Axle 31 Spline 30.5in 1.115in OD

The Axle 31 Spline 30.5in 1.115in OD by Strange Oval is a precision-engineered axle shaft designed for high-performance rear differential applications in custom and modified vehicles. This component serves enthusiasts building or upgrading independent rear suspension (IRS) systems, street rods, race cars, and off-road platforms where OEM axles fall short of performance demands. The 31-spline design provides superior load capacity and torque handling compared to lower-spline counts, making it essential for builds combining high horsepower engines with aggressive acceleration or track duty.

Strange Oval's engineering focuses on material quality and dimensional consistency critical to axle performance. The 1.115-inch outer diameter and 31-spline count are optimized for strength while maintaining compatibility with modern aftermarket differential housings and carrier assemblies. At 7.3 lbs per shaft, the weight reflects solid steel construction without unnecessary material, balancing durability against unsprung weight concerns on suspension-sensitive builds. The 30.5-inch length accommodates mid-length IRS configurations common in late-model conversions and custom chassis applications, allowing proper geometry and brake setup integration without modification.

Buyers upgrading from stock axles—whether transitioning to IRS, increasing engine output, or installing a stronger differential carrier—will find this shaft rated for sustained abuse beyond factory tolerances. Installation requires proper bearing and seal setup within your differential housing; verify spline compatibility with your carrier and wheel hub assembly before purchase. This axle performs best paired with matching quality bearings, seals, and a differential cover designed for your specific housing, ensuring load distribution and longevity in both street and competition environments.