Hyperco Pull Bar Spring, 700 lbs/in, 5″ I.D. x 7″ Free Length, PB Series

Hyperco Pull Bar Spring — 700PB

The Hyperco 700PB is a pull bar spring built for the pull bar (or lift bar) in a dirt late model or modified rear suspension, where it manages rear axle torque reaction under acceleration and helps put power down off the corner. Like all Hyperco pull bar springs, it is a 5″ outside diameter design.
Hyperco holds these springs to tight rate-linearity tolerances — within 2% through the middle of their travel (roughly 20% to 60% of deflection) and within 6% deeper in the stroke (about 61% to 80% of deflection) — so the spring behaves predictably as it loads. They are also built to hold their free length and rate over an extremely long service life, so the spring you tune with stays the spring you race with.

Specifications

Notes

• 5″ outside diameter pull bar spring, PB series.
• Rate linearity: within 2% from 20–60% of deflection; within 6% from 61–80%.
• Maintains free length and rate through a near-infinite operational life.
• Precision-wound and rate-tested, made in the USA.
• Sold individually.