Rolls-Royce Archives
         « Prev  Box Series  Next »        

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 performance and durability for chassis 9-G-111.

Identifier  ExFiles\Box 4\9\  09-page112
Date  26th August 1925
  
S.R. 497a (20m) (S.R. 173 25-9-24) J.B.D.

EXPERIMENTAL REPORT
Expl. No.
COPY.
REF: Chateauroux.
26.8.25.

TYRES RECEIVED FOR CHASSIS 9-G-111.

Fitted to chassis in Derby . . . . . . . . . . . . 6
Received from Paris 13.6.25 . . . . . . . . . . . 8
" " " 17.6.25 . . . . . . . . . . . 6
" " " 25.6.25 . . . . . . . . . . . 6
" " " 1.7.25 . . . . . . . . . . . . 6
" " " 14.8.25 . . . . . . . . . . . 6

Tyres discarded during first 10,000 miles test.

No.1 after 3,840 miles - worn to canvas.
No.2 " 2,580 " - " " "
No.3 " 2,373 " - " " "
No.4 " 3,840 " - " " "
No.5 " 1,687 " - " " "
No.6 " 2,020 " - " " "
No.7 " 2,770 " - " " "
No.8 " 3,947 " - Burst - unfit for further use.
No.9 " 609 " - Burst - unfit for further use.
No.10 " 1,819 " - Worn to canvas.
No.12 " 1,165 " - Walls badly damaged.
No.13 " 1,105 " - Worn to canvas.
No.14 " 1,663 " - " " "
No.15 " 3,840 " - " " "
No.16 " 4,330 " - Burst - unfit for further use.
No.18 " 1,550 " - " " "
No.27 " 430 " - Cut through by horse-shoe.

Tyres still in running condition at end of first 10,000 miles test.

No.19 after 1,070 miles.
No.20 " 1,000 miles.
No.28 " 1,700 miles.

Tyres discarded during second 10,000 miles test. - starting on 6.8.25.

No.19 after 2,388 miles - worn to canvas.
No.20 " 2,623 " - " " "
No.23 " 877 " - Burst - useless.
No.24 " 1,558 " - Worn to canvas.
No.28 " 474 " - Burst & useless.

contd:-
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙