1978 GMC Caballero Wheels & Rims
Shop Wheels for 1978 GMC Caballero
Showing 8 of 8+ wheels compatible with the 1978 GMC Caballero
The 1978 GMC Caballero Base, Diablo, and Laredo models roll on a 5x120.65 bolt pattern with a 14x6 stock wheel. ThreePiece.us stocks wheels specifically verified to bolt directly onto your Caballero, from brands like American Racing, US Mag 1PC, and Performance Replicas. Every wheel we offer for your truck ships free to the lower 48 states.
Upgrading your Caballero's stance opens up options from 14 to 18 inches, with multiple widths available at each size. Whether you're after classic style or modern performance, our selection includes WELD, Forgestar, Ridler, Vision, and E5 Wheels—all confirmed to fit your truck's specifications. Start browsing wheels that are ready to bolt on and ship free.
1978 GMC Caballero Wheel Fitment Guide — What Works & What to Avoid
Your 1978 GMC Caballero fastens wheels with a 5x120.65 bolt pattern. The factory setup runs 14x6 wheels at a 5 offset. You can upgrade to 15-inch, 16-inch, 17-inch, or 18-inch sizes, with widths ranging from 6 to 8.5 inches depending on diameter. Since this truck isn't staggered, front and rear can match without compromise.
The 5x120.65 bolt pattern is exclusive to this fitment—no other pattern will work. Your hub measures 70.3 millimeters; if a wheel's center bore exceeds that, use hub-centric rings to ensure proper seating. Aggressive offsets or very wide wheels risk contact with fenders and suspension components, so stick with the sizes listed here to avoid rubbing issues.
Every wheel we stock for your Caballero bolts on securely and ships free throughout the lower 48 states. American Racing, US Mag 1PC, Performance Replicas, Vision, E5 Wheels, WELD Performance, Forgestar, and Ridler all carry fitments ready to ship.
1978 GMC Caballero Wheel Fitment Specifications
The 5x120.65 bolt pattern determines which wheels physically bolt onto your truck, while the 70.3mm center bore ensures a hub-centric fit. The factory equips this truck with 14x6 wheels at a +5 offset.
Lug Type
nut
Thread Size
M12x1.5
Torque Spec
74 ft-lbs
TPMS
No
1978 GMC Caballero Compatible Wheel Sizes
| Wheel Size | Offset Range | Compatible Tires | Notes |
|---|---|---|---|
| 14x6 | -23 to +20 | 215/75R14 | — |
| 15x7 | -23 to +20 | 215/70R15, 215/75R15, 225/70R15 | — |
| 16x7.5 | -23 to +20 | 215/65R16, 215/70R16, 235/60R16 | — |
| 17x7.5 | -23 to +20 | 215/60R17, 225/55R17, 225/60R17 | — |
| 15x8 | -23 to +20 | 215/70R15, 215/75R15, 225/70R15 | — |
| 16x8 | -23 to +20 | 235/60R16, 215/65R16, 215/70R16 | — |
| 17x8 | -23 to +20 | 225/55R17, 225/60R17, 215/60R17 | — |
| 18x8 | -23 to +20 | 255/55R18 | — |
| 15x8.5 | -23 to +20 | 215/70R15, 215/75R15, 225/70R15 | — |
| 17x8.5 | -23 to +20 | 225/55R17, 225/60R17, 235/60R17 | — |
| 18x8.5 | -23 to +20 | 255/55R18 | — |
| 18x8.5 | -23 to +20 | 285/50R18 | 1. Check fitment, possible clearance issues |
| 20x8.5 | -23 to +20 | 255/50R20, 265/45R20 | 1. Check fitment, possible clearance issues |
| 20x8.5 | -15 to +20 | 275/45R20 | 1. Check fitment, possible clearance issues |
| 18x9 | -15 to +18 | 285/50R18 | 1. Check fitment, possible clearance issues |
| 20x9 | -15 to +18 | 255/50R20 | 2. Body Modification Required |
| 20x9 | -15 to +18 | 265/45R20, 275/45R20 | 2. Body Modification Required |
| 22x9.5 | -15 to +18 | 265/35R22, 295/30R22, 285/35R22 | 2. Body Modification Required |
Best Wheel Brands for the GMC Caballero
- Fuel 1PC — Maverick, Assault, Blitz
- Fuel Forged — FF12, FF19
- Method Race Wheels — MR305, MR701
- American Racing — AR924, VN507
- Heritage Wheel
Complete Your 1978 GMC Caballero Build
- GMC Caballero suspension upgrades — pairs well with a wheel upgrade
- GMC Caballero exhaust systems — pairs well with a wheel upgrade
- GMC Caballero suspension — pairs well with a wheel upgrade
- GMC Caballero brakes — pairs well with a wheel upgrade
- Wheel & tire packages — pre-mounted, balanced, shipped ready to bolt on
- Installation accessories — hub rings, extended studs, TPMS kits, spacers