Comparison of Dunlop and India tyres for 40/50 & 20 HP cars, focusing on tread, non-skid properties, and comfort.
| Identifier | ExFiles\Box 58\1\ Scan108 | |
| Date | 5th February 1931 | |
| W/S. {Derby Works / Sales} To C. From Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} c. to Sg. {Arthur F. Sidgreaves - MD} Wor. {Arthur Wormald - General Works Manager} TYRES 40/50 & 20 HP. CARS. Dunlops recently supplied us with two tyres from their Canadian factory with a view to showing us a tread pattern which had the appearance of being a better non-skid and improved silent tread. We have tried these tyres and they are certainly reasonably silent. We are sending one down to you for examination to see if you like its appearance. Actually we do not suppose their non-skid properties are any better than the improved silent tread. We have recently completed a 10,000 miles test on the latest India(Production 20 HP. with 4-speed box and Front Wheel Brakes) tyres. We are satisfied that these tyres wear as well as the Dunlops, they are not very noisy and when run at a slightly lower pressure give equal riding comfort. They were run at this reduced pressure in France and their life was satisfactory. We are shortly circulating a standardisation sheet for these tyres and suggest that you get a set from Capt. Bowman from the Car Mart and try them on one of your demonstration cars. Our tests so far indicate that they are not appreciably inferior to the improved silent tread Dunlop for skidding, and you may think their appearance is preferable. Naturally the question of fitting India(Production 20 HP. with 4-speed box and Front Wheel Brakes) Tyres as an alternative standard involves a certain amount of policy, we have only been concerned with their efficiency. The India(Production 20 HP. with 4-speed box and Front Wheel Brakes) tyre we believe to be an entirely British product. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).