Eibach ERS Platinum 18-Inch Rear Racing Spring, 3.50-Inch Outside Diameter, 115 lb/in, Part Number P1800.350.0115

Eibach PLATINUM series race springs are engineered using our proprietary ultra-high tensile strength steel, for the lowest physical weights and maximum spring travel. More Travel / Deflection than Standard Racing Coil Springs

• The Eibach ER Platinum Springs will Maintain Their Dimensions and Rates to Incredibly Tight Tolerances, Lap after Lap, Race after Race
• Flat-Ground End Configuration with Parallel Tolerance to +/-1 Degree
• Ultra Light-Weight Using High Tensile Steel
• Block Resistant - No Loss in Spring Height!

The Eibach ERS Platinum Series rear racing spring is engineered for competitive motorsports applications that demand consistent performance, low weight, and reliable spring behavior under repeated high-load conditions. Constructed from Eibach’s proprietary ultra-high tensile strength steel, this coil spring is designed to provide increased travel and deflection compared with standard racing coil springs while supporting precise suspension tuning.

Designed for race use, the Eibach ERS Platinum spring maintains its dimensions and spring rate within exceptionally tight tolerances lap after lap and race after race. Its flat-ground end configuration and precise parallel alignment promote consistent seating and predictable suspension response. The spring’s 115 lb/in rate provides a firm, competition-focused setup for applications requiring controlled chassis movement and repeatable handling characteristics.

• Feature: Ultra-high tensile steel construction reduces weight while supporting high-load racing performance.
• Feature: Increased travel and deflection compared with standard racing coil springs help maximize suspension movement.
• Feature: Tight dimensional and rate tolerances help maintain consistent performance throughout repeated race use.
• Feature: Block-resistant design helps prevent loss of spring height during demanding operation.

Specifications and Technical Data:

• Brand: Eibach
• Series: ERS Platinum
• Part Number: P1800.350.0115
• Application: Automotive racing suspension
• Spring Position: Rear
• Spring Rate: 115 lb/in
• Outside Diameter: 3.50 inches
• End Configuration: Flat-ground ends with precision parallel alignment

What’s Included: One Eibach ERS Platinum rear racing spring.

Fitment: Vehicle-specific fitment information was not provided. Verify spring diameter, free length, spring rate, suspension position, and coilover compatibility before installation. This product is intended for automotive racing applications and may require supporting suspension components or professional setup.

Features:

• Ultra-high tensile steel construction delivers low weight with strong resistance to demanding racing loads.
• Provides more travel and deflection than standard racing coil springs for increased suspension movement.
• Maintains spring dimensions and rate within tight tolerances for consistent lap-after-lap performance.
• Block-resistant design helps preserve spring height during repeated high-load use.

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Units Per Sku: 1