RC Shock Oil Weight Converter
Convert between weight (wt), centistokes (cSt), and brand numbering for Mugen, Yokomo, Hudy, and others.
22% off Cobra 10 Brushless Combo
$275 → $214 · save $61 at AMain
Equivalents
Centistokes (cSt)
350
Weight (wt)
AE / Losi / Pro-Line / Trinity / MIP / JConcepts
35 wt
Mugen
350
Yokomo / Hudy / AKA
350
Cross-reference values are approximate — brand-to-brand viscosity varies a few percent even at the same labeled value. For race-pace tuning, dial in by feel from this starting point.
Changing weights?
Shop shock oil at AMain →
How to convert RC shock oil cSt to weight (wt)
To convert RC shock oil from centistokes to weight, divide the cSt value by 10. To go the other way, multiply weight by 10. For example, 500 cSt = 50 wt, 1,000 cSt = 100 wt, and 30 wt = 300 cSt. This is the convention used by most US brands (Associated, Losi, Pro-Line, Trinity, MIP, JConcepts); Mugen, Yokomo, Hudy, and AKA already label their oil in cSt directly.
Starting-point shock oil by class
Conservative pro-setup averages. Adjust for grip, track temp, and your driving style.
| Class | Front | Rear |
|---|---|---|
| 1/10 2WD modified buggy | 30–40 wt (300–400 cSt) | 30–40 wt (300–400 cSt) |
| 1/10 4WD modified buggy | 35–45 wt (350–450 cSt) | 30–40 wt (300–400 cSt) |
| 1/10 SCT (stadium truck) | 35–45 wt (350–450 cSt) | 30–40 wt (300–400 cSt) |
| 1/8 nitro/e-buggy | 40–50 wt (400–500 cSt) | 35–45 wt (350–450 cSt) |
| 1/8 truggy | 45–55 wt (450–550 cSt) | 40–50 wt (400–500 cSt) |
| 1/10 on-road touring | 30–45 wt (300–450 cSt) | 30–45 wt (300–450 cSt) |
| 1/10 oval / drag | 20–30 wt (200–300 cSt) | 20–30 wt (200–300 cSt) |
Full cross-reference chart
Tap a row to load it above.
| cSt | Weight (wt) | Mugen / Yokomo / Hudy |
|---|---|---|
| 100 | 10 wt | 100 |
| 125 | 12.5 wt | 125 |
| 150 | 15 wt | 150 |
| 200 | 20 wt | 200 |
| 250 | 25 wt | 250 |
| 300 | 30 wt | 300 |
| 350 | 35 wt | 350 |
| 400 | 40 wt | 400 |
| 450 | 45 wt | 450 |
| 500 | 50 wt | 500 |
| 550 | 55 wt | 550 |
| 600 | 60 wt | 600 |
| 650 | 65 wt | 650 |
| 700 | 70 wt | 700 |
| 750 | 75 wt | 750 |
| 800 | 80 wt | 800 |
| 850 | 85 wt | 850 |
| 900 | 90 wt | 900 |
| 1000 | 100 wt | 1000 |
| 1100 | 110 wt | 1100 |
| 1200 | 120 wt | 1200 |
| 1300 | 130 wt | 1300 |
| 1500 | 150 wt | 1500 |
| 1750 | 175 wt | 1750 |
| 2000 | 200 wt | 2000 |
How RC shock oil viscosity is labeled
- • Centistokes (cSt) is the actual viscosity unit used by oil manufacturers.
- • Weight (wt) is an older convention — most US brands (AE, Losi, Pro-Line, Trinity, MIP, JConcepts) approximate
cSt × 0.1. So "30 wt" ≈ 300 cSt. - • Mugen, Yokomo, Hudy, AKA label oil in cSt directly. Mugen 400 = 400 cSt.
- • Brand-to-brand viscosities at the same label vary a few percent — close enough to start, then dial in by feel.
- • Higher cSt = stiffer damping, slower shock movement. Lower cSt = faster, more compliant.
More RC Calculators
Free RC tools to dial in your car between rounds.
RC Gear Ratio Calculator
Pinion + spur + internal ratio → final drive ratio, rollout, and chart of nearby combos.
RC Speed Calculator
Motor KV, battery voltage, gearing, and tire size → top speed of any electric RC car.
RC Gear Ratio Chart Maker
Build a printable pinion/spur chart for any class — gear ratio (FDR) or rollout (mm). 1/10, 1/12 pan, 1/8 presets included.
RC Corner Weight Calculator
Enter per-wheel weights to compute cross weight and balance — critical for oval and on-road tuning.
RC Battery Runtime Calculator
How long will your LiPo last? Estimate runtime by class and driving style.
RC Pill Insert Calculator
Diff insert geometry for 1/8 buggies — match your gear-diff pill setup to your conditions.
Mini-Z Wheel Offset Calculator
Fitting an AutoScale body to a Kyosho Mini-Z? Get the exact wheel offset for any width, plus a wheelbase & motor-mount reference.
Free app
Have this converter — plus 6 more — on your phone at the track
Pit Calc Pro for iOS & Android.
