Bentley Mulliner 9×20″ 5×112

For the Bentley Continental GT/GTC and Flying Spur (First and Second Generation), the 9×20″ Mulliner wheel with a 5×112 bolt pattern is one of the most iconic rim designs. This 7-spoke (often two-piece) wheel was a staple of the Mulliner Driving Specification.

1. Technical Specifications

These wheels were designed specifically for the weight and performance requirements of the W12 and V8 Bentley platforms.

• Size: 9J x 20″

• Bolt Pattern: 5 x 112 mm (Shared with many Audi/VW/Mercedes models, though the load rating is much higher for Bentley).

• Offset: Typically ET41.

• Center Bore: 57.1 mm.

• Construction: Often a two-piece split rim manufactured by BBS for Bentley. The center face is bolted to the outer barrel with titanium bolts.

2. Common Part Numbers & Finishes

The core part number for this wheel style is usually 3W0601025, with the suffix determining the specific finish:

• Painted Silver: 3W0601025AS

• Polished / Chrome: 3W0601025AM

• Dark Tint / Grey: 3W0601025BA

3. Known Maintenance Issues

• Corrosion on Split Rims: Because these are two-piece wheels, moisture can get trapped between the center face and the barrel. This often leads to white “spidering” corrosion under the lacquer, especially around the bolt holes.

• Buckling: Due to the low-profile tires (typically 275/35 R20) and the vehicle’s $5,500\text{ lb}$ weight, these rims are prone to slight bends if they hit deep potholes.

• Seized Bolts: If you are refurbishing these wheels, the titanium bolts can sometimes seize. Professional heat and specialized tools are required to remove them without snapping.