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Metric Coilover Springs
More stroke, increased traction and handling, Less Un-sprung weight.
The only thing you will be losing is lap time.


Swift's innovative designs have made us a staple in the performance tuning world. Our products are the result of over 90 years of experience in industrial spring manufacturing. Our engineers have spent countless hours developing and re-developing our springs, in order to create a product that is light, durable, and compliant, while still maintaining linear spring rates.

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 silicone chrome steel and allows us to wind our springs with less coils, resulting in reduced un-sprung weight and increased stroke

Since the metric system is used widely in the sport compact and road race market, we have introduced the metric line of coilover springs to reduce confusion and to better cater to our customer's needs.

Our metric coilover springs come in various sizes with inner diameters ranging from 60mm (2.25in) to 70mm (2.75in), spring lengths from 127mm (5in) to 280mm (11in), and spring rates from 3kg (168lbs) all the way up to 34kg (1900lbs). Whether you are looking for a comfortable ride for your commuter or a more aggressive setup for your race car, we have the right spring for your application!



ID 70MM (2.76") - 6" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z70-152-040 4.0 224 96 3.78 113 4.4 452 996
Z70-152-050 5.0 280 95 3.74 108 4.3 542 1,194
Z70-152-060 6.0 336 90 3.54 106 4.2 637 1,403
Z70-152-070 7.0 392 88 3.46 103 4.1 722 1,593
Z70-152-080 8.0 448 83 3.27 103 4.1 826 1,820
Z70-152-090 9.0 504 83 3.27 99 3.9 893 1,968
Z70-152-100 10.0 560 80 3.15 98 3.9 984 2,169
Z70-152-120 12.0 672 78 3.07 94 3.7 1,130 2,492
Z70-152-140 14.0 784 74 2.91 93 3.6 1,296 2,858
Z70-152-160 16.0 896 72 2.83 90 3.6 1,445 3,185
Z70-152-180 18.0 1008 69 2.72 89 3.5 1,607 3,544
Z70-152-200 20.0 1120 65 2.56 89 3.5 1,788 3,942


ID 70MM (2.76") - 7" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z70-178-040 4.0 224 112 4.4 130 5.1 520 1,146
Z70-178-050 5.0 280 109 4.3 125 4.9 625 1,378
Z70-178-060 6.0 336 106 4.2 121 4.8 725 1,598
Z70-178-070 7.0 392 100 3.9 120 4.7 839 1,849
Z70-178-080 8.0 448 101 4.0 114 4.5 911 2,009
Z70-178-090 9.0 504 93 3.7 116 4.6 1,042 2,298
Z70-178-100 10.0 560 92 3.6 113 4.5 1,131 2,493
Z70-178-120 12.0 672 87 3.4 111 4.4 1,331 2,934
Z70-178-140 14.0 784 82 3.2 109 4.3 1,532 3,377
Z70-178-160 16.0 896 79 3.1 107 4.2 1,717 3,785
Z70-178-180 18.0 1008 77 3.0 105 4.1 1,881 4,147
Z70-178-200 20.0 1120 73 2.9 105 4.1 2,100 4,630


ID 70MM (2.76") - 8" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z70-203-040 4.0 224 129 5.1 150 5.9 598 1,318
Z70-203-050 5.0 280 127 5.0 144 5.7 721 1,590
Z70-203-060 6.0 336 117 4.6 137 5.4 819 1,806
Z70-203-070 7.0 392 115 4.5 137 5.4 958 2,113
Z70-203-080 8.0 448 105 4.1 132 5.2 1,052 2,319
Z70-203-090 9.0 504 104 4.1 135 5.3 1,211 2,671
Z70-203-100 10.0 560 100 3.9 130 5.1 1,301 2,868
Z70-203-120 12.0 672 96 3.8 130 5.1 1,556 3,431
Z70-203-140 14.0 784 94 3.7 125 4.9 1,756 3,870
Z70-203-160 16.0 896 92 3.6 120 4.7 1,914 4,219
Z70-203-180 18.0 1008 89 3.5 115 4.5 2,077 4,579
Z70-203-200 20.0 1120 87 3.4 113 4.4 2,252 4,965


ID 70MM (2.76") - 9" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z70-228-040 4.0 224 136 5.4 164 6.5 657 1,448
Z70-228-050 5.0 280 127 5.0 162 6.4 808 1,780
Z70-228-060 6.0 336 125 4.9 155 6.1 928 2,045
Z70-228-070 7.0 392 120 4.7 152 6.0 1,061 2,340
Z70-228-080 8.0 448 117 4.6 148 5.8 1,181 2,603
Z70-228-090 9.0 504 116 4.6 143 5.6 1,285 2,833
Z70-228-100 10.0 560 113 4.4 140 5.5 1,401 3,089
Z70-228-120 12.0 672 110 4.3 133 5.2 1,597 3,521
Z70-228-140 14.0 784 105 4.1 130 5.1 1,820 4,012


ID 70MM (2.76") - 10" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z70-254-030 3.0 168 163 6.4 185 7.3 555 1,223
Z70-254-040 4.0 224 147 5.8 182 7.2 729 1,608
Z70-254-050 5.0 280 140 5.5 177 7.0 885 1,950
Z70-254-060 6.0 336 134 5.3 173 6.8 1,036 2,283
Z70-254-070 7.0 392 131 5.2 167 6.6 1,167 2,573
Z70-254-080 8.0 448 125 4.9 166 6.5 1,325 2,921
Z70-254-090 9.0 504 121 4.8 163 6.4 1,471 3,242
Z70-254-100 10.0 560 120 4.7 158 6.2 1,580 3,483
Z70-254-120 12.0 672 116 4.6 151 5.9 1,811 3,992


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