Eibach ER Platinum Rear Motorsport Spring PR1800.500.0050, 18-Inch Length, 5.0-Inch Outside Diameter, 50 lb/in Rate

Renowned for our extensive catalog of over 1,500 precision engineered race springs. Eibach race springs offer unparalled customization and performance optimization across a wide spectrum of racing applications. From shocks to pull-bars we offer a wide range of springs solutions to fine tune the handling dynamics of your race car. Individual Motorsport Spring

• 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
• More Travel / Deflection than Standard Racing Coil Springs
• Ultra Light-Weight Using High Tensile Steel
• Block Resistant - No Loss in Spring Height!

The Eibach ER Platinum Rear Motorsport Spring is engineered for racers who require consistent suspension performance and precise tuning across demanding track conditions. Part number PR1800.500.0050 features an 18-inch spring length, a 5.0-inch outside diameter, and a 50 lb/in spring rate for predictable handling characteristics and repeatable suspension response. As part of Eibach’s extensive race spring range, this individual spring supports suspension optimization for a wide variety of motorsport applications.

Built from high-tensile steel, the Eibach ER Platinum Spring combines lightweight construction with excellent durability. Its flat-ground end configuration is designed with parallel tolerance within +/-1 degree, helping promote accurate installation and consistent load distribution. The spring also provides greater travel and deflection than standard racing coil springs, allowing suspension systems to better manage changing track surfaces and dynamic load conditions.

The ER Platinum design is engineered to maintain its dimensions and spring rate within exceptionally tight tolerances lap after lap and race after race. Its block-resistant construction helps prevent loss of spring height under repeated compression, supporting dependable ride-height control and consistent vehicle behavior. This rear spring is intended for custom motorsport suspension setups where spring rate selection, travel, and long-term consistency are essential. Verify spring dimensions, rate, and application requirements before installation.

Key Product Specifications & Technical Data

• Brand: Eibach
• Series: ER Platinum Motorsport Spring
• Part Number: PR1800.500.0050
• Position: Rear
• Spring Length: 18 inches
• Outside Diameter: 5.0 inches
• Spring Rate: 50 lb/in
• Construction: High-tensile steel race spring

What’s Included

• One Eibach ER Platinum rear motorsport spring

Features:

• Consistent Racing Performance: Maintains spring dimensions and rate within tight tolerances for repeatable handling from lap to lap.
• Flat-Ground End Configuration: Provides parallel tolerance within +/-1 degree for accurate fitment and consistent load distribution.
• Increased Suspension Travel: Offers more travel and deflection than standard racing coil springs to help manage dynamic track loads.
• Lightweight, Block-Resistant Construction: Uses high-tensile steel and resists loss of spring height under repeated compression.

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