Fi'zi:k Kurve Bull Alloy Mobius Saddle. The Fi'zi:k Kurve Bull Alloy Mobius saddle is a twin marvel of engineering and design excellence that delivers the highest level of performance and comfort. The Kurve utilizes Fi'zi:k's Spine Concept system that keys off of a rider's flexibility to determine optimal saddle shape from one of three options Snake, Chameleon, and Bull. This particular saddle is the Bull edition which features a waved and wide shape for those with the least level of flexibility on the Spine Concept scale. For a racing weight saddle, the Kurve also features exceptional comfort via the Wing Flex and Twin Flex design elements. The Wing Flex enables the saddle sides to flex for optimal freedom of movement in the pedaling motion while the Twin Flex shell creates a flexing hammock to relieve pressure and ensure hour after hour of sweet relief. For further customization of the saddle, two tuners situated underneath the tip of the nose enable a rider to dial in saddle flex to their preferred level. Additionally, the cold forged aluminum Mobius rails are lightweight and absorb shock. All in all, the Fi'zi:k Kurve provides a saddle experience like no other.