The SPT carbide stud is designed for the rider who wants to ride safely with the extra confidence that only traction products provide. This stud is a true value that will make it an easy decision to stud-up. The “SPT” features a 5/16" shank, 80° degree carbide. Its large 15/16 headsize is designed to reduce track wear, and thru hardened for its proven strength. Its zinc finish will provide a longer life and resist corrosion. Lock-nut included.