The aluminium rims have an inner rim width of 17 mm (perfectly suited to 25 mm tyres), a differentiated front and rear depth profile, 27 mm on the front and 30 mm on the rear. Ceramic Ultra Smooth Bearings (USB) in a carbon hub on the front and an aluminium hub on the rear offer an incredibly low friction coefficient. The graphics have been updated too, with dark reflective decals for maximum safety when riding in low light conditions whilst maintaining a stealthy look in daylight hours. This is a wheelset that excels uphill and in mixed conditions, thanks to the renowned reactivity of the Racing Zero family.