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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 65MM (2.37") - 4" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-102-180 18 1,008 52 2 56 2.2 1,008 2,222
Z65-102-200 20 1,120 50 2 55 2.2 1,100 2,425
Z65-102-220 22 1,232 48 1.9 55 2.2 1,210 2,668
Z65-102-240 24 1,344 48 1.9 53 2.1 1,272 2,804
Z65-102-260 26 1,456 47 1.9 52 2 1,352 2,981
Z65-102-280 28 1,568 45 1.8 52 2 1,456 3,210
Z65-102-300 30 1,680 45 1.8 50 2 1,500 3,307
Z65-102-320 32 1,792 44 1.7 50 2 1,600 3,527
Z65-102-340 34 1,904 43 1.7 49 1.9 1,666 3,673


ID 65MM (2.56") - 5" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-127-080 8.0 448 72 2.8 83.5 3.3 668 1,472
Z65-127-100 10.0 560 72 2.83 79.3 3.1 793 1,748
Z65-127-120 12.0 672 68 2.68 78.0 3.1 936 2,064
Z65-127-140 14.0 784 67 2.64 74.5 2.9 1,043 2,299
Z65-127-160 16.0 896 64 2.52 73.5 2.9 1,176 2,593
Z65-127-180 18.0 1008 63 2.48 70.6 2.8 1,271 2,802
Z65-127-200 20.0 1120 63 2.48 67.2 2.6 1,344 2,963
Z65-127-220 22.0 1232 62 2.44 65.1 2.6 1,432 3,157
Z65-127-240 24.0 1344 60 2.36 64.4 2.5 1,546 3,407
Z65-127-260 26.0 1456 58 2.28 63.5 2.5 1,651 3,640
Z65-127-280 28.0 1568 56 2.20 62.3 2.5 1,744 3,846
Z65-127-300 30.0 1680 55 2.17 62.5 2.5 1,875 4,134
Z65-127-320 32.0 1792 53 2.09 62.7 2.5 2,006 4,423
Z65-127-340 34.0 1904 52 2.05 61.1 2.4 2,077 4,580


ID 65MM (2.56") - 6" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-152-040 4.0 224 103 4.06 107 4.2 426 939
Z65-152-050 5.0 280 95 3.74 105 4.1 526 1,159
Z65-152-060 6.0 336 93 3.66 103 4.0 615 1,356
Z65-152-070 7.0 392 89 3.50 99 3.9 694 1,531
Z65-152-080 8.0 448 84 3.31 99 3.9 793 1,748
Z65-152-090 9.0 504 79 3.11 100 3.9 902 1,988
Z65-152-100 10.0 560 74 2.91 101 4.0 1,009 2,224
Z65-152-110 11.0 616 72 2.83 100 3.9 1,097 2,418
Z65-152-120 12.0 672 71 2.80 98 3.9 1,177 2,595
Z65-152-130 13.0 728 70 2.76 96 3.8 1,252 2,760
Z65-152-140 14.0 784 71 2.80 93 3.6 1,296 2,858
Z65-152-150 15.0 840 69 2.72 92 3.6 1,385 3,052
Z65-152-160 16.0 896 69 2.72 90 3.5 1,442 3,178
Z65-152-180 18.0 1008 64 2.52 92 3.6 1,660 3,659
Z65-152-200 20.0 1120 62 2.44 92 3.6 1,844 4,065
Z65-152-220 22.0 1232 61 2.40 90 3.5 1,982 4,370
Z65-152-240 24.0 1344 59 2.32 89 3.5 2,146 4,730
Z65-152-260 26.0 1456 57 2.24 89 3.5 2,301 5,073
Z65-152-280 28.0 1568 56 2.20 87 3.4 2,444 5,389
Z65-152-300 30.0 1680 59 2.32 83 3.3 2,481 5,470
Z65-152-320 32.0 1792 57 2.24 83 3.3 2,653 5,848
Z65-152-340 34.0 1904 58 2.28 78 3.1 2,649 5,839


ID 65MM (2.56") - 7" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-178-040 4.0 224 120 4.7 122 4.8 487 1,074
Z65-178-050 5.0 280 110 4.3 121 4.7 603 1,329
Z65-178-060 6.0 336 106 4.2 118 4.6 708 1,561
Z65-178-070 7.0 392 93 3.7 119 4.7 833 1,836
Z65-178-080 8.0 448 93 3.7 117 4.6 936 2,064
Z65-178-090 9.0 504 89 3.5 117 4.6 1,049 2,314
Z65-178-100 10.0 560 86 3.4 116 4.6 1,157 2,551
Z65-178-110 11.0 616 83 3.3 115 4.5 1,260 2,777
Z65-178-120 12.0 672 83 3.3 111 4.4 1,331 2,934
Z65-178-130 13.0 728 80 3.1 111 4.4 1,444 3,184
Z65-178-140 14.0 784 80 3.1 109 4.3 1,527 3,367
Z65-178-150 15.0 840 76 3.0 109 4.3 1,635 3,605
Z65-178-160 16.0 896 76 3.0 107 4.2 1,706 3,760
Z65-178-180 18.0 1008 73 2.9 105 4.1 1,897 4,183
Z65-178-200 20.0 1120 70 2.8 106 4.2 2,114 4,661
Z65-178-220 22.0 1232 68 2.7 106 4.2 2,321 5,117
Z65-178-240 24.0 1344 68 2.7 101 4.0 2,429 5,355
Z65-178-260 26.0 1456 67 2.6 96 3.8 2,509 5,531
Z65-178-280 28.0 1568 66 2.6 91 3.6 2,565 5,654


ID 65MM (2.56") - 8" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-203-040 4.0 224 132 5.2 139 5.5 557 1,228
Z65-203-050 5.0 280 126 5.0 133 5.2 666 1,468
Z65-203-060 6.0 336 118 4.6 131 5.1 785 1,730
Z65-203-070 7.0 392 115 4.5 127 5.0 891 1,965
Z65-203-080 8.0 448 107 4.2 128 5.0 1,025 2,259
Z65-203-090 9.0 504 102 4.0 128 5.0 1,152 2,540
Z65-203-100 10.0 560 100 3.9 125 4.9 1,250 2,756
Z65-203-110 11.0 616 92 3.6 126 5.0 1,389 3,063
Z65-203-120 12.0 672 92 3.6 125 4.9 1,496 3,299
Z65-203-130 13.0 728 89 3.5 125 4.9 1,630 3,594
Z65-203-140 14.0 784 87 3.4 123 4.9 1,726 3,806
Z65-203-160 16.0 896 87 3.4 116 4.6 1,858 4,095
Z65-203-180 18.0 1008 82 3.2 118 4.6 2,117 4,667
Z65-203-200 20.0 1120 79 3.1 118 4.7 2,366 5,216
Z65-203-220 22.0 1,232 78 3.1 109 4.3 2,409 5,310
Z65-203-240 24.0 1,344 77 3.0 109 4.3 2,628 5,793


ID 65MM (2.56") - 9" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-228-040 4.0 224 138 5.4 159 6.2 635 1,399
Z65-228-050 5.0 280 127 5.0 158 6.2 791 1,744
Z65-228-060 6.0 336 124 4.9 150 5.9 902 1,989
Z65-228-070 7.0 392 115 4.5 152 6.0 1,066 2,350
Z65-228-080 8.0 448 113 4.4 148 5.8 1,182 2,607
Z65-228-090 9.0 504 112 4.4 143 5.6 1,283 2,829
Z65-228-100 10.0 560 104 4.1 145 5.7 1,448 3,192
Z65-228-120 12.0 672 102 4.0 137 5.4 1,648 3,632
Z65-228-140 14.0 784 94 3.7 139 5.5 1,940 4,278
Z65-228-160 16.0 896 92 3.6 134 5.3 2,139 4,716


ID 65MM (2.56") - 10" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-254-030 3.0 168 160 6.3 182 7.2 546 1,204
Z65-254-040 4.0 224 157 6.2 169 6.7 678 1,494
Z65-254-050 5.0 280 150 5.9 163 6.4 816 1,799
Z65-254-060 6.0 336 144 5.7 158 6.2 949 2,091
Z65-254-070 7.0 392 132 5.2 161 6.3 1,128 2,486
Z65-254-080 8.0 448 125 4.9 160 6.3 1,276 2,813
Z65-254-090 9.0 504 124 4.9 154 6.1 1,386 3,056
Z65-254-100 10.0 560 116 4.6 157 6.2 1,570 3,461
Z65-254-120 12.0 672 111 4.4 152 6.0 1,825 4,024
Z65-254-140 14.0 784 100 3.9 157 6.2 2,194 4,836


ID 65MM (2.56") - 11" Length

Part # Spring Rate Usable Stroke Max Stroke Max. Load
kgf/mm lbs/inch mm inch mm inch kgf lbs
Z65-280-030 3.0 168 175 6.9 198 7.8 525 1,157
Z65-280-035 3.5 196 167 6.6 197 7.8 581 1,281
Z65-280-040 4.0 224 159 6.3 195 7.7 636 1,402
Z65-280-045 4.5 252 152 6.0 194 7.6 684 1,508
Z65-280-050 5.0 280 151 5.9 189 7.4 755 1,664
Z65-280-055 5.5 308 147 5.8 187 7.4 809 1,782
Z65-280-060 6.0 336 145 5.7 184 7.2 870 1,918
Z65-280-065 6.5 364 140 5.5 184 7.2 910 2,006
Z65-280-070 7.0 392 136 5.4 184 7.2 952 2,099
Z65-280-080 8.0 448 132 5.2 179 7.1 1,056 2,328
Z65-280-090 9.0 504 130 5.1 174 6.8 1,170 2,579
Z65-280-100 10.0 560 124 4.9 174 6.8 1,240 2,734


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