1999 Chevrolet Blazer Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1999 Chevrolet Blazer, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x120.65 (5x4.75") |
|---|---|
| Lug Nut / Bolt Size | N 12x1.50 |
| Center Bore (CB) | 70.3 mm |
| Offset (ET) | 10 |
| Torque Specs | 80 ft-lbs (108 Nm) |
Imperial Match: 5x120.65 is commonly referred to as 5x4.75" in US Standard.
1999 Blazer — Year-Specific Fitment Context
The 1999 Chevrolet Blazer is in year 8 of 14 using the 5x120.65 pattern (1992–2005). Wheels from any 1992–2005 Chevrolet Blazer are cross-compatible with the 1999 model. Across its full production run (1992–2024), the Blazer has also used: 6x120.
Chevrolet Blazer Bolt Pattern by Year
The table below shows how the Blazer's wheel specifications have changed over the years. The 1999 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1992 | 5x120.65 | 70.3 | 10 |
| 1993 | 5x120.65 | 70.3 | 10 |
| 1994 | 5x120.65 | 70.3 | 10 |
| 1995 | 5x120.65 | 70.3 | 10 |
| 1996 | 5x120.65 | 70.3 | 10 |
| 1997 | 5x120.65 | 70.3 | 10 |
| 1998 | 5x120.65 | 70.3 | 10 |
| ▸ 1999 | 5x120.65 | 70.3 | 10 |
| 2000 | 5x120.65 | 70.3 | 10 |
| 2001 | 5x120.65 | 70.3 | 10 |
| 2002 | 5x120.65 | 70.3 | 10 |
| 2003 | 5x120.65 | 70.3 | 10 |
| 2004 | 5x120.65 | 70.3 | 10 |
| 2005 | 5x120.65 | 70.3 | 10 |
| 2019 | 6x120 | 66.9 | 50 |
| 2020 | 6x120 | 66.9 | 50 |
| 2021 | 6x120 | 66.9 | 50 |
| 2022 | 6x120 | 66.9 | 50 |
| 2023 | 6x120 | 66.9 | 50 |
| 2024 | 6x120 | 66.9 | 50 |
5x120.65 Pattern Context
This bolt pattern appears on 202 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x120.65:
Expert Buying Guide for 1999 Chevrolet Blazer
For your 1999 Chevrolet Blazer, the 5x120.65 bolt pattern is shared with 1992–2005 models, ensuring cross-compatibility. The 70.3mm center bore is critical: aftermarket wheels with a larger bore require hub-centric rings to prevent vibration and ensure proper load distribution. Offset is sensitive—stick to a 10mm range (0–20mm) to avoid rubbing or clearance issues. Always use lug nuts with the correct thread pitch (12x1.50) and seat type (cone seat). Ball-seat nuts can cause wheel loosening and are unsafe. Re-torque after 50–100 miles.
Historical Fitment Data Reference
In our dataset, Chevrolet Blazer appears from 1992 to 2024 (20 model years). Across model years, this model appears with 2 bolt patterns (5x120.65, 6x120).
- Observed bolt-pattern variants for this model: 2
- Observed center-bore variants for this model: 2
- Observed lug-size variants for this model: 2
- Observed total offset span across years: 40.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 100 ft-lb after 50–100 miles of driving.
- ✅ Avoid wheels with offset beyond 20mm; they may rub suspension or fenders.
- ✅ Check that aftermarket wheels include hub-centric rings for the 70.3mm bore.
- ⚠️ Verify thread pitch before installation; M12x1.25 and M12x1.5 are not interchangeable.
- ⚠️ Torque lugs in a star pattern to 80 ft-lbs (108 Nm), then re-check torque after 50-100 km (30-60 miles).
- ⚠️ This model has multiple bolt-pattern records across years. Match wheels to exact year/trim before purchase.
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1999 Chevrolet Blazer — Frequently Asked Questions
What is the bolt pattern for a 1999 Chevrolet Blazer?
The 1999 Chevrolet Blazer uses a 5x120.65 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 10mm.
What other years of Chevrolet Blazer have the same bolt pattern as the 1999?
The Chevrolet Blazer uses the 5x120.65 pattern from 1992 through 2005. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
Can I put aftermarket wheels on my 1999 Chevrolet Blazer?
Absolutely. Just ensure the aftermarket wheels have a 5x120.65 bolt pattern, an offset near 10mm, and a center bore of at least 70.3mm (using hub rings if larger).
What is the factory wheel offset for a 1999 Chevrolet Blazer?
The OEM offset for the 1999 Blazer is typically around 10mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
How tight should I torque the lug nuts on a 1999 Chevrolet Blazer?
Refer to your owner's manual for exact specs, but always tighten the N 12x1.50 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
Why is matching the 70.3mm center bore important for the 1999 Blazer?
The 70.3mm center bore ensures the wheel is perfectly centered on the hub. If the wheel is lug-centric instead of hub-centric, you may experience steering wheel vibration at highway speeds.
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