2011 Cadillac CTS Wheel Interchange

2011 Cadillac CTS Wheel Fitment Guide | wheelinterchange.com

Known OEM Fitment For 2011 Cadillac CTS

The values below are the OEM specifications we have on file. Some trims and option packages may differ. If a value is missing for your exact build or appears to conflict, verify on your door jamb tire label, in the owner’s manual, and by using the on-page calculator to compare sizes.

Why the wheel and tire sizes both appear: the CTS was offered with different OEM wheel and tire packages. The tire listed above is a known OEM 17 inch package, while the wheel dimensions listed are a known 18 inch package. Confirm your exact setup using your door label and the calculator before ordering.

How To Use The Wheel Interchange Calculator

The calculator on this page lets you compare a potential donor wheel and tire to your 2011 Cadillac CTS. It also supports custom wheel and tire sizes.

• Set Installed on (your vehicle) to 2011 Cadillac CTS. The known specs above will prefill where available.
• For Wheels from (donor vehicle), enter the donor car info or type in Custom wheel size to specify rim diameter, rim width, and offset.
• Adjust Custom tire size if you plan to change section width or aspect ratio. When you change rim diameter, the calculator updates the overall tire diameter in the comparison so you can keep rolling diameter in check.
• Review inner clearance to the strut and brake, outer poke relative to the fender, and overall tire diameter difference. Aim to keep overall diameter change minimal to protect ABS, speedometer accuracy, and driveline.
• If the donor wheel’s center bore is larger than 67.0 mm, plan to use hub-centric rings sized to 67.0 mm on the inner step. If the donor bore is smaller, the wheel will not seat without machining.
• Use the comparison to decide if a spacer is needed. If so, confirm thread engagement and fender coverage are still safe and legal in your area.

Fitment Checklist Before You Buy

• Bolt pattern: 5x120 must match exactly.
• Center bore: vehicle hub is 67.0 mm. Larger wheel bores require hub-centric rings. Smaller bores do not fit.
• Thread size: M14 x 1.5. Use hardware that matches both your hub threads and the wheel’s seat type. Do not mix conical, ball, or mag seats.
• Offset and width: compare with the calculator to confirm inner clearance to struts, spring perches, and brake calipers, and outer clearance to the fender and liners.
• Overall tire diameter: keep changes small using the calculator. Large changes can affect ABS, traction control, and gearing.
• Brake clearance: visually confirm spoke and barrel clearance over your calipers. Some brake packages need more barrel drop or spoke clearance.
• Load rating: wheel and tire load ratings should meet or exceed the CTS’s axle and GVWR requirements.
• TPMS: plan to transfer or program TPMS sensors compatible with your 2011 CTS.
• Spacers or rings: use quality hub-centric spacers only if necessary. Confirm sufficient stud engagement or use extended hardware where appropriate.
• Local laws and inspection: ensure poke and tire coverage comply with your regulations.

Plus Sizing And Common Upgrades

Plus sizing changes wheel diameter and width while keeping overall tire diameter close to stock. The on-page calculator shows diameter change as you adjust sizes.

• Start from your actual OEM package. If your door label shows 235/55R17, enter that in Installed on. If you have the 18x8 ET48 wheel, enter the matching OEM tire size for that package if known, or use the calculator to find a tire that keeps overall diameter close.
• When increasing rim diameter, reduce tire aspect ratio so overall diameter stays within a small variance. The calculator updates the result immediately.
• Watch offset relative to width. Small offset changes alter inner and outer clearance. Use the calculator’s inner and outer position readouts to avoid strut or fender contact.
• If using an aftermarket wheel with a larger center bore, plan for hub-centric rings to 67.0 mm to reduce vibration.

If you do not see your exact OEM tire for the 18 inch package in the table above, that is because available packages varied by trim. Use the calculator with your known OEM starting size from the door label or owner’s manual and compare to your desired upgrade.

Installation Tips

• Work on a cool vehicle, chock wheels, and support the car with rated jack stands on solid ground.
• Clean the hub face and wheel mounting pad so the wheel seats flat. Remove rust and debris with a wire brush.
• Dry-fit one front and one rear before mounting tires to verify caliper and fender clearance.
• Do not lubricate wheel studs or lug bolt threads unless specified by the vehicle manufacturer, as it changes torque.
• Tighten lugs in a star pattern in stages using a torque wrench. Use the torque spec from the 2011 Cadillac CTS owner’s manual or an OEM service source.
• Re-torque after 50 to 100 miles of driving and after any heat cycles, especially with new wheels or spacers.
• If using hub-centric rings, install them fully seated on the wheel before mounting.
• If spacers are required, use hub-centric designs that maintain a 67.0 mm hub interface and ensure adequate thread engagement or appropriate extended hardware.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench
• Thin wall lug nut socket set
• Floor jack and jack stands
• M14x1.5 lug nuts or bolts that match your wheel seat type

FAQs

• What is the bolt pattern on the 2011 Cadillac CTS?

  5x120. The wheel must have 5 studs on a 120 mm bolt circle.

• My wheel’s center bore is larger than 67.0 mm. Can I use it?

  Yes, with hub-centric rings that reduce the wheel bore to 67.0 mm. If the bore is smaller than 67.0 mm, the wheel will not fit without machining.

• Why does the OEM tire size show 235/55R17 but the OEM wheel shows 18x8 ET48?

  The CTS was sold with multiple OEM packages. The 235/55R17 tire size is from a 17 inch package, and 18x8 ET48 is a separate 18 inch package. Check your door label and use the calculator to match your car’s starting size.

• What lug hardware does the 2011 CTS use?

  The thread is M14 x 1.5. The seat type depends on the wheel. Match the lug seat to the wheel design and follow the torque spec in the owner’s manual or OEM service documentation.

• Will wheels from another make with 5x120 fit my CTS?

  Possibly, but you must verify center bore, offset, width, brake clearance, and load rating. Use the calculator to compare inner and outer positions and confirm the donor wheel can be made hub-centric to 67.0 mm.

• Can I use spacers to correct offset?

  Yes, if needed and selected carefully. Use quality hub-centric spacers, maintain proper thread engagement or use extended hardware, and recheck fender coverage and brake clearance.

• What is a safe overall diameter change when plus sizing?

  Keep changes small to protect ABS and speedometer accuracy. Use the calculator to minimize difference and verify clearance throughout suspension travel and steering lock.

• Do I need new TPMS sensors?

  You can transfer your existing sensors if compatible with the new wheels, or use compatible replacements. Follow the CTS relearn or programming process after installation.