Ritchey trail mountain bike seatpostone of the lightest and toughest aluminium models on the market, the trail mountain bike mtb seatpost is the perfect addition to your modern hardtail or full suspension machine. To make installation easier and to ensure an efficient grip of your saddles rails, ritchey has angled the clamp heads bolts inwards. Plus, as your saddle flexes, the low profile top plate of the clamp head prevents contact with the underside of your saddle for consistent comfort. Finally, its 5mm setback puts you in the ideal riding position for your mixed terrain rides.features material 6061 2 piece aluminium diameter various sizes available length 400mm offset setback 5mmsaddle rail compatibility round rails, 7x7mm use mtb, hybrid, touring bikes two bolt design for easy to adjust, vice like grip on saddle rails low profile clamp reduces stress on lightweight rails and won't bottom out bolts oriented to the axis of the rails for the greatest contact area with the saddleweight 350gbuy ritchey components from chain reaction cycles, the world's largest online bike store.