Conventional Springs are high-performance, aftermarket suspension springs primarily used in motorsports and motor racing. The OD (outer diameter) size and free length, along with Hyperco’s Dynamic Travel Response™ spring design, allow for optimization of the total vehicle performance on many Circle Track vehicles and applications.
Unlike Coil-Over Springs that are available in a multitude of free lengths, Conventional Springs are limited in their free length offerings, often as a result of the sanctioning bodies and rules. The Engineers at Hyperco decided to analyze the dynamic characteristics essential to Conventional Spring performance. That data resulted in the development of the Dynamic Travel Response spring design concept. Working within the limitations and rules, the Dynamic Travel Response design allows all springs to exceed the performance requirements for travel and rate linearity, and is still designed with significantly less physical weight.
Shop Our Conventional Spring Inventory
Our high-performance suspension coil springs are in-stock, with most orders shipping within 24 business hours. They are ideal for use in motorsports and racing, helping lower weight and increasing performance for travel and rate linearity. Find your spring now.
Key Benefits of Conventional Springs
- More usable deflection
- Less weight than standard suspension springs
- 2% rate linearity tolerance from 20% to 60% of deflection
- 4% rate linearity tolerance from 61% to 80% of deflection
- Designed to fit all standard hardware
- Maintain free length and rate throughout a near-infinite operational life
- Lifetime warranty
For more warranty information, visit out lifetime warranty information page.
Conventional Suspension Coil Products
5-inch OD Rear S-Series Conventional Springs (SN, SNS, SNU, SNT, SS)
BASIC SPECIFICATIONS
- Free length range: 5” to 20”
- Spring rates: 80#/in to 500#/in
- Material: High tensile chrome silicone
- Finish: Hyperco dark blue powder coat
APPLICATIONS (MOTORSPORTS)
- Rear Suspension Setup for Circle Track Racing
- Street Stock
- Hobby Stock
- Dirt Modified Racing
- All Classes Requiring the use of “Big Springs”
5-inch OD Front Y-Series Conventional Springs
BASIC SPECIFICATIONS
- Free length range: 9” to 10.5″
- Spring rates: 300#/in to 1490#/in
- Material: High tensile chrome silicone
- Finish: Hyperco dark blue powder coat
APPLICATIONS (MOTORSPORTS)
- Front Suspension Setup for Circle Track Racing
- Street Stock
- Hobby Stock
- Dirt Modified Racing
- All Classes Requiring the use of “Big Springs”
5.5-inch OD Front Z-Series Conventional Springs
BASIC SPECIFICATIONS
- Free length range: 9.5”
- Spring rates: #/in to #/in
- Material: High tensile chrome silicone
- Finish: Hyperco dark blue powder coat
APPLICATIONS (MOTORSPORTS)
- Front Suspension Setup for Circle Track Racing
- Street Stock
- Hobby Stock
- Dirt Modified Racing
- All Classes Requiring the use of “Big Springs”
5.5-inch OD Rear SNP-Series Street Stocks & Stock Appearing Conventional Springs
BASIC SPECIFICATIONS
SNP11 Series
- Free length: 11”
- Spring rates: 175#/in to 275#/in
SNP12 Series
- Free length: 12″
- Spring rates: 175#/in to 300#/in
Material: High tensile chrome silicone
Finish: Semi-gloss black powder coat for OE appearance
APPLICATIONS (MOTORSPORTS)
- Rear Suspension Setup for Circle Track Racing
- Drag Racing (Limited)
7-inch OD Rear SDP-Series Street Stocks & Stock Appearing Conventional Springs
BASIC SPECIFICATIONS
- Free length: 14”
- Spring rates: 175#/in to 300#/in
- Material: High tensile chrome silicone
- Finish: Hyperco dark blue powder coat
APPLICATIONS (MOTORSPORTS)
- Rear Suspension Setup for Circle Track Racing
- Drag Racing (Limited)
5.5-inch OD Front Z11/Z12-Series Street Stocks & Stock Appearing Conventional Springs
BASIC SPECIFICATIONS
Z11 Series
- Free length: 11”
- Spring rates: 800#/in to 1300#/in
SNP12 Series
- Free length: 12″
- Spring rates: 800#/in to 1300#/in
Material: High tensile chrome silicone
Finish: Semi-gloss black powder coat for OE appearance
APPLICATIONS (MOTORSPORTS)
- Front Suspension Setup for Circle Track Racing
- Street Stock
- Hobby Stock
- Dirt Modified Racing
- All Classes Requiring the use of “Big Springs”
- Drag Racing (Limited)
