Handcrafted 6061-T6 aluminum extended swingarm Proprietary custom extrusion made exclusively for Brock's Performance Extends wheelbase from stock to 3 inches over 3-position shock mounts allow flexibility in ride height (stock, -1”, -2”) Designed for use in high-power, high-torque applications Includes centerless ground 4130 Chromoly axle (choose from 3/4”, 25mm, 1”, or 28mm axles) Reversible billet aluminum axle adjusters for easy wheel adjustments Includes adjustable brake bar for undermount (aftermarket) brake caliper PTFE® lined spherical bearings from Worldwide Bearings preinstalled Includes bushings to use the OEM pivot shaft (choose from 5/8” or 3/4” bushing sets) Interior swingarm width measures 10 1/4” at the axle The total weight of swingarm, hardware, and axle is 14.32 lb. (6.50 kg) (see the 'Technical' tab for details) Designed, machined, and assembled in the USA Burnished raw aluminum finish PLEASE NOTE; THIS IS NOT A BOLT-ON INSTALLATION, REQUIRES AFTERMARKET BRAKES AND CUSTOMIZATION. STANDARD SWINGARM WILL COME WITH THE 3/4" REAR AXLE AND 5/8" PIVOT SHAFT IF YOU WOULD LIKE A DIFFERENT AXLE OR PIVOT SHAFT OPTION PLEASE LET US KNOW WHEN PLACING YOUR ORDER.