Torsion Bars
Race-Ready Torsion Bars for Consistent Speedway Performance
When your setup lives on the edge of grip, the right torsion bar is the difference between a car that chases the track and a car that controls it. Ian Boettcher Race Parts (IBRP) supplies high-performance torsion bars for sprint cars and speedway applications, sourced from leading manufacturers and chosen for repeatable rate, durability under heat, and sharp on-track response. Whether you’re dialing in the car for a slick feature or attacking a hooked-up surface, our bars deliver predictable spring rate so you can fine-tune balance, drive off the corner, and keep tyre temperature in the window. From hot laps to the last restart, the aim is confidence—consistent feel over a full race distance and the stability to commit to your line.
Engineered from premium spring steels and available in popular diameters and lengths, our torsion bars are designed to hold rate across heat cycles and resist set, giving you the same feel at lap 25 as you had at lap five. Surface finish and precise straightness help minimise friction and stiction in the tube, which improves sensitivity to small inputs and makes your shock package work more effectively.
Choosing the Right Torsion Bar for Your Sprint Car
Selecting a torsion bar starts with honest goals and a clear picture of your car’s behaviour. If you need more drive on exit without upsetting entry, you may step softer on the rear to plant the tyre while maintaining a firmer front to hold attitude through turn-in. On heavier tracks, a stiffer package can sharpen response and keep the car on top of the surface; on slicker nights, a softer combination can free the chassis and improve forward bite. Rate changes of a few thousandths in bar diameter can make a meaningful difference, so keeping a small range in your trailer allows you to tailor the balance to conditions without over-complicating the setup. Indexing matters as well—consistent starting angles and careful ride-height checks make your adjustments repeatable, and regular bar rotation helps maintain even wear across the season.
IBRP’s team can help you match torsion bar rate to your shocks, tyre choice, wing configuration, and driving style, ensuring the car responds as expected when you adjust stops, arms, and cross measurements. If you’re chasing a more compliant feel over bumps, we’ll point you toward bars with the characteristics to keep the tyre connected; if you’re looking for a crisper front end, we’ll suggest a step in rate or material spec that tightens platform control without making the car nervous.
Shop online to compare diameters, lengths, and material specs, or visit us in store for in-person support. Whether you’re refreshing a proven combination or starting a new build, IBRP will supply torsion bars that hold their rate, respond cleanly to changes, and turn your setup notes into speed. Race with confidence—fit torsion bars from Ian Boettcher Race Parts and feel the difference every time you turn the wheel.
FAQ's
What does the torsion bar do?
A torsion bar is a spring that works by twisting rather than compressing, converting wheel movement into controlled rotational resistance so your suspension can manage bumps, curb strikes and weight transfer without letting the chassis roll excessively; one end anchors to the chassis and the other connects to a torsion arm on the suspension, so when the wheel rises the bar twists, stores energy and then releases it to settle the car back to neutral, which keeps tyres planted, steering precise and platform attitude consistent through entry, mid-corner and exit; in speedway and sprint car applications, a correctly chosen torsion bar rate improves front-end response, rear drive and overall balance by matching the bar’s stiffness to shocks, tyre compound and track grip, while high-quality spring steel, accurate straightness and a smooth surface finish help the bar hold its rate across heat cycles, reduce stiction in the tube and let your dampers do their job, delivering repeatable feel over a full race distance.
Can you adjust ride height with torsion bars?
Yes. Ride height and corner weight on torsion-bar cars are adjusted by indexing or preloading each bar, which means rotating the bar or changing the stop position to add or remove twist at static height so a corner rises or lowers and the cross weight shifts accordingly; because this process is precise and repeatable, you can make small, strategic changes to sharpen turn-in on a heavy track, free the car up as conditions slick off, or fine-tune rear bite on exit without upsetting overall balance, provided the base bar rate is appropriate for your chassis, wing configuration, shock valving and tyre choice; the key is to measure carefully, keep arm angles and ride heights symmetrical, recheck cross after each change, and use minimal preload to hit targets.
