Schwalbe smart sam mtb tyre raceguardthe smart sam is the ultimate all rounder it features a modern, refined tread design that has been optimised to ensure the central tread provides exceptional rolling performance and comfort while the side lugs guarantee off road grip and traction, even when leaning far into corners. This tyre is reliable and efficient in all conditions, it even inspires confidence on very wet trails and roads.features compound addix performance, dual bead wire skin lite execution raceguard casing 67 tpi inflation pressure 30 55 psi weight 680gtechnologies performance line schwalbe performance line tyres are excellent quality for intensive use. They are the best value for money tyres in schwalbe's range. Addix performance this compound, although being the best value for money, is still very durable, very versatile and provides excellent rolling performance and grip. Similar to addix speedgrip, it is a universal compound, suited to most riding scenarios but the main difference being that they are not quite as light or as fast as tyres from the evolution line. Buy schwalbe wheels tyres from chain reaction cycles, the world's largest online bike store.