911 Torsion bar to coil conversion chart
 
Front Rates  
Torsion Kw (lb/in) Ks (lb/in)
Dia (mm) (Wheel) (Spring)
16 77 90
17 97 112
18 122 138
18.5 137 154
19 152 170
20 187 207
21 227 249
22 273 298
23 327 355
Rear Rates    
Torsion Kw (lb/in) Ks (lb/in)
Dia (mm) (Wheel) (Spring)
23 107 107
24 127 127
25 149 147
26 174 171
27 202 198
28 234 229
29 269 262
30 308 300
31 351 340