Eibach ERS Platinum 18 in. Rear Racing Spring, 3.50 in. Outside Diameter, 100 lb/in. Rate - P1800.350.0100

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 P1800.350.0100 rear racing spring is engineered for demanding motorsports applications where consistent performance, reduced weight, and extended spring travel are essential. Its proprietary ultra-high tensile strength steel construction helps deliver a lightweight racing spring with greater deflection than standard racing coil springs, supporting improved suspension control over extended track sessions.

Designed to maintain its dimensions and spring rate within exceptionally tight tolerances, this Eibach Platinum series spring delivers predictable handling lap after lap and race after race. The flat-ground end configuration provides a precise, parallel seating surface, while the block-resistant design helps prevent loss of spring height under demanding operating conditions. With a 100 lb/in. spring rate, an 18 in. free length, and a 3.50 in. outside diameter, this rear spring is suitable for custom racing suspension setups when matched to the vehicle, damper, and suspension requirements.

As an Eibach ERS Platinum component, the P1800.350.0100 is intended for professional competition and performance-focused suspension builds. Confirm application fitment, installed height, available travel, and spring rate requirements before installation. This product is sold individually and is not identified as emissions-certified for street use. California Proposition 65 warning requirements may apply.

Product Specifications

• Brand: Eibach
• Series: ERS Platinum
• Part Number: P1800.350.0100
• Application: Rear racing suspension spring
• Spring Rate: 100 lb/in.
• Free Length: 18 in.
• Outside Diameter: 3.50 in.
• Construction: Ultra-high tensile strength steel

What's Included

One Eibach ERS Platinum rear racing spring.

Features:

• Increased Travel: Provides more deflection than standard racing coil springs for improved suspension compliance and control.
• Consistent Spring Rate: Maintains dimensions and rates within tight tolerances for predictable performance during repeated race use.
• Lightweight Construction: Uses proprietary ultra-high tensile strength steel to reduce physical weight.
• Block Resistant: Helps retain spring height and performance under demanding compression cycles.

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