P Zero SmarTube sport Crank can be exchanged between

Crank can be exchanged between single and double front chainring set ups

like bells or lights

The Ultralight fits comfortably into lightweight technical shoes for a barely-there feeling

This chainring is equipped with the patent pending Drop-Stop asymmetrical tooth design for the best in wear life

giving you maximum grip

P Zero SmarTube sport Crank can be exchanged betweenP Zero SmarTube is the most advanced inner tube in the range. It was designed to match the need for lightness and handling of professional World Tour riders and its first application was inside the P Zero Race Tube SL. Designed with TPU (Thermoplastic Polyurethane), an advanced plastic material characterized by elasticity and mechanical strength. The result is an inner tube that can be up to 70% lighter, up to 50% more compact and as resistant against