Product Details
Swift Springs Bulletproof Series Coilover Springs in 2.55" ID and 18" length are engineered for the extreme demands of competitive circle track and oval racing where springs face repeated high-stress loading cycles. These 2.55" ID Swift Bulletproof springs are manufactured in Japan from proprietary H5S.TW high-tensile alloy steel, providing the enhanced durability and rate consistency that circle track racers require for long race distances and multi-day events.
The 18" free length provides maximum usable stroke for long-travel suspension setups common in circle track applications. Swift Springs developed the Bulletproof Series after years of research with top racers, specifically engineering these springs to survive loading conditions that would cause conventional springs to sag or lose rate consistency.
Why Racers Choose Swift Springs Bulletproof Series
- Purpose-built for high-stress circle track and oval racing applications
- Proprietary H5S.TW alloy delivers extreme fatigue resistance and rate consistency
- 18" free length for maximum usable stroke in long-travel setups
- Engineered to survive repeated high-load cycles without rate degradation
- Fewer coils reduce unsprung weight
- Developed from years of research with top circle track racers
Note: Swift Coilover Springs are sold individually. Select your desired spring rate from the options above.
Specifications
| PART # | SPRING RATE | USABLE STROKE | MAX STROKE | MAX LOAD |
| lbs/inch | inch | inch | lbs | |
| 180-2550-050 BP | 50 | 12.4 | 13.4 | 670 |
| 180-2550-080 BP | 80 | 13 | 14.1 | 1,133 |
| 180-2550-100 BP | 100 | 12.8 | 13.7 | 1,369 |
| 180-2550-125 BP | 125 | 13.4 | 13.4 | 1,680 |