Standard Conventional Springs



Standard Conventional Springs
Developed specifically for Round track racing. Designed to have the optimal spring rate sweet spot where the spring is used on actual vehicle.

As you might know, United States are the largest racer populated country in the world. Through our experiences from extensive testing in world class racing in Europe and Asia, we have great confidence that we can provide the same results in the US. Swift specifically designed a standard measurement race springs to accommodate American race industries including oval track racing, and drag racing, and offroad racing.

By knowing the main characteristics that American racer demands, we designed and engineered the standard measurement springs based on data that we had collected through racers that are at the top of their sport. A slight difference in design than our metric coilover springs. Many enthusiasts will swap springs from brand to brand with the only noticeable difference being a stiffer or softer ride. But what if a spring could offer a noticeable increase in traction, smoother weight transfer, better ride quality, lower tire temperatures, and a more predictable feel? The engineers at Swift have taken that "what if" and turned it into reality. 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.

Bulletproof Series Springs (Parts number ending in BP)
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



OD 5" - 9.5" LENGTH - FRONT

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
950-500-450 450 5.7 6.3 2,804
950-500-500 500 5.7 7.6 3,041
950-500-550 550 5.7 7.4 3,213
950-500-600 600 5.5 7.3 3,468
950-500-650 650 5.3 7.3 3,767
950-500-700 700 5.3 7.0 3,856
950-500-750 750 5.0 7.2 4,276
950-500-800 800 5.1 6.9 4,309
950-500-850 850 4.8 7.1 4,729
950-500-900 900 5.0 5.1 4,571
950-500-950 950 4.7 5.3 5,012
950-500-1000 1000 4.5 5.4 5,433


OD 5" - 11" LENGTH

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
110-500-125 BP 125 8.5 8.7 1,091
110-500-150 BP 150 8.5 8.6 1,292
110-500-175 BP 175 7.9 8.4 1,479
110-500-200 BP 200 7.6 8.5 1,707
110-500-225 225 7.2 8.4 1,896
110-500-250 250 7.1 8.3 2,069
110-500-275 275 6.9 8.2 2,257
110-500-300 300 6.9 8.0 2,407
110-500-325 325 6.8 7.9 2,573
110-500-350 350 6.6 7.9 2,768
110-500-375 375 6.5 7.8 2,917
110-500-400 400 6.5 7.6 3,058


OD 5" - 13" LENGTH

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
130-500-150 BP 150 9.7 10.1 1,517
130-500-175 BP 175 9.4 9.9 1,738
130-500-200 BP 200 9.2 9.7 1,940
130-500-225 BP 225 9.2 9.8 2,205
130-500-250 250 8.5 9.5 2,383
130-500-275 275 8.3 9.5 2,602
130-500-300 300 8.4 9.1 2,735
130-500-325 325 8.2 9.0 2,928
130-500-350 350 7.9 9.0 3,150
130-500-375 375 7.7 9.0 3,372
130-500-400 400 7.6 8.8 3,532
130-500-450 450 7.5 8.6 3,873
130-500-500 500 7.4 8.3 4,173


OD 5" - 15" LENGTH

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
150-500-225 225 9.2 11.2 2,522
150-500-250 250 9.2 10.9 2,722
150-500-275 275 8.9 10.8 2,976
150-500-300 300 8.6 10.7 3,217


OD 5" - 16" LENGTH

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
160-500-125 BP 125 12.0 12.3 1,541
160-500-150 BP 150 11.7 12.0 1,808
160-500-175 BP 175 10.7 12.0 2,100
160-500-200 200 10.5 11.7 2,350


PULL BAR SPRINGS

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
067-500-600-1200 600-1200 3.0 3.2 2,632


OD 5.5" - 9.5" LENGTH - FRONT

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
950-550-325 325 6.1 6.8 2,206
950-550-350 350 6.1 6.7 2,334
950-550-375 375 6.0 6.6 2,471
950-550-400 400 6.0 6.5 2,589
950-550-425 425 5.8 6.5 2,751
950-550-450 450 5.7 6.4 2,877
950-550-475 475 5.4 6.5 3,093
950-550-500 500 5.5 6.4 3,196
950-550-550 550 5.5 6.2 3,408
950-550-600 600 5.5 5.9 3,575
950-550-650 650 5.1 6.1 4,001
950-550-700 700 5.1 5.9 4,144
950-550-750 750 4.8 6.1 4,558
950-550-800 800 5.0 5.7 4,578
950-550-850 850 4.7 5.9 4,998


OD 5.5" - 11" LENGTH - FRONT

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
kgf/mm inch inch lbs
110-550-350 350 6.5 7.7 2,701
110-550-375 375 6.3 7.7 2,879
110-550-400 400 6.2 7.7 3,071
110-550-425 425 6.1 7.5 3,196

All the specs above are subject to change without any notice.