45NRTH ALUMINUM CARBIDE CONCAVE STUDSAmple Grip On Icy Surfaces For the riders in the world that don't let the weather affect their rides, 45NRTH has their Aluminum Carbide Concave Studs. If you're riding in less than desirable weather with icy surfaces, these concave studs will help to provide excellent grip. 45NRTH utilizes a two-piece construction method to create a reliable and high-performing tire stud. These are compatible with the 45NRTH stud insertion tool. Features Concave tip for durability and longevity Aluminum base to save weight Provides ample grip on icy surfaces | 45Nrth | Aluminum Carbide Concave Studs 100 Pack