Hyperco Conventional Coil Spring 5in ID 13in Tall 125lb/in Rate — Rear Suspension Performance

SKU: BJRF_18S-125
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Hyperco

Hyperco engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Hyperco lineup with fast shipping and expert fitment support — order with confidence.

Hyperco 5in ID 13in Tall Conventional Coil Spring - 125 lb/in

Achieve superior handling and consistent suspension travel with the Hyperco 125 lb/in conventional coil spring. Designed for demanding racing environments, this 5-inch ID, 13-inch tall spring provides the reliability needed for competitive rear suspension setups. Engineered with high-tensile steel and finished in a durable blue powder coat, these springs resist sagging and maintain their rate under extreme thermal loads.

Technical Specifications

  • Spring Rate: 125 lb/in
  • Internal Diameter: 5 inches
  • Free Length: 13 inches
  • Material: High-Tensile Steel
  • Finish: Blue Powder Coat
  • Application: Rear Suspension

Hyperco springs are renowned for their tight manufacturing tolerances, ensuring that your corner weights remain balanced and your vehicle handling is predictable. Whether you are building a circle track car or fine-tuning a custom chassis, these springs offer the linear response required for professional-grade performance. The conventional design ensures compatibility with a wide range of standard coil-over hardware and suspension components. By choosing Hyperco, you are investing in decades of engineering excellence designed to give you the competitive edge on the track. Experience the difference in suspension precision and durability with parts sourced from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Hyperco

Hyperco engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Hyperco lineup with fast shipping and expert fitment support — order with confidence.

Hyperco 5in ID 13in Tall Conventional Coil Spring - 125 lb/in

Achieve superior handling and consistent suspension travel with the Hyperco 125 lb/in conventional coil spring. Designed for demanding racing environments, this 5-inch ID, 13-inch tall spring provides the reliability needed for competitive rear suspension setups. Engineered with high-tensile steel and finished in a durable blue powder coat, these springs resist sagging and maintain their rate under extreme thermal loads.

Technical Specifications

  • Spring Rate: 125 lb/in
  • Internal Diameter: 5 inches
  • Free Length: 13 inches
  • Material: High-Tensile Steel
  • Finish: Blue Powder Coat
  • Application: Rear Suspension

Hyperco springs are renowned for their tight manufacturing tolerances, ensuring that your corner weights remain balanced and your vehicle handling is predictable. Whether you are building a circle track car or fine-tuning a custom chassis, these springs offer the linear response required for professional-grade performance. The conventional design ensures compatibility with a wide range of standard coil-over hardware and suspension components. By choosing Hyperco, you are investing in decades of engineering excellence designed to give you the competitive edge on the track. Experience the difference in suspension precision and durability with parts sourced from GGCRACING.

Product Details

Product Description

About Hyperco

Hyperco engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Hyperco lineup with fast shipping and expert fitment support — order with confidence.

Hyperco 5in ID 13in Tall Conventional Coil Spring - 125 lb/in

Achieve superior handling and consistent suspension travel with the Hyperco 125 lb/in conventional coil spring. Designed for demanding racing environments, this 5-inch ID, 13-inch tall spring provides the reliability needed for competitive rear suspension setups. Engineered with high-tensile steel and finished in a durable blue powder coat, these springs resist sagging and maintain their rate under extreme thermal loads.

Technical Specifications

  • Spring Rate: 125 lb/in
  • Internal Diameter: 5 inches
  • Free Length: 13 inches
  • Material: High-Tensile Steel
  • Finish: Blue Powder Coat
  • Application: Rear Suspension

Hyperco springs are renowned for their tight manufacturing tolerances, ensuring that your corner weights remain balanced and your vehicle handling is predictable. Whether you are building a circle track car or fine-tuning a custom chassis, these springs offer the linear response required for professional-grade performance. The conventional design ensures compatibility with a wide range of standard coil-over hardware and suspension components. By choosing Hyperco, you are investing in decades of engineering excellence designed to give you the competitive edge on the track. Experience the difference in suspension precision and durability with parts sourced from GGCRACING.

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