Best Overall Comfort/ Sit-Bone Support & UCI Compliant Main Differentiators: Ultimate comfort with cutting-edge 3D technology Narrower Front, for more clearance and narrower positioning Durable & Strong (easy to clean) Filters out vibration Ultra lightweight UCI Length Compliant Road, e-bike, time trial. Best for Aero position Please note that the 3D saddles have a more gripped surface texture to help keep you planted while riding. Specs: Adjustable Sit Bone width 100-175mm Saddle weight Chromoly 347g Titanium 335g Carbon Fiber 296g Saddle Length: 243mm Rail Specs: Chromoly / Titanium - 7mm round Carbon Fiber - 7mm x 9mm oval BENEFITS: Pain free rides Our saddles eliminates pain, numbness, discomfort, saddle sores, and genital injury Helps you ride further faster FEATURES: BiSaddle is the world’s only adjustable shape saddle. (PATENTED) The split-saddle design can change its width, angle, and profile to fit your unique body. If your riding style or body shape changes, you can simply re-adjust for ultimate comfort. All components are replaceable making it the last saddle you'll ever need to buy. How to Choose Your Frame? Cyclist Weight Limits: Chromoly Frame: 280 lbs. Titanium Frame: 240 lbs. Carbon Fiber Frame: 210 lbs. The Carbon Rails are not meant for MTB and Gravel. It is best for Tri and Road. It is super light and has a rider weight limit of 210 pounds.The BiSaddle Chromoly and Titanium rails are round and will fit all seat posts including side clamp, top clamp and stationary bikes (Peloton). The BiSaddle carbon fiber frame has oval rails and will only fit top clamp seat posts or posts specifically made for oval rails. Lifetime Warranty Lifetime materials and workmanship warranty on the chassis. lifetime warranty on the base frame against manufacturer defects 1 year warranty on the surface padding