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 safety of using smaller wheels and tyres on the 20 HP model due to ground clearance issues.
| Identifier | ExFiles\Box 45\2\ Scan025 | |
| Date | 21th April 1927 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} Handwritten: X4050 Hsl/LG21.4.27. 20 HP. WHEELS AND TYRES. Handwritten: X5820 With reference to your request that we should try and obtain wheels with smaller dia. rims for the 20 HP. Attached is a letter we have received from The Dunlop Co. Considering that we hit the ground with the petrol tank at Le CanadelHenry Royce's French residence with 21" rims 5¼" tyres, we consider it will not be safe for us to sacrifice any clearance. Hs.{Lord Ernest Hives - Chair} [Signature] | ||