From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Chart of Bentley & Rationalised Axle Ratios, listing corresponding Pinion and Wheel part numbers.
| Identifier | ExFiles\Box 114\1\ scan0316 | |
| Date | 30th May 1940 guessed | |
| BENTLEY & RATIONALISED AXLE RATIOS. RATIO | PINION | WHEEL 10/41. | GB.609 | GB.186 10/41. | GB.2166 | GB.186 10/41. | GB.2078 | GB.186 10/41. | GB.2351 | GB.186 10/41. | GB.3430 | GB.186 10/41. | GB.4297 | GB.186 10/41. | GB.4901 | GB.4902 10/41. | GB.5014 | GB.5015 10/43. | GB.1501 | GB.1502 10/43. | GB.2148 | GB.1502 10/43. | GB.2352 | GB.1502 10/43. | GB.3439 | GB.1502 10/43. | GB.3559 | GB.1502 10/43. | GB.3267 | GB.1502 10/43. | GB.4302 | GB.4925 10/43. | GB.4646 | GB.4647 10/43. | GB.3439 | GB.4925 10/43. | RG{Mr Rowledge} 700 | GB.4647 13/43. | GB.5354 | GB.5355 RATIO | PINION | WHEEL 11/43. | GB.798 | GB.405 11/43. | GB.2167 | GB.405 11/43. | GB.2163 | GB.405 11/43. | GB.2353 | GB.405 11/43. | GB.4592 | GB.4593 12/41 | GB.2227 | GB.2226 12/41 | GB.4994 | GB.4995 12/41 | GB.4767 | GB.2226 11/41 | GB.5340 | GB.5339 11/41 | GB.4591 | GB.4510 11/41 | GB.4958 | GB.4957 8/37 | GB.3378 | GB.3377 9/37 | GB.3487 | GB.3488 12/43. | RG{Mr Rowledge} 130 | RG{Mr Rowledge} 131. | ||