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).
To prevent confusion in the nomenclature of tyres for the 20 HP and 40/50 HP chassis.
| Identifier | ExFiles\Box 45\1\ Scan377 | |
| Date | 25th October 1926 | |
| X.4050 Hs{Lord Ernest Hives - Chair} Hs.{Lord Ernest Hives - Chair} Mx.{John H Maddocks - Chief Proving Officer} BY.{R.W. Bailey - Chief Engineer}/W. Wa.{Mr Wallis} EF. SH. D.P. BY14/H.{Arthur M. Hanbury - Head Complaints} OCT 25 1926 RECEIVED PHANTOM CHASSIS - TYRES. In order to prevent confusion which is likely to arise in the nomenclature of the tyres, after carefully considering the Dunlop Tyre List, it has been decided that the tyres to be fitted to well-base rims on the 20 HP. and 40/50 HP. chassis respectively are correctly described as follows:- a/- 20 HP. Chassis. 5¼ section (Traction tread). for 4½ x 21" well base rim. b/- 40/50 HP. Chassis. 6¼ section (Traction tread). for 5" x 21" well base rim. BY.{R.W. Bailey - Chief Engineer} [Signature] | ||