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Swift Springs has designed and engineered the standard measurement springs based on data collected from racers at the top of their class. All Swift Springs are manufactured using H5S.TW. which is far superior to typical silicone chrome steel and allows us to wind a much more responsive spring with less coils, resulting in reduced un-sprung weight and increased stroke. Swift specifically designed a standard measurement race springs to accommodate American race industries including oval track racing, and drag racing, and offroad racing.
Purpose built for those of you putting more stress on a spring than how is conventionally used. We sought after a new approach in development from our regular suspension spring.
After years of research and development, Swift springs would like to proudly present the BP Spring for circle track racing. Specifically designed to meet and surpass the unique needs of Circle Track Racers. Although specially made, these springs are constructed with the same SWIFT SPRINGS philosophy and that is to be responsive and increase overall traction. Bulletproof Springs from Swift Springs feature a copper colored coating.
| DMS Part # | Swift Part # | Outside Diameter (in.) | Length (in.) | Rate (lbs/in) | Useable Stroke (in.) | Maximum Stroke (in.) | Maximum Load (lbs) |
|---|---|---|---|---|---|---|---|
| SWS-5-12-200 | 120-500-200 | 5 | 12 | 200 | 8.6 | 8.9 | 1179 |
| SWS-5-12-225 | 120-500-225 | 5 | 12 | 225 | 8.3 | 8.8 | 1975 |
| SWS-5-12-250 | 120-500-250 | 5 | 12 | 250 | 8 | 8.7 | 2175 |
| SWS-5-12-275 | 120-500-275 | 5 | 12 | 275 | 7.8 | 8.5 | 2338 |
| SWS-5-12-300 | 120-500-300 | 5 | 12 | 300 | 7.8 | 8.4 | 2527 |
| SWS-5-13-080 | 130-500-080 | 5 | 13 | 80 | 10.4 | 10.4 | 827 |
| SWS-5-13-100BP | 130-500-100 BP | 5 | 13 | 100 | 10 | 10.2 | 1028 |
| SWS-5-13-125BP | 130-500-125 BP | 5 | 13 | 125 | 10 | 10.2 | 1279 |
| SWS-5-13-150BP | 130-500-150 BP | 5 | 13 | 150 | 9.7 | 10.1 | 1517 |
| SWS-5-13-175BP | 130-500-175 BP | 5 | 13 | 175 | 9.4 | 9.9 | 1738 |
| SWS-5-13-200BP | 130-500-200 BP | 5 | 13 | 200 | 9.2 | 9.7 | 1940 |
| SWS-5-13-225BP | 130-500-225 BP | 5 | 13 | 225 | 9.2 | 9.8 | 2205 |
| SWS-5-13-250 | 130-500-250 | 5 | 13 | 250 | 8.5 | 9.5 | 2383 |
| SWS-5-13-275 | 130-500-275 | 5 | 13 | 275 | 8.3 | 9.5 | 2602 |
| SWS-5-13-300 | 130-500-300 | 5 | 13 | 300 | 8.4 | 9.1 | 2735 |
| SWS-5-14-175 | 140-500-175 | 5 | 14 | 175 | 9.3 | 10.5 | 1852 |
| SWS-5-14-200 | 140-500-200 | 5 | 14 | 200 | 8.9 | 10.5 | 2097 |
| SWS-5-14-225 | 140-500-225 | 5 | 14 | 225 | 8.8 | 10.4 | 2355 |
| SWS-5-14-250 | 140-500-250 | 5 | 14 | 250 | 8.8 | 10.1 | 2540 |
| SWS-5-14-275 | 140-500-275 | 5 | 14 | 275 | 8.5 | 10.1 | 2809 |
| SWS-5-14-300 | 140-500-300 | 5 | 14 | 300 | 8.3 | 10 | 3034 |
| SWS-5-14-325 | 140-500-325 | 5 | 14 | 325 | 8.3 | 9.7 | 3164 |
| SWS-5-14-350 | 140-500-350 | 5 | 14 | 350 | 8.1 | 9.7 | 3408 |
| SWS-5-16-065 | 160-500-065 | 5 | 16 | 65 | 12.1 | 12.1 | 785 |
| SWS-5-16-080 | 160-500-080 | 5 | 16 | 80 | 12.2 | 12.2 | 977 |
| SWS-5-16-080BP | 160-500-080 BP | 5 | 16 | 80 | 12.9 | 12.9 | 1030 |
| SWS-5-16-100 | 160-500-100 | 5 | 16 | 100 | 12.1 | 12.1 | 1219 |
| SWS-5-16-100BP | 160-500-100 BP | 5 | 16 | 100 | 12.5 | 12.5 | 1252 |
| SWS-5-16-112 | 160-500-112 | 5 | 16 | 112 | 12 | 12 | 1349 |
| SWS-5-16-125BP | 160-500-125 | 5 | 16 | 125 | 12 | 12.3 | 1541 |
| SWS-5-16-150BP | 160-500-150 | 5 | 16 | 150 | 11.7 | 12 | 1808 |
| SWS-5-16-175BP | 160-500-175 | 5 | 16 | 175 | 10.7 | 12 | 2100 |
| SWS-5-16-200 | 160-500-200 | 5 | 16 | 200 | 10.5 | 11.7 | 2350 |
| SWS-5-16-225 | 160-500-225 | 5 | 16 | 225 | 10.4 | 11.4 | 2575 |
| SWS-5-18-100 | 180-500-100 | 5 | 18 | 100 | 13.3 | 13.3 | 1334 |
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