Hyperco Rear Spring 5in ID 13in Tall 18S-275

A properly matched rear spring is critical for chassis balance, weight transfer, and consistent lap times—especially in competition applications where suspension geometry directly impacts handling predictability. The Hyperco 18S-275 delivers a stiff 275 lb/in spring rate in a compact 13-inch package, making it ideal for vehicles requiring aggressive spring rates without excessive ride height penalties. Whether you're fine-tuning a road course setup or building a dedicated race car, this conventional coil spring provides the consistent, linear support needed for repeatable performance.

• 5.0 in inner diameter
• 13.0 in total length
• 275 lb/in spring rate
• Conventional coil design
• Rear application
• Blue powder coat finish
• Sold individually