Off-road racing demands consistency, durability, and precise spring control. The Eibach Racing Off-Road (ERO) Spring System is engineered to withstand extreme abuse while maintaining accurate spring rate and free length.

From desert racing to rock crawling, ERO springs are race-proven in events like:

• Baja 1000
• Dakar Rally
• King of the Hammers

These springs deliver maximum travel, minimal block height, and repeatable performance in both single-rate and dual-rate coilover setups.

3.75 I.D. Specific Details

Available in a silver powder coated finish, ERO 3.75 I.D. coil springs are offered in a wide range of spring rates rom 200lb/in to 500lb/in

Built with the highest quality materials, these springs are strong, consistent, and engineered for long service life under extreme off-road conditions.

Includes:

• (1) Eibach ERO Coil Spring (selected rate)

Sold Individually

Specifications

General ERO Line:

• Inside Diameters: 3.75
• 3.75 ID Length Range: 16"
• Spring Rates: 200500 lb/in
• Finish: Silver Powder Coat
• Individually Rate Tested

Material & Manufacturing:

• Material: Chrome Silicon Steel (CrS)
• Manufacturing Process:
  • Cold Wound
  • Heat Treated
  • Shot Peened
• Ends: Squared & Ground at Both Ends
• Coating: Protective Silver Powder Coat

Fitment

Universal fitment for:

• 3.75 coilover shocks
• Dual-rate coilover setups
• Rock crawlers
• Ultra4 race builds
• Desert trucks and prerunners
• Rock bouncers

Verify inside diameter matches your coilover body and spring hardware.

Tech Insight

Race-Proven Durability

ERO springs are engineered to maintain rate and free length even after repeated full compression cycles. They are designed to handle:

• Extreme suspension cycling
• High heat environments
• Heavy unsprung weight
• Continuous race abuse

Block-Stable Design

In dual-rate setups, the tender spring is often designed to fully compress (block) to transition into the main spring. ERO springs are built to:

• Safely block repeatedly
• Maintain consistent transition points
• Resist sagging or rate loss

Precision Manufacturing

Every spring is:

• Individually tested
• Manufactured to precise tolerances
• Built for maximum linearity and repeatable performance

Squared and ground ends ensure straight, consistent operation and accurate preload setup critical for corner balancing and fine suspension tuning.