Hyperco 2.25″ I.D. x 6″ Free Length Coilover Spring, 200-2000lbs/in Rate (Choose Rate)
$101.65
Hyperco 2.25″ I.D. x 6″ Free Length Coilover Springs
Hyperco high-performance coil-over springs, or “Hypercoils” are the benchmark in motorsport suspension. These 2.25″ (57.1 mm) inside diameter, 6″ (152.4 mm) free length springs (Hyperco A series) are precision CNC-wound from premium high-tensile alloy steel and 100% load-tested for accurate, repeatable spring rates that hold true throughout their travel — so the rate on the label is the rate on the car.
Compared to conventional suspension springs, Hyperco coil-over springs provide more usable deflection and weigh less, reducing unsprung and overall vehicle weight. The 2.25″ I.D. suits coilover kits and threaded-body shocks built around a 2.25″ I.D. spring seat (verify your perch/slider).
Choose Your Spring Rate
Select your required spring rate from the dropdown. This 2.25″ x 6″ family is offered in rates from 200 lbs/in (35 N/mm) up through 2000 lbs/in (350 N/mm). Use the rate specified by your chassis setup sheet or suspension tuner. Each spring is sold individually; most applications use them in matched pairs.
Specifications by Rate (Imperial & Metric)
All springs: 2.25″ (57.1 mm) I.D., 6″ (152.4 mm) free length, A series, blue powder-coat finish. Deflection, max load, outside diameter, and solid height vary by rate:
| SKU | Rate (lbs/in) | Rate (N/mm) | Deflection (in) | Deflection (mm) | Max Load (lb) | Max Load (kg) | O.D. (in) | O.D. (mm) | Solid Ht. (in) | Solid Ht. (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| 186A0200 | 200 | 35.0 | 4.229 | 107.4 | 845 | 383 | 3.091 | 78.5 | 1.771 | 45.0 |
| 186A0225 | 225 | 39.4 | 3.751 | 95.3 | 843 | 382 | 3.04 | 77.2 | 2.249 | 57.1 |
| 186A0250 | 250 | 43.8 | 3.94 | 100.1 | 985 | 447 | 3.0 | 76.2 | 2.06 | 52.3 |
| 186A0275 | 275 | 48.2 | 4.082 | 103.7 | 1123 | 509 | 3.142 | 79.8 | 1.918 | 48.7 |
| 186A0300 | 300 | 52.5 | 3.86 | 98.0 | 1158 | 525 | 3.034 | 77.1 | 2.14 | 54.4 |
| 186A0325 | 325 | 56.9 | 3.818 | 97.0 | 1241 | 563 | 3.05 | 77.5 | 2.182 | 55.4 |
| 186A0350 | 350 | 61.3 | 3.95 | 100.3 | 1382 | 627 | 3.152 | 80.1 | 2.05 | 52.1 |
| 186A0375 | 375 | 65.7 | 3.822 | 97.1 | 1433 | 650 | 3.26 | 82.8 | 2.178 | 55.3 |
| 186A0400 | 400 | 70.1 | 3.877 | 98.5 | 1550 | 703 | 3.23 | 82.0 | 2.123 | 53.9 |
| 186A0425 | 425 | 74.4 | 3.825 | 97.2 | 1626 | 738 | 3.224 | 81.9 | 2.175 | 55.2 |
| 186A0450 | 450 | 78.8 | 3.787 | 96.2 | 1704 | 773 | 3.241 | 82.3 | 2.213 | 56.2 |
| 186A0475 | 475 | 83.2 | 3.487 | 88.6 | 1656 | 751 | 3.142 | 79.8 | 2.513 | 63.8 |
| 186A0500 | 500 | 87.6 | 3.703 | 94.1 | 1852 | 840 | 3.303 | 83.9 | 2.297 | 58.3 |
| 186A0525 | 525 | 91.9 | 3.658 | 92.9 | 1921 | 871 | 3.232 | 82.1 | 2.342 | 59.5 |
| 186A0550 | 550 | 96.3 | 3.64 | 92.5 | 2001 | 908 | 3.279 | 83.3 | 2.36 | 59.9 |
| 186A0575 | 575 | 100.7 | 3.621 | 92.0 | 2082 | 944 | 3.327 | 84.5 | 2.379 | 60.4 |
| 186A0600 | 600 | 105.1 | 3.556 | 90.3 | 2133 | 968 | 3.253 | 82.6 | 2.444 | 62.1 |
| 186A0625 | 625 | 109.5 | 3.552 | 90.2 | 2219 | 1007 | 3.322 | 84.4 | 2.448 | 62.2 |
| 186A0650 | 650 | 113.8 | 3.546 | 90.1 | 2304 | 1045 | 3.391 | 86.1 | 2.454 | 62.3 |
| 186A0675 | 675 | 118.2 | 3.273 | 83.1 | 2209 | 1002 | 3.226 | 81.9 | 2.727 | 69.3 |
| 186A0700 | 700 | 122.6 | 3.468 | 88.1 | 2427 | 1101 | 3.411 | 86.6 | 2.532 | 64.3 |
| 186A0750 | 750 | 131.3 | 3.394 | 86.2 | 2545 | 1154 | 3.308 | 84.0 | 2.606 | 66.2 |
| 186A0800 | 800 | 140.1 | 3.36 | 85.3 | 2688 | 1219 | 3.358 | 85.3 | 2.64 | 67.1 |
| 186A0850 | 850 | 148.9 | 3.33 | 84.6 | 2830 | 1284 | 3.388 | 86.1 | 2.67 | 67.8 |
| 186A0900 | 900 | 157.6 | 3.257 | 82.7 | 2931 | 1329 | 3.412 | 86.7 | 2.743 | 69.7 |
| 186A0950 | 950 | 166.4 | 3.21 | 81.5 | 3049 | 1383 | 3.427 | 87.0 | 2.79 | 70.9 |
| 186A1000 | 1000 | 175.1 | 3.221 | 81.8 | 3221 | 1461 | 3.481 | 88.4 | 2.779 | 70.6 |
| 186A1050 | 1050 | 183.9 | 3.155 | 80.1 | 3312 | 1502 | 3.523 | 89.5 | 2.845 | 72.3 |
| 186A1100 | 1100 | 192.6 | 3.123 | 79.3 | 3435 | 1558 | 3.364 | 85.4 | 2.877 | 73.1 |
| 186A1150 | 1150 | 201.4 | 3.112 | 79.0 | 3579 | 1623 | 3.5 | 88.9 | 2.888 | 73.4 |
| 186A1200 | 1200 | 210.2 | 3.099 | 78.7 | 3719 | 1687 | 3.559 | 90.4 | 2.901 | 73.7 |
| 186A1250 | 1250 | 218.9 | 3.04 | 77.2 | 3800 | 1724 | 3.492 | 88.7 | 2.96 | 75.2 |
| 186A1300 | 1300 | 227.7 | 2.999 | 76.2 | 3898 | 1768 | 3.54 | 89.9 | 3.001 | 76.2 |
| 186A1400 | 1400 | 245.2 | 2.883 | 73.2 | 4036 | 1831 | 3.42 | 86.9 | 3.117 | 79.2 |
| 186A1500 | 1500 | 262.7 | 2.868 | 72.8 | 4301 | 1951 | 3.517 | 89.3 | 3.132 | 79.6 |
| 186A1600 | 1600 | 280.2 | 2.722 | 69.1 | 4355 | 1975 | 3.454 | 87.7 | 3.278 | 83.3 |
| 186A1700 | 1700 | 297.7 | 2.795 | 71.0 | 4752 | 2155 | 3.533 | 89.7 | 3.205 | 81.4 |
| 186A1800 | 1800 | 315.2 | 2.704 | 68.7 | 4867 | 2208 | 3.5 | 88.9 | 3.296 | 83.7 |
| 186A1900 | 1900 | 332.7 | 2.336 | 59.3 | 4438 | 2013 | 3.55 | 90.2 | 3.664 | 93.1 |
| 186A2000 | 2000 | 350.3 | 2.323 | 59.0 | 4647 | 2108 | 3.55 | 90.2 | 3.677 | 93.4 |
Metric values are converted from Hyperco’s published imperial specifications (1 lb/in = 0.175 N/mm; 1 in = 25.4 mm; 1 lb = 0.454 kg) and rounded.
Features
- Nominal 2.25″ (57.1 mm) inside diameter, 6″ (152.4 mm) free length
- Hyperco A series, blue powder-coat finish
- Precision CNC-wound, 100% rate-tested and validated
- High-tensile alloy steel; corrosion-resistant finish
- Lifetime warranty against loss of free height beyond Hyperco spec
- Proudly made in the USA — trusted in NASCAR, IndyCar, and pro road racing
Need a rate not shown, a different free length or I.D.? Contact us — we can get the full Hyperco range.
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