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Standard Coilover Springs
Increase traction, less un-sprung mass, more stroke, increased handling. The only thing you will be losing is track time

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

Most of Swift 10" and longer springs (Excluding the Drag racing springs and Conventional springs) are barrel design; the design is to solve all spring Deflection (bowing) problems. With bowing springs, you can expect spring rate inconsistency, and rubbing against shock body that would lead to damage on the shock adjusting perch thread.

One approach to assess spring deflection would be to increase the number of coils on the springs. With more coils on the spring, you will experience less bowing motion. This is the easy and cheaper method to solve the issue. But the downside of this method is a decrease in spring stroke, increase in un-sprung mass, and will affect the overall movement of other suspension components

Unlike others, Swift designed barrel springs with ease and consistency of vehicle setup in mind, our barrel springs design have a maximum of 4" outer diameter (except B5 and B3 series)(Usually located on the center coil of the spring). Because most other manufacture do not design their barrel springs with this rule, most of their barrel springs outside diameter will differ from one rate to another. This creates a hard time for racers especially with tight clearances to test and see which rates will fit and which rate does not. A heavier rate spring can interfere with the suspension A-arm or other suspension components.



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

HELPER SPRINGS

Part # Spring Rate Usable Stroke Max Stroke Max. Load
lbs/inch kgf/mm inch mm inch mm lbs kg
H030-040-040 40 0.7 4 102 2.9 73 0.9 128
H030-040-250 250 4.5 4 102 2.3 59 1.7 584
H030-040-400 400 7.2 4 102 2.1 53 1.9 831
H030-060-250 250 4.5 6 152 3.3 85 2.6 836

ID 3.0" - 8" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load
lbs/inch kgf/mm inch mm inch mm lbs kg
080-300-200 200 3.6 5 126 5.9 150 1,181 536
080-300-300 300 5.4 4.5 115 5.6 143 1,689 766
080-300-400 400 7.1 4.3 110 5.4 136 2,142 971
080-300-500 500 8.9 4.1 104 5.2 131 2,579 1,170
080-300-600 600 10.7 3.9 100 5 127 3,000 1,361

ID 3.0" - 10" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load
lbs/inch kgf/mm inch mm inch mm lbs kg
100-300-200 200 3.6 6 152 7.3 185 1,457 661
100-300-300 300 5.4 5.5 140 6.9 175 2,067 938
100-300-400 400 7.1 5.1 130 6.6 168 2,646 1,200
100-300-500 500 8.9 4.9 125 6.3 161 3,169 1,438
100-300-600 600 10.7 4.8 121 6.1 154 3,638 1,650

ID 3.0" - 12" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load
lbs/inch kgf/mm inch mm inch mm lbs kg
120-300-100 100 1.8 8.3 212 9.2 233 917 416
120-300-150 150 2.7 8.1 207 8.8 224 1,323 601
120-300-175 175 3.1 7.8 197 8.7 222 1,530 695
120-300-200 200 3.6 7.5 191 8.6 219 1,724 784
120-300-225 225 4 7.3 186 8.5 215 1,905 866
120-300-250 250 4.5 7.2 184 8.3 211 2,077 944
120-300-275 275 4.9 7.2 182 8.1 206 2,230 1,014
120-300-300 300 5.4 7.2 182 7.9 200 2,362 1,074
120-300-325 325 5.8 6.9 176 7.9 201 2,572 1,169
120-300-350 350 6.3 6.8 173 7.8 198 2,728 1,240
120-300-375 375 6.7 6.9 175 7.5 191 2,820 1,282
120-300-400 400 7.2 6.7 171 7.5 191 3,008 1,368
120-300-425 425 7.6 6.7 170 7.4 187 3,129 1,423
120-300-450 450 8.1 6.7 170 7.2 182 3,224 1,466
120-300-475 475 8.5 6.7 170 7 178 3,329 1,513
120-300-500 500 9 6.5 166 7 177 3,484 1,584
120-300-550 550 9.8 6.1 156 6.9 176 3,811 1,729
120-300-600 600 10.7 5.9 151 6.9 175 4,134 1,875
120-300-650 650 11.6 5.8 147 6.9 174 4,453 2,020
120-300-700 700 12.5 5.6 141 6.9 176 4,850 2,200
120-300-750 750 13.4 5.6 143 6.6 168 4,961 2,250

ID 3.0" - 14" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load
lbs/inch kgf/mm inch mm inch mm lbs kg
140-300-150 150 2.7 9.1 231 10.3 261 1,541 701
140-300-175 175 3.1 9 228 9.9 252 1,736 789
140-300-200 200 3.6 8.7 220 9.8 249 1,961 891
140-300-225 225 4 8.4 214 9.6 245 2,170 987
140-300-250 250 4.5 8.3 210 9.5 241 2,372 1,078
140-300-275 275 4.9 8.1 207 9.3 235 2,544 1,157
140-300-300 300 5.4 8 202 9.2 233 2,752 1,251
140-300-350 350 6.3 7.8 199 8.8 224 3,087 1,403
140-300-400 400 7.2 7.5 191 8.7 220 3,465 1,575
140-300-450 450 8.1 7.3 185 8.5 215 3,809 1,732
140-300-500 500 9 7.2 182 8.2 209 4,114 1,871
140-300-550 550 9.8 7.1 180 8 202 4,374 1,989
140-300-600 600 10.7 7 179 7.7 195 4,606 2,094
140-300-650 650 11.6 6.2 158 7.9 201 5,144 2,333

ID 3.0" - 16" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load
lbs/inch kgf/mm inch mm inch mm lbs kg
160-300-250 250 4.5 9.4 238 10.5 266 2,618 1,190
160-300-300 300 5.4 8.9 227 10.2 258 3,047 1,385
160-300-350 350 6.3 8.6 218 10 253 3,486 1,585
160-300-400 400 7.2 8.5 216 9.5 241 3,795 1,726
160-300-450 450 8.1 8 202 9.6 245 4,341 1,973
160-300-500 500 9 7.8 198 9.4 239 4,705 2,139
160-300-550 550 9.8 7.7 196 9.1 232 5,024 2,284

ID 3.0" - 18" LENGTH

Part # Spring Rate Usable Stroke Max Stroke Max. Load
lbs/inch kgf/mm inch mm inch mm lbs kg
180-300-250 250 4.5 10.4 263 11.5 293 2,884 1,311
180-300-300 300 5.4 10 255 11.1 281 3,319 1,509
180-300-350 350 6.3 9.7 247 10.6 270 3,720 1,692
180-300-400 400 7.2 9.4 240 10.4 263 4,142 1,883
180-300-450 450 8.1 8.7 220 10.7 273 4,837 2,199
180-300-500 500 9 8.5 215 10.5 267 5,256 2,390

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