Bentley MkVI R Type Crown Wheel & Pinion Set RG6037A

Part number RG6037A is the genuine 12:41 crown wheel and pinion set for Bentley MkVI, early R Type, Rolls-Royce Silver Dawn, and Silver Wraith models. It provides a 3.416:1 axle ratio for the specified rear axle applications.

The 12:41 ratio provides an approximately 8% upgrade over the earlier standard 11:41 (3.72:1) unit. This later ratio was introduced midway through Bentley R Type production and became standard from chassis B1 YA, with use in Rolls-Royce Silver Dawn and later Silver Wraith SWB models.

With standard 6.50 x 16 tires, the 3.416:1 ratio provides approximately 50 mph at 2,000 rpm and 62 mph at 2,500 rpm. It is particularly suited to applications where the 13:40 (3.076:1) axle ratio may provide gearing that is too high.

The crown wheel and pinion are important differential components that determine the final drive ratio and influence the relationship between engine speed and road speed. Correct installation and setup are essential for proper differential operation.

Please verify the axle application and part number before ordering to ensure correct fitment. Professional installation using the appropriate specialist tools and procedures is recommended when servicing the differential and rear axle.