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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 pressures for the Bentley V.

Identifier  ExFiles\Box 146\5\  scan0292
Date  13th March 1940
  
W/P.
To Sr. from Rm.{William Robotham - Chief Engineer}

1245

Rm.{William Robotham - Chief Engineer}4/MH.{M. Huckerby}13.3.40.

With reference to your query re tyre pressures on the Bentley V.{VIENNA}

The standard pressures for English conditions are 25 lbs. per sq.in. on the front and 28 lbs. per sq.inch on the rear.

For continuous high speed driving on the Continent you may find it necessary to raise these pressures by about 2 lbs. per sq.inch to improve the life of the tyre.

Rm.{William Robotham - Chief Engineer}
  
  


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