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).
The estimated and actual weights of various wheels and tyres.
| Identifier | ExFiles\Box 81\1\ scan0007 | |
| Date | 21th February 1922 | |
| (2) By.{R.W. Bailey - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} ROY.{Sir Henry Royce}2/AG.21.2.22. The estimated weight of a 32 x 4 1/2 Rudge Whitworth Wheel with Straight Sided Rim is 36.7 lbs. and 820 x 120 with Beaded Edged Rim 25.2 lbs. LATER. Tyre-Weights since to hand i.e. 820 x 120 Beaded Edged Cord Cover 25 lbs. 4 ozs. Tube ... ... 3. " 11 " 32 x 4 1/2 Straight Sided Cover 27 lbs. Tube ... Benson ... 3. " 11 ozs. Weights of Security Bolts for Cord Tyres not available. ROY.{Sir Henry Royce} Ry MADE AT CROXLEY | ||