The 45-inch AntiRock sway bar torsion bar from RockJock Off Road is designed for rear sway bar applications and universal builds that demand increased roll control without sacrificing articulation.

AntiRock torsion bars are available in multiple lengths and center diameters to allow builders to tune sway bar rate as vehicle weight, suspension geometry, and use evolve. With all other factors equal, a larger center diameter results in a stiffer effective bar rate, making diameter changes the most efficient way to fine tune handling.

This bar measures 45 inches tip to tip and features a .800-inch center diameter, paired with standard 1-inch OD ends and 25 splines. For maximum strength and fatigue resistance, each bar is forged and heat treated from 4340 chromoly, the same material used in professional off-road racing sway bars.

Includes:

• (1) AntiRock sway bar torsion bar
• 45 in. long .800 in. center diameter 25 spline

Specifications

• Length: 45 in. (tip to tip)
• Spline Count: 25 spline
• OD (Splines & Bushing Surface): 1.000 in.
• OD (Center of Bar): .800 in.
• Material: Forged & heat-treated 4340 chromoly
• Threads (Bar Ends): 5/16 in.-24 1-1/8 in. deep
• Finish: Semi-gloss black powder coat
• Splines and bushing surfaces masked

Fitment

• Universal application with 25-spline AntiRock arms
• Commonly included in:
• TJ Wrangler Rear AntiRock Sway Bar Kits
• TJ Wrangler Unlimited (LJ) Rear AntiRock Sway Bar Kits
• CE-9902 Series Universal AntiRock Sway Bar Kits

Tech Insight

A .800-inch center diameter provides a noticeably stiffer rate than smaller AntiRock bars, making it ideal for rear applications where additional roll resistance improves stability at speed while maintaining off-road articulation. This bar is commonly used in TJ and LJ rear AntiRock setups and is a solid choice for heavier rigs or builds carrying rear-mounted gear.