XL Concave Carbide Aluminum Tire Studs – Pack of 300

45NRTH XL Concave Carbide Aluminum Studs: Pack of 300. 45NRTH utilizes a two-piece construction method to create a reliable and high-performing bicycle tire stud featuring a concave carbide-aluminum design. The super-sized concave crown creates open space and inside edges of the bowl resulting in twice the surface area for increased traction and grip.