2016 Audi S4 Wheel Interchange

2016 Audi S4 Wheel Fitment Guide

Known OEM Fitment For 2016 Audi S4

The values below reflect known factory specifications for the 2016 Audi S4. Some items can vary by trim or option package. If your car differs, confirm using the on-page calculator and your owner’s manual or dealer parts database by VIN.

Tip: The tire’s overall diameter with 245/40R18 is approximately 25.7 in. Use this as a reference target when sizing alternatives, and verify with the calculator.

How To Use The Wheel Interchange Calculator

The calculator lets you compare a donor wheel setup to your 2016 Audi S4 and try custom wheel and tire sizes. It is designed to help you visualize position changes and tire diameter differences before you buy.

• Set Installed on to 2016 Audi S4 and confirm the OEM baseline shown above.
• In Wheels from, choose a donor vehicle or enter the donor wheel’s specs if you have them.
• Use Custom wheel size to try different rim diameters, widths, and offsets. As you change rim diameter, the tool updates tire diameter in the comparison when you also adjust Custom tire size.
• Match Custom tire size so overall diameter stays close to your OEM reference if you want to keep speedometer and gearing behavior similar.
• Interpret changes in width and offset as position changes:
  • More positive offset pulls the wheel inward. Less positive offset pushes it outward.
  • Wider wheels extend inward and outward from the mounting face by half the width change on each side.
• Measure your car for clearance. Use a straightedge on the fender and a ruler at the closest inner points like strut, spring perch, and brake caliper to verify that the new inner and outer positions indicated by the calculator will clear.

Always verify brake caliper and spoke clearance with a physical test fit before mounting tires.

Fitment Checklist Before You Buy

• Bolt pattern: Wheel must be 5x112. Do not attempt to fit mismatched PCD.
• Center bore: Vehicle hub is 66.6 mm. Choose hubcentric wheels with 66.6 mm bore or use quality hub-centric rings if the wheel bore is larger. Do not use a wheel with a smaller bore.
• Thread and seat: Hardware is M14 x 1.5. Confirm the correct seat type for your wheels. Audi OEM bolts are typically ball seat while many aftermarket wheels use cone seat. Never mix seat types.
• Offset and width: Use the calculator to compare inner clearance to suspension and brakes and outer position relative to the fender. Plan a safe margin and test fit.
• Brake clearance: Spoke profile and barrel shape matter. Confirm caliper clearance front and rear with the exact wheel.
• Load rating: Wheel and tire load ratings must meet or exceed OEM requirements for the S4.
• Tire diameter: Keep overall diameter close to your OEM 245/40R18 reference to minimize speedometer error. Many owners aim for less than about 2 percent change. Verify with the calculator and your tire manufacturer’s specs.
• TPMS: Some trims or regions may use direct sensors while others use indirect systems. Check your owner’s manual and plan for sensors or relearn procedures as applicable.
• Spacers: Only if needed for clearance. Use hubcentric spacers sized to 66.6 mm with properly extended M14 x 1.5 hardware. Recheck torque after installation.

Plus Sizing And Common Upgrades

Many 2016 Audi S4 owners explore larger wheel diameters and wider tires for appearance and handling. Keep these principles in mind:

• Plus sizing to a larger rim often requires a lower-profile tire to maintain near-stock overall diameter. Use the calculator to balance rim diameter with tire aspect ratio.
• Wider wheels and tires can improve grip but may reduce inner clearance to the suspension and outer clearance to fenders. Check both ends of travel and steering lock.
• Ride and durability: Larger diameters with shorter sidewalls can increase ride harshness and curb or pothole risk.
• Winter setups: Narrower tires can help in snow, but verify minimum wheel diameter clears the S4’s brakes. Do not assume a smaller-than-18 inch rim will clear.
• AWD considerations: Keep rolling circumference equal on all four corners. Avoid staggered tire diameters. If using a staggered wheel width, ensure tire outer diameter matches front to rear.

Installation Tips

• Work on a level surface and support the car securely with stands at approved lift points. Refer to the owner’s manual for lift locations.
• Clean the hub face and wheel mounting pad. Remove corrosion so the wheel seats flush.
• Dry fit one front and one rear wheel to confirm brake and suspension clearance before mounting tires.
• Use a wheel hanger guide pin sized for M14 x 1.5 to prevent cross-threading and protect the hub.
• Start all bolts by hand, then snug in a star pattern. Final torque to the OEM specification from your owner’s manual using a calibrated torque wrench. Re-torque after 50 to 100 miles.
• If using spacers, confirm hubcentric fit, proper bolt seat type, and sufficient thread engagement per the spacer manufacturer.
• Initialize or relearn TPMS per the owner’s manual after wheel or tire changes.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench
• 17 mm thin-wall socket for alloy wheels
• Wheel hanger guide pin M14 x 1.5
• 66.6 mm hub-centric rings

FAQs

• What does 5x112 mean on my Audi S4?

  It is the bolt pattern. Your hub has 5 mounting holes arranged on a 112 mm circle. Wheels must match this exactly.

• Can I use wheels with a 5x114.3 pattern using wobble bolts?

  This is not recommended. A mismatched PCD can prevent proper seating and compromise safety. Use only 5x112 wheels.

• Do I need hub-centric rings?

  If your aftermarket wheel’s center bore is larger than 66.6 mm, use rings that size the wheel down to 66.6 mm for a hubcentric fit. Rings are not used if the wheel bore is already 66.6 mm. Never attempt to fit a wheel with a smaller bore than 66.6 mm.

• What offset will work on my S4?

  Offset needs depend on wheel width, brake clearance, and fender space. Start from the OEM ET 47 on an 18x8.0 wheel, then use the calculator to see how changes move the wheel in or out. Measure your car and test fit to confirm clearance before driving.

• Will 17 inch wheels fit over my brakes?

  Brake package and spoke design determine minimum diameter. This can vary by trim and wheel model. Verify with a physical test fit or an OEM parts source before purchasing smaller-diameter wheels.

• What tire size keeps my speedometer closest to stock?

  Use the calculator to match overall diameter to your OEM 245/40R18 reference. Many users target less than about 2 percent difference, but always confirm using tire manufacturer specs and the calculator readout.

• Is a staggered setup OK on the S4’s AWD system?

  Keep rolling circumference equal front to rear to protect the AWD system and maintain handling balance. If you choose staggered wheel widths, ensure tire outer diameter remains the same at both axles.

• Do I need new wheel bolts?

  You may if your new wheels use a different seat type or if you install spacers that require longer bolts. Hardware must be M14 x 1.5 with the correct seat for the wheel.