Spark R&D DRex ST Pro Crampons

D Rex ST Pro Hardboot Crampon Our legendary hardboots crampons are lightweight and tough with multiple features giving hardbooters total confidence in dicey terrain. Riser blocks stack and unstack to keep full depth of teeth in the snow when using heel risers. Weight: 5.15 oz/ea (147g) - 10.3 oz/pr (294g) - Regular Compatibility, Sizing, and Setup Recommended for use with Spark x ATK Tech Toes. Also compatible with Dynafit Speed Radical, Speed Turn, and Low Tech toe pieces. 7075 Aluminum Manufactured with 7075 aluminum to be strong, light, and thinner for minimal drag. ST Tech Overmolded ST Axle allows for a smooth and durable touring experience. Nesting Design Nesting design saves valuable space in the pack. Easy Installation Install and remove on the fly by sliding sideways into and out of the crampon claw mounts. Made for the Steeps Stack up the crampon riser blocks to keep the full depth of teeth in the snow when using heel risers.