The Aliante R3 is slightly heavier than the R1, but still features the same shape & sleek design as the R1. The composite glass shell with co-injected nylon Twin Flex™ sweet spot at the centre, & their K:IUM rail, make this a lighter & stiffer alternative to the Aliante R3 Braided, R3 K:ium, R5 K:ium & Gamma models, whilst not compromising comfort. Integrated Clip System The Integrated Clip System (ICS) is an integrated interface in the saddles base to allow quick attachment & removal of ICS accessories such as the Fizi:k saddle Pa:k & Blin:k light. It is a clean, easy, fast & secure attachment that does not require any tools. K:IUM Rails K:IUM is a fizi:k proprietary rail formulation. Its the combination of a particular metal alloy, a specific tubular design & a special finishing process which increases fatigue performance on the rail surface. Fact: 8% weight reduction compared to solid titanium. K:IUM features a high strength-to-weight ratio grade & high corrosion resistance. Twin Flex Technology Twin Flex construction combines two layers within the shell. A layer of multi-directional carbon fiber provides strength, while a bi-directional layer allows flex for comfort. The two layers are moulded together, so that the stiffer outer layer controls the flexibility of the inner layer. Aliante Carbon is for The Bull: Rigid Spine If you have a relatively low degree of spinal flexibility (more than 90 degrees between your straight legs & back when bending over as far as you can, keeping your legs straight a shoulders’ width apart), you are a Bull. Your degree of Spinal flexibility will top out quite quickly when attempting to adopt the performance position. For this reason you will rotate you pelvis fully & will benefit from the increased curvature (support) of the Aliante shape.