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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).
Tyre size, pressure and damper recommendations for Chassis 29-EE.

Identifier  ExFiles\Box 29\1\  Scan264
Date  20th November 1926
  
To CWB. from Hs.{Lord Ernest Hives - Chair}

X457
Hsl/LG20.11.26.

CHASSIS 29-EE.
X457
X417

With reference to CWB1/GM19.11.26. There is no risk of high speed wobbles with the low pressure tyres on the 40/50 HP. car without front wheel brakes.

We recommend that 6.75" tyres should be used. We are not recommending the 6" tyres.

The front tyre pressures will have to be adjusted to 40xlbsxx prevent the steering being too heavy. 6.75" tyres with 40 lbs. pressure should be satisfactory.

There is no necessity to fit hydraulic dampers or extra friction in the pivots.

Hs.{Lord Ernest Hives - Chair}
  
  


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