Surron swing arm & jackshafts are now made from heat treated & precision ground 4340 steel. Made with 4340 steel and vacuum hardened for maximum strength, compared to all other methods. It won't bend, break, or snap - even under extreme conditions. Backed by a lifetime warranty, this bolt is designed to offer maximum performance and durability every time. Note* All 4340 shafts are precision centerless ground after heat treat, due to Black Zinc Plating altering material properties, we left these shafts with a Raw silver finish to maximize strength and increase shaft to bearing tolerances over any aftermarket bolt on the market! Turned from 4340 steel Flawless Raw centerless ground surface Heat treated by vacuum hardening for maximum strength durability, and hardness. Precision ground diameter to bearing manuf. recommended tolerance. M10x1 flange style nut included (Black Titanium Fuji Nut optional) 10MM hex on shaft. MADE IN CALIFORNIA USA
