2009 Cadillac SRX Wheel Interchange

2009 Cadillac SRX Wheel Fitment Guide - wheelinterchange.com

Known OEM Fitment For 2009 Cadillac SRX

The values below are taken from available OEM data for the 2009 SRX. Some trims and appearance packages used different wheel and tire sizes. If a spec is not listed for your exact trim, confirm it on your driver door placard, in the owner’s manual, or by using the calculator on this page to compare your current setup to any donor wheels.

Note: The 20 x 8.0 wheel specification and the 235/65R17 tire indicate that multiple OEM packages were offered. This is normal for SRX. Always verify what your vehicle currently has before purchasing wheels or tires.

How To Use The Wheel Interchange Calculator

• Set “Installed on (your vehicle)” to 2009 Cadillac SRX.
• Enter your current wheel and tire size if it differs from the defaults. If your door placard shows a different size, use that for the baseline.
• Under “Wheels from (donor vehicle),” enter the donor wheel specs or a custom wheel size. You can adjust rim diameter, rim width, and offset.
• Use “Custom tire size” to select a tire section width and aspect ratio. The calculator updates overall tire diameter automatically when you change rim diameter.
• Review the comparison outputs: poke/inner clearance change, strut and fender clearance, speedometer variance, and ride height difference.
• Aim to keep overall tire diameter within about 3 percent of your baseline and offset changes modest so inner and outer clearances remain safe.

Fitment Checklist Before You Buy

• Bolt pattern - Wheel must be 6x115. Do not attempt to use 6x114.3 or 5-lug patterns.
• Center bore - OEM hub is 70.1 mm. If the new wheel’s bore is larger, use quality hub-centric rings sized to 70.1 mm. If the bore is smaller, the wheel will not fit.
• Offset and backspacing - Start from the known OEM ET 50 mm for the 20 x 8.0 and compare changes with the calculator. Large offset deviations can cause rubbing or bearing and steering feel issues.
• Brake clearance - Spoke design and barrel shape matter. Test fit or verify with a template from the wheel maker to ensure caliper clearance.
• Suspension and fender clearance - Check inner clearance to struts and outer poke vs fender liners through full steering lock and compression.
• Tire overall diameter - Use the calculator to keep overall diameter close to your current size to protect ABS, AWD, gearing, and speedometer accuracy.
• Load rating - Wheels and tires must meet or exceed the SRX’s axle load. Check the tire load index and wheel load rating.
• TPMS - Plan to transfer or program compatible TPMS sensors. Use new service kits when possible.
• Lug hardware - Thread size is M12 x 1.5. Confirm lug nut seat type matches the wheel design. Do not mix seat styles.
• Torque - Tighten lugs in a star pattern with a calibrated torque wrench to the value in the SRX owner’s manual or service information. Do not guess.

Plus Sizing And Common Upgrades

Many 2009 SRX owners consider moving between 17, 18, 19, and 20 inch wheels. Because multiple OEM packages existed, use your current tire as the baseline and keep the overall rolling diameter close. For example, if your baseline is 235/65R17, the overall diameter is about 29.0 inches. When moving to a larger rim diameter, choose a tire profile that holds the total diameter within roughly 3 percent. Keep offset changes small and verify brake and fender clearances using the calculator before buying.

• Maintain hub-centric fit at 70.1 mm, or use proper rings if the wheel bore is larger.
• Try to keep offset close to OEM to avoid rubbing and handling changes. Small changes can be acceptable if clearances check out.
• 6x115 is a specific bolt pattern. Only wheels with 6x115 will bolt up correctly.

Installation Tips

• Test fit each front and rear position before mounting tires when possible to confirm caliper and strut clearance.
• Clean hub faces and wheel mounting pads to bare metal. Rust or debris can cause runout or loose wheels.
• If using hub-centric rings, seat them fully on the wheel and ensure a snug hub fit.
• Hand start all lug nuts to avoid cross-threading. Use only light tool assist for rundown and finish with a torque wrench.
• Tighten lugs in a crisscross star pattern in stages. Re-torque after 50 to 100 miles.
• Transfer or program TPMS sensors and install new TPMS service kits as needed. Verify no leaks after mounting.
• Check full steering lock-to-lock and drive over bumps at low speed to confirm no rubbing under load.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench - Search on Amazon
• M12 x 1.5 lug nuts or bolts that match your wheel seat type - Search on Amazon
• Hub-centric rings for 70.1 mm hubs if your wheel bore is larger - Search on Amazon
• M12 x 1.5 thread chaser or tap to clean wheel stud threads - Search on Amazon

FAQs

• What is the bolt pattern for the 2009 Cadillac SRX?

  6x115. Wheels must have 6 lugs and a 115 mm pitch circle diameter.

• What is the center bore size?

  70.1 mm. If a wheel’s bore is larger, use hub-centric rings to 70.1 mm. If smaller, the wheel will not fit.

• Can I use a 6x114.3 wheel on a 6x115 hub?

  No. The patterns are different. For safety and proper centering you must use 6x115.

• What is the OEM offset?

  A known OEM configuration is 20 x 8.0 with ET 50 mm. Other trims may differ. Use the calculator to compare your current wheels to any new setup and verify clearances.

• What is the OEM thread size for lug nuts?

  M12 x 1.5. Confirm the lug seat type required by your wheels before purchasing hardware.

• Will 20 inch wheels fit my 2009 SRX?

  20 x 8.0 ET 50 mm appears as an OEM size. If upgrading from another size, match bolt pattern and center bore, keep overall tire diameter close, and verify brake and fender clearance with the calculator.

• What tire diameter should I target when changing wheel size?

  Use your current tire as the baseline. For example, 235/65R17 is approximately 29.0 inches in overall diameter. Keep new setups within about 3 percent and confirm speedometer variance in the calculator.

• What torque should I use on the lug nuts?

  Refer to the 2009 SRX owner’s manual or GM service information for the exact torque. Tighten with a calibrated torque wrench in a star pattern.

• Do I need new TPMS sensors?

  You can typically transfer your existing sensors if compatible with the new wheels. Replace seals and service kits and perform relearn procedures as required.