Fitment guides / Ram
2018 Ram 1500 fitment guide
Bolt pattern, offset, hub bore and the biggest tire that clears at each lift height, plus real builds from owners.
Factory numbers below are community figures pending verification against the factory placard.
Bolt pattern
5x139.7
Hub bore
77.8 mm
Lug thread
M14x1.5
Stock wheel
17/20" x 8"
Stock offset
+20 mm
Stock tire
32"
Biggest tire by lift
| Lift | Max tire diameter | Typical size |
|---|---|---|
| Stock | 33" | 33x12.50R20 |
| 2" level | 34" | 34x12.50R20 |
| 3.5" lift | 34.5" | 34x12.50R20 |
| 6" lift | 37" | 37x12.50R20 |
Popular combos, predicted
Geometry-based. Owner builds below confirm or correct these.
| Wheel | Tire | Lift | Stance | Poke | Rubbing |
|---|---|---|---|---|---|
| 20x9 +18 | 33x12.50R20 | Stock | Flush | +15 mm | No rubbing |
| 20x10 -18 | 33x12.50R20 | 2" level | Aggressive | +63 mm | Slight rub at full turn |
| 20x10 -18 | 35x12.50R20 | 2" level | Aggressive | +63 mm | Rubs at full turn |
| 20x10 -18 | 35x12.50R20 | 3.5" lift | Aggressive | +63 mm | Slight rub at full turn |
| 20x12 -44 | 35x12.50R20 | 3.5" lift | Aggressive | +115 mm | Slight rub at full turn |
| 20x12 -44 | 37x13.50R20 | 6" lift | Aggressive | +115 mm | Slight rub at full turn |
Tap a row to see that setup.
2018 Ram 1500 on 20x9 +18 · 33x12.50R20 · Stock
Real builds from around the web. Photos belong to their owners and are credited by name.
Ram 1500 builds
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