Deep Groove Coil-Over Spring Rubber – 5/5.5-Inch

Longacre Deep Groove Coil-Over Spring Rubber – 5″ to 5.5″ Springs, Polyurethane, 0.75″ Height, 1.25″ Thick

Optimize your suspension setup quickly and precisely with the Longacre Deep Groove Coil-Over Spring Rubber, built for racers who demand real-time tuning on the fly. Designed for 5″ to 5.5″ coil-over springs, this durable polyurethane spacer lets you fine-tune spring rates without removing the spring or coil-over unit—perfect for making fast setup changes during practice or pit stops.

With a deep groove profile to sit securely in the spring, these rubbers are trusted by Sprint Cup teams and pro-level race engineers. At 0.75″ in height and 1.25″ thick, they’re built to withstand heat and compression without distortion. Available in three color-coded durometers for tuning flexibility:

• Red – Soft
• Blue – Medium
• Black – Hard

Note: For racing use only.

Key Features:

• Fits 5″ to 5.5″ coil-over springs
• 0.75″ height, 1.25″ overall thickness
• Durable polyurethane construction for repeated use
• Deep groove design for a secure, no-slip fit
• Enables quick spring rate adjustments at the track
• Used by top-level racing teams, including Sprint Cup
• Color-coded hardness: Red (Soft), Blue (Medium), Black (Hard)
• Sold individually
• For racing use only

Ideal for fine-tuning corner handling balance, chassis stiffness, or ride height response without spring changes.