Torsion bar – Sprint Car – 30" long – tubular – 1.015 rate – left front or right rear
Category: Sprint Car Torsion Bars (Tubular)
Maximize your chassis platform stability with this ultra-heavy 1.015” rate tubular torsion bar. At 30” in length, this bar is engineered for elite Sprint Car teams requiring maximum resistance to chassis roll and bottoming on high-grip, high-speed tracks. The tubular construction allows for an extreme spring rate without the massive weight penalty of a solid bar, ensuring your unsprung weight remains low for superior tire compliance.
Performance & Fitment
Application: Sprint Car (Winged or Non-Wing)
Position: Left Front (LF) or Right Rear (RR)
Rate: 1.015
Length: 30”
Construction: Tubular (Hollow). By utilizing a large-diameter hollow design, this bar achieves massive resistance while maintaining a faster "rebound speed" than solid alternatives, helping the tire return to the track surface more quickly.
Tuning Profile: * As a Right Rear bar: This is a specialized choice for heavy "hooked-up" tracks or high-banked half-miles where the car is under extreme centrifugal load and requires maximum support to maintain ride height.
As a Left Front bar: It provides an ultra-stiff foundation to control front-end dive, keeping the wing at a consistent aerodynamic angle during high-speed corner entry.
Premium Construction
Material: Manufactured from high-strength, aircraft-grade alloy steel, through-hardened for maximum torsional resilience.
Precision Manufacturing: Centerless ground to a strict 1.015" tolerance. This ensures uniform wall thickness, which is mandatory for a tubular bar to provide a perfectly linear and repeatable spring rate.
Heat Treatment: Advanced processing maximizes "memory" retention, ensuring the bar returns to its original index and resists sagging during grueling features.
Finish: Precision-machined splines ensure a zero-play interface with your torsion arms and stops for instant chassis feedback.
⚠️ Critical Fitment Exceptions
A bar of this diameter and rate requires extreme attention to detail during installation and maintenance:
❌ Critical Tube Clearance: At 1.015", this bar is physically very large and occupies almost all the space inside a standard torsion tube. Your chassis tubes must be perfectly straight and surgically clean. Any internal rust or mud will cause the bar to bind, creating an "infinite" spring rate that causes the car to "skate" or bounce uncontrollably.
❌ Shock Valving Requirements: The 1.015" rate has an incredibly high return frequency. You must ensure your shocks (specifically rebound) are valved heavily enough to control this bar. Without proper damping, the car will "pogo" off the corners, destroying traction.
❌ Internal Bore Care: Hollow bars are susceptible to internal corrosion from trapped moisture, which can lead to sudden stress fractures. Keep the internal bore clean and lightly oiled or use protective end caps.
❌ Length Verification: This is a 30" tip-to-tip bar. Ensure your chassis is designed for 30" bars; many standard Sprint Cars utilize 29" bars.
❌ Directional Indexing: This bar is indexed specifically for the Left Front or Right Rear. Installing it on the "wrong" side (RF/LR) will cause the bar to yield (sag) almost immediately as it twists against its intended grain.
❌ Hardware Stress: The torque generated by a 1.015" bar is immense. Inspect your torsion arms for "egging" or spline wear; the massive loads can shear standard or worn aluminum hardware.
What’s Included
- One torsion bar
Warranty
Backed by a 1-year warranty for peace of mind.
16 in stock (can be backordered)