2019 Chevrolet Blazer Wheel Interchange

2019 Chevrolet Blazer Wheel Fitment Guide - wheelinterchange.com

Known OEM Fitment For 2019 Chevrolet Blazer

The values below reflect known factory specifications for at least one 2019 Chevrolet Blazer configuration. Other factory sizes may exist by trim or package. Always verify your specific vehicle using the tire placard on the driver door jamb, your owner’s manual, or an OEM parts database before purchasing.

If your vehicle shows different OEM wheel or tire sizes, use those as your baseline in the on-page calculator and follow OEM guidance.

How To Use The Wheel Interchange Calculator

• Set “Installed on (your vehicle)” to 2019 Chevrolet Blazer. Confirm the baseline by matching your door-jamb placard. If your placard differs from 235/65R18, input your actual size.
• Pick a “Wheels from (donor vehicle)” to compare. The calculator will show changes in inner clearance, outer poke, backspacing, and speedometer effect.
• Use “Custom wheel size” to try different rim width, diameter, and offset. Use “Custom tire size” to adjust section width and aspect ratio. Changing rim diameter updates tire diameter and comparison readouts.
• Watch for:
  • Inner clearance - risk of rubbing struts, control arms, or liners.
  • Outer poke - risk of fender contact or debris spray.
  • Overall tire diameter and speedometer change - keep within about 1 to 3 percent of stock unless reprogramming.
  • Backspacing and offset relative to the +50 mm OEM reference.
• Use the results to shortlist candidates, then always physically test fit before mounting tires.

Fitment Checklist Before You Buy

• Bolt pattern - Must be 6x120.
• Center bore - Wheel bore must be 66.9 mm or larger. If larger, use hub-centric rings 66.9 mm ID to your wheel’s bore OD.
• Fasteners - Thread size M12 x 1.5. Verify seat type that your wheel requires (common types are 60 degree conical or ball seat). Do not mix seat types.
• Offset and backspacing - Compare to the OEM reference +50 mm and 5.97 in backspacing using the calculator. Ensure inner and outer clearance remain safe.
• Brake caliper and spoke clearance - Inspect with a bare wheel test fit. Rotate lock-to-lock and check at full suspension compression.
• Tire load index and speed rating - Must meet or exceed the door-jamb placard.
• TPMS - Plan to transfer sensors or install compatible new sensors and perform relearn per the owner’s manual.
• Ride height and alignment - After changing wheels or tires, get an alignment and verify no rubbing under load, turns, and bumps.
• Spare tire and tool kit - Ensure compatibility or note limitations.
• Documentation - Confirm part numbers and specs with OEM sources or the wheel manufacturer before mounting tires.

Plus Sizing And Common Upgrades

Plus sizing changes the wheel diameter and width while selecting a tire that keeps overall diameter close to stock. For best results on ABS, traction control, gearing, and speedometer accuracy, keep total tire diameter within about 1 to 3 percent of your verified OEM size. Use the calculator to validate.

• Plus one - Typically 1 inch larger wheel diameter with a lower-profile tire. Check inner and outer clearance and maintain appropriate load index.
• Plus two - 2 inches larger wheel diameter. This often reduces sidewall height further. Carefully check fender and liner clearance during full steering and suspension travel.
• Offset strategy - As wheel width increases, small offset adjustments can help center the tire in the wheel well. Use the calculator to balance inner clearance and outer poke relative to the OEM +50 mm reference. Avoid drastic offset changes that can affect handling and bearing loads.
• Winter or rough-road setup - Some owners downsize wheel diameter for more sidewall. Clearance around brakes and calipers is critical; verify by test fit and confirm with the calculator and OEM brake dimensions.

Because available factory sizes and brake packages can vary by trim, do not assume any particular plus or minus size will fit without confirmation. Verify using the calculator, physical test fitting, and OEM data.

Installation Tips

• Inspect and clean - Wire-brush the hub face and wheel mounting pad. Remove rust and debris. Do not apply lubricants to studs unless specified by OEM.
• Hub-centric rings - If using rings, ensure a snug fit on the 66.9 mm hub and the wheel’s center bore. Seat the ring fully before mounting the wheel.
• Test fit - Mount a bare wheel first to check caliper clearance and hub seating. Spin the wheel by hand and turn the steering lock-to-lock.
• Torque - Install lug nuts by hand, then torque in a star pattern to the specification in your owner’s manual. Re-torque after 50 to 100 miles.
• TPMS - Transfer existing sensors or install new compatible sensors. Perform the relearn procedure as described in the owner’s manual or with a TPMS tool.
• Final checks - With tires mounted, load the vehicle, drive slowly over bumps, and check for rubbing. Verify speedometer change with the calculator and GPS if you changed overall diameter.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench - For accurate lug nut torque.
• M12x1.5 lug nuts - Match seat type to your wheels.
• 66.9 mm hub-centric rings - 66.9 mm ID to your wheel bore OD.
• GM TPMS relearn tool - For sensor pairing after installation.

FAQs

• What is the bolt pattern for the 2019 Chevrolet Blazer?

  6x120.

• What is the center bore?

  66.9 mm. If your aftermarket wheel has a larger bore, use hub-centric rings sized 66.9 mm ID to the wheel’s bore OD.

• What is the OEM tire size?

  235/65R18 is known for at least one configuration. Other factory sizes may exist by trim. Always follow your door-jamb tire placard.

• What is the OEM offset?

  +50 mm for the listed 18x8 wheel. Use this as a reference when evaluating aftermarket options with the calculator.

• Will wheels from another 6x120 vehicle fit?

  Not automatically. You must also match or adapt center bore, confirm offset and backspacing, verify brake and spoke clearance, ensure correct fastener seat type and thread, and check load rating. Use the calculator and perform a physical test fit.

• What lug nut torque should I use?

  The torque specification can vary by wheel and trim. Do not guess. Use the value in your owner’s manual or OEM service information and re-torque after 50 to 100 miles.

• Can I run 19 or 20 inch wheels?

  Possibly, but it depends on tire choice, offset, and brake clearance. Use the calculator to keep overall diameter within about 1 to 3 percent of your OEM size, then physically test fit. Confirm any factory 19 or 20 inch packages for your VIN with an OEM source if applicable.

• Do I need hub-centric rings?

  Yes if your wheel’s center bore is larger than 66.9 mm. Rings improve centering and reduce vibration. Choose material and size that properly seats on the Blazer’s hub and in your wheel.

• Are spacers safe to use?

  Quality hub-centric spacers that match 6x120 and 66.9 mm can be safe when installed correctly, but they change effective offset. Use longer studs or correct hardware when required, torque to spec, and re-check frequently. Verify clearance with the calculator and a test fit.

• Will downsizing for winter fit over my brakes?

  Only if the smaller wheel clears calipers and rotors. There can be trim-specific brake packages. Measure and test fit, and confirm with OEM data before buying.