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).
Comparative table of wheel and tyre weights, and ground clearances for various car models.
| Identifier | ExFiles\Box 30\5\ Scan041 | |
| Date | 14th March 1935 | |
| Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}1/KW.14.3.35. Comparative Wheel & Tyre Weights & Ground Clearance. | | J-III Wraith 6.50 x 16 4.5 Rim. | Bentley 5.50 x 18 | Buick 6.25 x 16 | Graham 7 x 16 | Essex 6.25 x 16 | | :--- | :--- | :--- | :--- | :--- | :--- | | Wheel Weights | 23 lbs. 8 oz. | 21 lbs. 9 oz. | 21 lbs. 0 oz. | 24 lbs. 2 oz. | 20 lbs. 10 oz | | Tyre Weights | 24 " 12 " | 25 " 7 " | 22 " 4 " | 26 " 2 " | 19 " 14 " | | Tube Weights | 3 " 2 " | 3 " 10 " | 3 " 0 " | 3 " 2 " | 2 " 10 " | | TOTAL = | 51 " 6 " | 50 " 10 " | 46 " 4 " | 53 " 6 " | 43 " 2 " | No Body | | | | | | | | :--- | :--- | :--- | :--- | :--- | :--- | | Ground Clearance under front axle | 7.5" | 9.0" | 7.5" | 7.75" | 9.5" | | Ground Clearance under Rear Axle | 7.5" | 9.0" | 7.5" | 7.55" | 9.0" | The Buick Cover weight should be used as this cover is new. The Essex cover was partly worn. Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies} | ||