Redshift Sports Dual-Position Seatpost More Than One, Less Than Three The patented Redshift Sports Dual-Position Quick Adjust Aero Seatpost lets you ride a true aero position on a standard road bike, without sacrificing your normal road position. Along with the Quick-Release Aerobars, it provides the benefits of a triathlon or time trial bike without the additional bike or price tag. The key to riding powerfully and comfortably is proper saddle position, and since you can switch between road and aero positions on the fly while riding, you can always choose the best riding position for every part of your ride. Features Transform your current bike from road to aero Maintain proper leg extension in both road and aero riding positions Simple, durable two-bolt saddle clamp allows infinite saddle tilt adjustment and reliable clamping Max rider weight: 250 lbs SPECIFICATIONSDiameter27. 2mm Length350mm Offset+34mm, -16mm Material Aluminum Intended Use Road, Aero Weight400g | Redshift | Sports Dual-Position Seatpost 27. 2Mm, 350Mm | Aluminum