Dana Inc.'sUltimate Dana 80 Bracketless Crate Axlescan be installed in virtually any application and feature 4" tubes with 5/8" wall thickness with Spicer 40 spline SAE-4340 nickel chromoly steel axle shafts. The axles also include a Spicer performance ring and pinion gears in ratios 3.73-5.38. Built for strength and durability for larger tires, Ultimate Dana 80 offer a full-float design and a heavy-duty 8" by 6.5" wheel bolt pattern and a Spicer 1410 strap-style/half-round end yoke.