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.

Concave tip for durability and longevity

Aluminum base to save weight

Compatible with the 45NRTH stud insertion tool