. In testing Shimano found this maximised the strength to weight ratio and also helped increase the rigidity they demand while still decreasing weight. The right hand crank is fixed to a steel billet spindle (the steel spindle has been found to be lighter and stiffer than aluminium options). This chainset is compatible with all of Shimano's proven current road HollowTech II external bottom bracket cups including press fit. Weight for the complete chainset and bottom bracket is a svelte 709g (external BB); the chainset on its own comes in at 609g. Even with this weight loss the end result is a chainset that is a full 10% stiffer than the aluminium version, which was already well known for its exceptional stiffness. This state-of-the-art chainset has anodized black CNC-machined 53/39T chainrings with a crank arm length of 172.5 mm.
£399.99 (plus postage if mailed £12.00, UK only) Please contact Peter on email: petergriffiths020 [at] btinternet.com