Fitting the perfect tire on a lowered 1973–1987 C10 requires balancing drop amount, wheel offset, and tire size. Here’s what works for the most popular lowered C10 builds.
Stock Tire Size Reference:
The factory C10 ran 215/75R15 or 235/75R15 tires on 15x6 or 15x7 steel wheels.
Common Lowered C10 Builds and Tire Fitment:
Mild Drop (2/3 or 2/4 with Drop Spindles):
- 235/60R15 on 15x8 wheels – Classic mini-truck look
- 255/60R15 on 15x8 wheels – More tire, same wheel
- 245/50R16 or similar on aftermarket 16" – Modern look
Moderate Drop (3/4 to 4/6):
- 225/55R18 – Popular on 18" wheel builds
- 255/50R18 on 18x9 wheels
- 245/45R20 on 20x8.5 wheels
Slammed/Bagged:
- 215/65R15 or 225/60R15 – Small tire for extreme tuck
- 255/50R16 – Common on bagged C10 show trucks
Wheel Offset is Critical:
The most important fitment variable is wheel backspacing/offset.
- Too much backspace: Tire hits inner fender, shocks, or springs
- Too little backspace: Tire sticks out past fender (may rub at full lock)
- Sweet spot for most builds: 4.5"–5.5" backspacing on 15" wheels, or +10mm to +25mm offset on metric sizing
Fitment Tips:
- Use cardboard spacers to mock up fitment before ordering wheels
- Turn wheel full lock in both directions to check clearance
- The front has less room than the rear on lowered builds
- More aggressive drops may require tubbing or fender rolling
The Classic Look:
Most restomod C10 builds use a staggered setup: narrower tire in front (235/55R17 or similar) and wider in the rear (275/50R17 or 305/50R17).
What size tires are you running on your lowered C10?