Selle Italia: The SLR Boost improves and renews the values of a great classic like the SLR. The perfect combination of comfort and performance, which has always distinguished this model, is further underlined by a compact shape and an unprecedented lightness.NEW TIP SHAPE AND VISIBLE SHELLThe SLR Boost, in addition to the traditional Superflow, has an even more accentuated front exhaust that allows you to further increase the comfort during the thrust and to make the most of the characteristics of the saddleBIOMECHANICAL REFERENCE POINTSLR Boost features a glossy black line applied to the lower part of the bodywork which indicates the position of the BRP (Biomechanical Reference Point). The BRP is the point where the seat’s width is 70 mm and from which we measure the useful parameters for the right positioning. WEIGHT: S 158g / L 163gCOVER: Fibra-TekSIZE: S 130 x 248 mm / L 145 x 248RAIL: TI316 Tube Ø 7 mm