Campagnolo shamal ultra c17 rear road wheelthe new shamal ultra c17 continues the legendary performance this model has held for over 20 years'. '.strtoupper('i')t's the first top for many top end competitive cyclists in all areas of the sport'. '.strtoupper('t')his version pushes performance further thanks to the increase in design and technology campagnolo is known for.optimised rim profilethis version of the shamal ultra features the new c17 rim profile to ensure a better rim to tyre interface, which in turn improves performance'. '.strtoupper('t')his performance boost is especially noticeable when using 25 and 28c road tyres the modern standard'. '.strtoupper('t')o maintain this wheel exceptional reactivity and momentum it has been equipped with usb ceramic, sealed cartridge bearing, which although reducing weight, also greatly improve rolling performance and smoothness'. '.strtoupper('c')eramic ball bearings have a high corrosion resistance, meaning wheel maintenance is rarely required.podium proven performancethis wheel features the campagnolo iconic, performance enhancing mega g3 spoke lacing pattern'. '.strtoupper('t')his spoke pattern improves energy between the rider and the road, which reduces stresses on the drive side right side of the wheel while increasing the rigidity of the wheel overall at the same time'. '.strtoupper('t')his significant performance enhancement is achieved by the drive side of the rear wheels having twice as many spokes as the non drive side left side.hand built and fine tunedcampagnolo wheels are hand built entirely by specialist campagnolo wheel builders and are fine tuned and checked precisely with electronic tools'. '.strtoupper('t')he ensures that every wheel delivers the high performance output that campagnolo wheels are known for.features  material rim aluminium hub carbon, aluminium  rim internal width 17mm  rim external width 22mm  rim profile differentiated, 27 30mm  hub spacing 130mm  spoke count 21  spoke lacing g3  bearings usb, cup and cone  freehub 10, 11 speedbuy campagnolo wheels tyres from chain reaction cycles'. '.strtoupper('r')ide'. '.strtoupper('e')at'. '.strtoupper('s')leep'. '.strtoupper('r')epeat.