Continental Ruban ShieldWall 29 x 2.30" PureGrip TLR Folding Bike TyreContinental Ruban ShieldWall 29 x 2. 30" PureGrip TLR Folding Bike Tyre The energy saving SUV all rounder that takes you on rural roads as well as in the city. The cheaper variant relies on the Contis PureGrip Compound and the new ShieldWallSystem, which provides puncture protection. Handcrafted for you. Features: Pure Grip Compound: Based on the activated silica compound, we worked purposefully towards a compound technology in the performance