2008 BMW M5 Wheel Interchange

2008 BMW M5 Wheel Fitment Guide

Known OEM Fitment For 2008 BMW M5

The values below are provided for the 2008 BMW M5. Some items may vary by factory package or region. If your car’s wheel or tire markings do not match these values, verify your exact spec using the calculator on this page, your owner’s manual, the OEM parts catalog, or the size cast into the back of your current wheels.

Notes:

• BMW often offered multiple factory wheel and tire packages on the M5. The rim size listed above and the tire size listed above may represent different OEM packages. Confirm your actual setup by reading your tire sidewalls and the wheel markings near the valve hole or on the back of a spoke.
• Backspacing depends on both wheel width and offset. If your wheel width differs from 8.0 inches, use the calculator to recompute backspacing and inner/outer positioning.

How To Use The Wheel Interchange Calculator

The calculator lets you compare a donor wheel and tire against your 2008 BMW M5 and also try custom wheel and tire sizes.

• Set Installed on (your vehicle) to 2008 BMW M5. This becomes your reference.
• Pick Wheels from (donor vehicle) to compare another vehicle’s wheels, or leave it blank if you are testing a custom setup.
• Use Custom wheel size to enter rim diameter, width, and offset you want to try. The position relative to the hub changes as width and offset change.
• Use Custom tire size to enter section width and aspect ratio. When you change rim diameter, the calculator updates overall tire diameter in the comparison so you can keep it close to stock.
• Aim to keep overall tire diameter within about 3 percent of your OEM setup to help maintain speedometer, ABS, and stability control behavior.
• Check inner clearance to suspension and brakes and outer clearance to fenders. If clearances are tight, try a slightly higher offset to move the wheel inward, or a slightly lower offset to move it outward, and adjust width sensibly.
• When values vary by trim or package, measure your current wheel: confirm width and offset stamped as ETxx on the back of the wheel, then input those as your baseline.

Fitment Checklist Before You Buy

• Bolt pattern must match 5x120.
• Center bore must seat hub-centrically at 72.6 mm. If your aftermarket wheel has a larger center bore, use hub-centric rings sized to 72.6 mm. If it is smaller, the wheel will not fit.
• Thread and seat type must match. The 2008 M5 uses M12 x 1.5 wheel bolts. Match the seat profile required by your wheel manufacturer and ensure proper bolt length if using spacers.
• Offset and width must clear brakes, suspension, and fenders. There is no single safe offset for every width. Use the calculator to compare against your current wheel, then test fit.
• Load rating and speed rating must meet or exceed OEM specifications for the vehicle’s weight and performance.
• TPMS compatibility may vary by market and wheel. Determine whether your car uses direct sensors in the wheel or an indirect system. Plan sensor transfer or new sensors as needed.
• Brake clearance. The M5 has large brakes. Verify spoke and barrel clearance by test fitting or checking a template from the wheel maker.
• Overall tire diameter. Keep within about 3 percent of your verified OEM tire diameter for best results. Use the calculator to confirm.
• Winter fitment. Narrower tires can improve winter traction but must still meet load rating and clear all components.

Plus Sizing And Common Upgrades

Plus sizing increases rim diameter while adjusting tire aspect ratio so overall diameter stays similar. This preserves gearing and helps avoid electronic and clearance issues.

• Identify your actual OEM baseline by reading the size on your current tires and the ET stamping on your wheels.
• Enter that baseline in the calculator. Then try a larger rim diameter in Custom wheel size and reduce tire aspect ratio in Custom tire size until overall diameter is within about 3 percent.
• Balance width and offset. A wider wheel pushes inner and outer edges outward by half the width change. Use offset to fine tune position.
• If you experience rubbing inboard, increase offset or reduce width. If you rub the fender, decrease offset or reduce width.

Because factory packages can differ, do not assume a specific upgrade size without confirming with the calculator and OEM sources for your exact vehicle configuration.

Installation Tips

• Test fit first. Install one front and one rear wheel without tires to confirm brake and hub clearance if possible.
• Clean the hub face and the wheel mounting pad. Remove rust and debris so the wheel seats flush. A light, non-conductive anti-seize can be applied to the hub pilot only. Keep threads clean and dry unless the manufacturer specifies otherwise.
• If using spacers, use high-quality hub-centric spacers matched to 72.6 mm and ensure appropriate longer wheel bolts for safe thread engagement at least equal to the bolt diameter.
• Hand start all bolts, then snug in a star pattern. Lower the vehicle and torque the wheel bolts to the BMW-specified value from your owner’s manual.
• Re-torque after 50 to 100 miles, especially with new wheels or spacers.
• Reset or relearn TPMS if equipped according to your vehicle instructions.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench
• M12 x 1.5 wheel bolts for BMW applications
• 72.6 mm hub-centric rings
• TPMS programming or relearn tool

FAQs

• What is the bolt pattern on the 2008 BMW M5?

  The bolt pattern is 5x120.

• Do I need hub-centric rings for aftermarket wheels?

  Your car’s hub is 72.6 mm. If the aftermarket wheel’s center bore is larger than 72.6 mm, use rings sized to 72.6 mm for a vibration-free fit. If the wheel’s bore is smaller, it will not fit.

• Can I run 18 inch or 19 inch wheels?

  Both sizes have been used on this model in different packages. The provided data includes an 18 inch rim example and a 19 inch tire example. Check the size printed on your current tires and the ET stamp on your wheels, then use the calculator to compare any new size to your actual OEM setup.

• What offset should I choose?

  Offset depends on wheel width and brake clearance. One sample OEM value here is ET 14, but that may not apply to all wheel widths or packages. Use the calculator to model your exact width and offset, then test fit before mounting tires.

• What is the correct wheel bolt torque?

  Refer to your owner’s manual or BMW service information for the exact torque for your market. Do not guess. Torque with a quality wrench and recheck after 50 to 100 miles.

• Will I need spacers?

  Only if you need more clearance for brakes or suspension, or to correct wheel position. If you use spacers, choose hub-centric units matched to 72.6 mm and install appropriately longer bolts to maintain safe thread engagement.

• How do I prevent rubbing with wider tires?

  Keep overall diameter close to OEM, adjust offset to center the tire in the wheel well, and verify inner and outer clearances with the calculator. Test fit and check lock-to-lock steering and full suspension compression.

• How do I confirm my current wheel specs?

  Read the tire size on the sidewall. Look for width and offset cast into the wheel, often behind a spoke, shown as widthJxdiameter and ETxx. Cross-check with your owner’s manual or BMW parts catalog, then input those as your baseline in the calculator.