Trail Gears Dirty 30 Birfield Axles shafts and birfield housing are made out of 100% 4340 chromoly steel and are precision polished to remove any imperfections that may cause stress risers and failures.�The internals of our Dirty 30 birfields are made out of 300M chromoly steel for maximum strength and reliability. The Dirty Thirty Axles also have a larger size axle shaft going into he birfield to eliminate the weak link in the assembly.
With over a decade of experience, Trail-Gear has been developing, designing and distributing products for adventurous off-roaders and especially wheelers into rockcrawling. Located in Fresno, California, the company specializes in suspension-related parts and accessories including bumpers, armor, axles and drivetrains. The company's employees live and breathe the off-roading lifestyle and Trail-Gear strives to keep their products affordable without cutting corners on design and quality. When you need suspension systems, recovery and towing accessories or lighting solutions, Trail-Gear can outfit you for the trail and beyond. Shop Trail Gear Now