Eibach ERS Platinum 18 in. Rear Racing Spring, 3.50 in. Outside Diameter, 850 lb/in. Rate – P1800.350.0085

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 rear racing spring is engineered for demanding motorsports applications where consistent performance, reduced weight, and predictable suspension behavior are essential. Part number P1800.350.0085 features Eibach’s proprietary ultra-high-tensile-strength steel, providing increased spring travel and deflection compared with standard racing coil springs.

Designed to maintain its dimensions and spring rate within extremely tight tolerances, this Eibach Platinum spring delivers dependable performance lap after lap and race after race. The flat-ground end configuration uses parallel tolerances of plus or minus 1 degree for precise seating and consistent load distribution. Its block-resistant construction helps prevent loss of spring height, supporting reliable suspension setup and ride-height control throughout extended competition use.

• Feature: Ultra-high-tensile-strength steel reduces physical weight while supporting increased spring travel.
• Feature: Tight dimensional and rate tolerances help maintain consistent performance during repeated racing cycles.
• Feature: Flat-ground ends with parallel tolerances of plus or minus 1 degree promote precise spring seating.
• Feature: Block-resistant construction helps prevent spring-height loss under demanding loads.

Product Specifications and Technical Data

• Brand: Eibach
• Series: ERS Platinum
• Part Number: P1800.350.0085
• Application: Rear racing coil spring
• Spring Rate: 850 pounds per inch
• Outside Diameter: 3.50 inches
• Free Length: 18 inches
• Construction: Ultra-high-tensile-strength steel with flat-ground ends

What’s Included

• One Eibach ERS Platinum rear racing spring

Fitment should be verified against the vehicle’s suspension design, spring dimensions, required rate, and racing setup before installation. This product is intended for automotive motorsports use. California Proposition 65 warnings may apply.

Features:

• Ultra-high-tensile-strength steel construction provides reduced weight and increased spring travel.
• Tight dimensional and spring-rate tolerances help deliver consistent performance lap after lap.
• Flat-ground end configuration with parallel tolerances of plus or minus 1 degree supports precise seating.
• Block-resistant design helps prevent loss of spring height under demanding racing loads.

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