Swift metric coilover springs are measured and rated in the metric system using kg/mm. The rating system is used widely in the sports compact market, and therefore we want to provide an easy understanding for the suspension tuners.
Detailed specs can be found in this PDF
For those familiar with N/mm or lbs/in units for indicating springs rate, the table below can be used as a reference.
| kg/mm |
N/mm |
lbs/in |
| 4 |
39 |
224 |
| 5 |
49 |
280 |
| 6 |
59 |
336 |
| 7 |
69 |
392 |
| 8 |
78 |
448 |
| 9 |
88 |
504 |
| 10 |
98 |
560 |
| 11 |
108 |
616 |
| 12 |
118 |
672 |
| 13 |
127 |
728 |
| 14 |
137 |
784 |
| 15 |
147 |
840 |
| 16 |
157 |
896 |
| 17 |
167 |
952 |
| 18 |
177 |
1008 |
| 19 |
186 |
1064 |
| 20 |
196 |
1120 |
| 22 |
216 |
1232 |
| 24 |
235 |
1344 |
| 26 |
255 |
1456 |
| 28 |
275 |
1568 |
| 30 |
294 |
1680 |
| 32 |
314 |
1792 |
| 34 |
333 |
1904 |
