What is the S10 bolt pattern?
The S10 bolt pattern is a 5-lug setup on a 4.75-inch diameter circle, commonly written as 5x4.75, with a typical hub bore around 66.0 mm. This pattern is standard for Chevrolet S-10 and GMC Sonoma pickups and related S-series models of their era.
Understanding this pattern helps when shopping for wheels, tires, or adapters. While most S-10/Sonoma vehicles share this 5x4.75 pattern, variations can exist by year, trim, or aftermarket modifications. This guide explains the basics, what years it covers, and practical checks to ensure proper fitment.
Bolt pattern basics
These core details describe the S10 wheel bolt configuration and related dimensions you’ll encounter when selecting wheels or adapters.
What the numbers mean
The notation 5x4.75 inches means five lug holes evenly spaced on a circle with a diameter of 4.75 inches (about 121 mm). The center bore, which centers the wheel on the hub, is typically around 66.0 mm for these vehicles. Understanding these figures helps determine whether a wheel will bolt up and center correctly without spacers or rings.
- Pattern: 5 lug holes
- Circle diameter: 4.75 inches (121 mm)
- Common center bore: 66.0 mm
- Typical wheel compatibility: S-10 and Sonoma pickups and related S-series models
Knowing these basics helps you compare wheels and identifies when hub rings or spacers might be needed. If a wheel’s bolt pattern isn’t 5x4.75, additional adapters are usually required, which can affect alignment and safety.
Year range and hub sizing
In practice, the 5x4.75 pattern with a 66.0 mm center bore applies to the Chevrolet S-10 and GMC Sonoma vehicles produced during the era they share. This section clarifies how broad the compatibility is and what to verify for your exact vehicle.
Year-by-year snapshot
Most S-10 and Sonoma pickups built roughly from the early 1980s through the mid-2000s use the 5x4.75 pattern with a 66.0 mm hub bore. While this pattern covers the majority of these trucks, it’s still essential to confirm for your specific year, trim, and any aftermarket modifications. Some limited packages or aftermarket wheels may present rare deviations, so always verify with your VIN or wheel specification panel.
- Vehicles involved: Chevrolet S-10 and GMC Sonoma (and related S-series light trucks) from approximately 1982 to 2004
- Standard pattern: 5x4.75 inches
- Center bore: typically around 66.0 mm
- Note: verify exact year/model if buying used wheels or adapters; variations can occur with certain trims or aftermarket parts
If you’re swapping wheels across this family of vehicles, the 5x4.75 pattern is your baseline. Always confirm specific part numbers and tolerances for your exact build to avoid interference with brakes or suspension components.
Practical wheel-fitting tips
Before buying wheels or adapters, use these checks to ensure a proper, safe fitment on an S10/Sonoma.
Step-by-step checks
These practical steps help you avoid common fitment pitfalls and ensure you don’t end up with wheels that won’t seat or align correctly.
- Measure the bolt pattern on your wheel hub to confirm 5x4.75 inches (or 120.65 mm, rounded).
- Check the center bore on the wheel and vehicle hub; if the wheel bore is larger, consider hub-centric rings to prevent vibration or runout.
- Verify compatibility with brake calipers and rotor thickness; some aftermarket wheels may rub if brakes are oversized for the wheel’s width or offset.
- Confirm wheel offset and backspacing match your vehicle’s requirements to avoid clearance issues with suspension components or fenders.
- Ensure lug nut type and thread size match the wheel studs and use the correct torque specification for safe seating (consult the vehicle’s manual or a trusted wheel shop).
When in doubt, consult a wheel specialist or your dealer to verify compatibility for your exact year, trim, and any aftermarket parts. A quick fitment check can save time and money.
Related models sharing the pattern
The S10/Sonoma family commonly shares its bolt pattern with other GM light trucks and SUVs from the same era. If you’re assessing cross-compatibility, confirm with the specific model/year before purchasing.
GM pattern family
Other GM vehicles from the same era often used the same 5x4.75 pattern, especially within the S-series family or closely related platforms. Always verify for your exact model-year combination to avoid mismatches.
- Chevrolet S-10
- GMC Sonoma
- Related S-series trucks and compatible models
Shared pattern does not guarantee direct compatibility—differences in hub bore, brake caliper clearance, and suspension geometry can affect fitment. Always double-check before buying wheels from another model.
Summary
The S10 bolt pattern is a 5-lug setup on a 4.75-inch diameter circle (5x4.75) with a typical hub bore of 66.0 mm, standard for Chevrolet S-10 and GMC Sonoma pickups and their S-series relatives. This pattern covers most models from the early 1980s through the mid-2000s, but always verify for your exact year, trim, and aftermarket parts. When shopping for wheels, measure the pattern, check center bore, and confirm clearance with brakes and suspension to ensure a safe, proper fit.
In the end, knowing the 5x4.75 pattern and 66.0 mm bore is the starting point for wheel compatibility on S10/Sonoma vehicles. With careful verification, owners can find wheels that fit correctly without costly modifications.
What lug pattern is a Chevy S10?
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