Selle Italia SLR Boost Kit Carbonio Saddle 248 x 145mm Unisex 143g ModelNumber=J2594 Details here on the 148mm

Details here on the 148mm Boost spacing

Deep Peri-Canal - Continuous relief channel from tip to tail

Axle Type 12mm TA Position Rear Primary Color Black Hub Drilling 24H Hub Weight 217g Freehub Body Shimano Micro Spline Hub Spacing 142mm Hub Spoke Type Straight Pull Rotor Mount Center Lock

Rings 48/35Number of Chainrings DoubleDrivetrain Speeds 12Chainring BCD Direct Mount SRAM 8-BoltChainline/Hub Compatibility 135/142 Road Disc Hubs < 415 mm ChainstayChainline/Hub Compatibility 135/142 Road Disc Hubs > 415 mm ChainstayColor BlackCrank Length (mm) 175Crank Intended Use RoadBB Included NoPedal Spindle 9/16"Spindle Interface Type SRAM DUBDefined Color Black

Selle Italia SLR Boost Kit Carbonio Saddle 248 x 145mm Unisex 143g ModelNumber=J2594 Details here on the 148mmSelle Italias lightest short saddle Boost short nose improves thigh clearance, saddle fit and reduces weight No cut out, improves support for cyclists who have a limited pelvic rotation Carbon infused shell ensures low weight and durability Fibra Tek cover, made from a strong, highly durable and lightweight technical microfiber material CarboKeramic rails, made from ceramic coated carbon, offer low weight and superior clamping resistance Weight: S: