Axle Size/Strength Chart

Axle Size/Strength

Many variables (vehicle weight, horsepower, tire size, and intended use) go into determining the correct axle spline count for any application. The table below provides a general reference and outlines the relative increase in strength as the spline count increases.

Material Strength

Material	Tensile Strength	Strength Increase
1040 (OEM Stock Axlel)	120,000 psi	N/A
1541H (Performance Axle)	181,000 psi	+ 50% > 1040 (OEM Stock Axlel)
4340 (Chromoly Axle)	228,000 psi	+ 90% > 1040 (OEM Stock Axlel) + 26% > 1541H (Performance Axle)
300M (Full-Float Axle)	290,000 psi	+ 141% > 1040 (OEM Stock Axlel) + 60% > 1541H (Performance Axle) + 27% > 4340 (Chromoly Axle)