1993 GMC Rally Wagon 1500 Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1993 GMC Rally Wagon 1500, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | 14x1.5 |
| Center Bore (CB) | 78.1 mm |
| Offset (ET) | 20-30 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
1993 Rally Wagon 1500 — Year-Specific Fitment Context
The 1993 model year is the final year of the GMC Rally Wagon 1500's 6x139.7 bolt pattern run (since 1992). Wheels from any 1992–1993 GMC Rally Wagon 1500 are cross-compatible with the 1993 model.
GMC Rally Wagon 1500 Bolt Pattern by Year
The table below shows how the Rally Wagon 1500's wheel specifications have changed over the years. The 1993 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1992 | 6x139.7 | 78.1 | 20-30 |
| ▸ 1993 | 6x139.7 | 78.1 | 20-30 |
6x139.7 Pattern Context
This bolt pattern appears on 1067 vehicles in our current database and is considered common.
Examples of other vehicles using 6x139.7:
Expert Buying Guide for 1993 GMC Rally Wagon 1500
For your 1993 GMC Rally Wagon 1500, the 6x139.7 bolt pattern and 78.1mm center bore are critical. Aftermarket wheels often have a larger center bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. Offset must stay within 20-30mm; deviations risk rubbing on suspension or fenders. Always use 14x1.5 lug nuts with the correct seat type (cone or ball) matching the wheel. Improper seating can cause wheel loss. Verify wheel load rating exceeds vehicle weight. This final year of the 6x139.7 pattern shares compatibility with 1992 models, but always test fit before purchase.
Historical Fitment Data Reference
In our dataset, GMC Rally Wagon 1500 appears from 1992 to 1993 (2 model years). Across recorded model years, this model generally keeps the same bolt pattern.
- Observed bolt-pattern variants for this model: 1
- Observed center-bore variants for this model: 1
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 50.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts after 50-100 miles of driving to maintain clamping force.
- ✅ Avoid using universal fit wheels without hub-centric rings; they can cause steering wheel shake.
- ✅ Check for caliper clearance with aftermarket wheels, as the 1993 Rally Wagon has large front brakes.
- ⚠️ This fitment uses a wide offset range. Check brake clearance and fender clearance before buying wheels.
- ⚠️ Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
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1993 GMC Rally Wagon 1500 — Frequently Asked Questions
What is the bolt pattern for a 1993 GMC Rally Wagon 1500?
The 1993 GMC Rally Wagon 1500 uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 20-30mm.
What other years of GMC Rally Wagon 1500 have the same bolt pattern as the 1993?
The GMC Rally Wagon 1500 uses the 6x139.7 pattern from 1992 through 1993. Wheels from any of these model years are dimensionally compatible with the 1993, provided the offset and center bore also match.
What lug nut size does the 1993 GMC Rally Wagon 1500 use?
The 1993 GMC Rally Wagon 1500 uses 14x1.5 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
What is the factory wheel offset for a 1993 GMC Rally Wagon 1500?
The OEM offset for the 1993 Rally Wagon 1500 is typically around 20-30mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
Can I put aftermarket wheels on my 1993 GMC Rally Wagon 1500?
Absolutely. Just ensure the aftermarket wheels have a 6x139.7 bolt pattern, an offset near 20-30mm, and a center bore of at least 78.1mm (using hub rings if larger).
What is the center bore of a 1993 GMC Rally Wagon 1500?
The factory center bore (hub bore) for the 1993 GMC Rally Wagon 1500 is 78.1mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
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