Hyperco 1.68″ I.D. x 4.25″ Free Length Quarter Midget Coilover Spring, Q Series, 75-150 lbs/in Rate (Choose Rate)

Hyperco 1.68″ I.D. x 4.25″ Free Length Quarter Midget Coilover Springs — Q Series

Hyperco’s Quarter Midget Hypercoil springs are built for the demands of today’s quarter midget racing, from first-year novices through to seasoned national-level competitors. The line was shaped with feedback from the sport’s leading chassis builders and held to tight manufacturing tolerances, so tuning stays consistent and predictable across the full range of track conditions a quarter midget sees. Every Hypercoil spring also uses Hyperco’s exclusive OBD (Optimum Body Diameter) design, which tailors the spring’s body diameter relative to its end coils to get the most out of each spring. If you are chasing results in the quarter midget class, Hyperco’s Hypercoil springs give you a proven tuning tool to build on.
These Q-series springs are wound in a 1.68″ (42.7 mm) inside diameter and 4.25″ (107.9 mm) free length, with closely-spaced rates that step in increments as small as 5–7 lbs/in — letting you dial corner rates precisely as track conditions change through a race day. Precision cold-wound from high-tensile chrome-silicon wire, heat-treated, preset and 100% rate-tested, so the printed rate is the delivered rate. Made in the USA.
Select your spring rate from the drop-down. Every spring in this listing shares the same 1.68″ I.D. and 4.25″ free length; only the rate and its associated deflection, load and coil dimensions change.

Rate Chart

Specifications

• Inside diameter: 1.68″ (42.7 mm)
• Free length: 4.25″ (107.9 mm)
• Series: Q (Quarter Midget)
• Rate range: 75–150 lbs/in
• Finish: Blue powder-coat
• Features Hyperco OBD (Optimum Body Diameter) technology
• 100% rate-tested, made in the USA
• Sold individually.