ARP Wheel Studs

If you have wheel spacers, extra-thick wheels, or you just want longer studs so it's easier to swap wheels at the track, we've got you covered. ARP stock-thread-pitch (1.25) wheel studs for all Subaru models are hardened heat-treated 8740 chrome moly steel, with a tensile strength of 200,000 psi. Bullet nose design on the longer studs makes for easy thread starting and sliding wheels on over them is a cinch. Cadmium plating gives extra durability. There are three lengths. The "stock" size is a few mm longer than stock. Medium size is  20-23mm longer than stock. The long size is 33-35mm longer than stock. Note that stock studs vary in length for different models. Stock: Underhead length 44mm. Thread length 31mm. About 1-3mm longer than stock Subaru studs. Standard nose. Medium: Underhead length 63mm. Thread length 45mm. Bullet nose. Long: Underhead length 76mm. Thread length 53mm. Bullet nose. Just by way of comparison, a stock Subaru stud from a 2008+ WRX/STI has an underhead length