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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).
Rims and tyres, detailing correspondence with Dunlop and Michelin.

Identifier  ExFiles\Box 45\1\  Scan349
Date  6th November 1925
  
R.R. 493a (50 H) (D.D. 31. 12-6-25) J.H.D.
EXPERIMENTAL REPORT.
Expl. No.
REF Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG61125
To CJ. } FROM Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
To R.{Sir Henry Royce} }
Hs.{Lord Ernest Hives - Chair} absent.
RE. RIMS AND TYRES. X3809
With reference to CJ7/E5.11.25.
We wrote to Messrs. Dunlop to make certain of the point in question, and attach their reply.
Since then we have interrogated the Development Superintendent as to the sizes of the Michelin tyres which he mentions in this letter.
He has informed us, that while none of these sizes mentioned are high pressure tyres, which correspond to those manufactured by the Dunlop Co. for the well-base rim, he understands that Michelins are on the point of producing a tyre which we shall be able to use as replacements.
The car fitted with the new well-base rims and tyres is already in France. We are arranging that they shall revert to the standard wheels and tyres.
Hs{Lord Ernest Hives - Chair}/W.A.Robotham.
Handwritten notes: X4050
  
  


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