45NRTH XL Studs (pack 25)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 Sold in a pack of 25 XL Stud features