Torsion Bars
Torsion bars for sprint car and speedway suspension, available in a range of diameters, lengths and spline configurations to suit Midget and Sprint applications. The bar twists rather than compresses, giving the suspension a spring rate that resists chassis roll and controls weight transfer through the corner.
Rate is set by diameter, so a softer bar (lower rate number) gives a more compliant, forgiving feel while a stiffer bar sharpens response on heavier, higher-grip tracks. Schroeder Midget bars here run 26" or 28" with 1" spline in rates from .700" to .850", and Sprint bars run 30" with 1-1/8" spline. Matching bars front to rear, and to your shocks and track conditions, is how most teams fine-tune balance.
Frequently asked questions
What does a torsion bar do?
It's a spring that works by twisting rather than compressing. One end anchors to the chassis and the other connects to the suspension arm, so as the wheel moves the bar twists and resists, controlling body roll and weight transfer.
How do I choose a torsion bar rate?
A softer (lower rate) bar gives a more compliant feel and can help on slicker tracks, while a stiffer bar sharpens response on heavier, higher-grip surfaces. Many teams keep a small range of rates on hand to adjust for track conditions.
Can ride height be adjusted with torsion bars?
Yes, by indexing or preloading the bar, meaning you rotate it or change the stop position to add or remove twist at static height. This lets you adjust corner height and cross weight without changing the bar itself.
What's the difference between the Midget and Sprint bars in this range?
Midget bars are typically 26" or 28" long with a 1" spline, while Sprint bars run 30" with a larger 1-1/8" spline, reflecting the different chassis and load requirements of each class.
