5×112 Toyota Supra Mk5 BMW Z4 G29 255 40 18 rims winter tires

winter setup on the Toyota Supra MK5 (A90/A91) or BMW Z4 (G29), moving to an 18-inch wheel is a smart choice. It provides more sidewall to handle potholes and ice, and the 5×112 bolt pattern makes many BMW-spec wheels compatible.

Wheel & Tire Specifications

To run a 255/40R18 setup, you generally have two options: a Square Setup (same size all around) or a Staggered Setup (wider in the rear).

1. The Square Setup (Recommended for Winter)

Running 255/40R18 on all four corners is the preferred winter configuration for these cars.

• Benefits: Allows for full tire rotation (extending life) and provides better “cutting” through deep snow than a wider rear tire.

• Rim Specs: 18x9J or 18×9.5J.

• Offset: +25mm to +32mm is ideal.

• Hub Bore: 66.6 mm (standard for G-chassis BMW/MK5 Supra).

2. The Staggered Setup (OEM Style)

If you prefer to keep the factory handling balance:

• Front: 18x9J (+32) with 255/40R18.

• Rear: 18x10J (+40) with 275/40R18.

• Note: Winter tires in 275-width can be harder to find and more expensive than the 255-width.

Top Winter Tire Recommendations (255/40R18)

Technical Fitment Checklist

• TPMS Sensors: Both cars use the same BMW-protocol TPMS (433MHz). If you buy a pre-mounted set, ensure they include these sensors, or you will have a persistent dash light.

• Brake Clearance: If you have the 3.0L Premium or A91 with the larger Brembo 4-piston front brakes, ensure the 18-inch wheel barrel has enough “drop center” clearance. Most flow-formed or forged 18s (like Apex SM-10 or Titan7) fit, but some cheap cast wheels may rub the caliper.

• Lug Bolts: Use M14 x 1.25 lug bolts. If you are using aftermarket wheels, check if they require Conical or Ball seat bolts (OEM is usually Conical).