Comparison of new 6.50x17 India tyres against standard 5.50x18 tyres on a Bentley at Donnington.
| Identifier | ExFiles\Box 157\6\ scan0160 | |
| Date | 26th August 1937 | |
| GBY- Out of D.R.M's findings at Donnington. [Strikethrough: we ought to be able to] Report on new 6.50x17 IndiaProduction 20 HP. with 4-speed box and Front Wheel Brakes Tyres. get a complete report for IndiaProduction 20 HP. with 4-speed box and Front Wheel Brakes's before they arrive These tyres have run on plain Rujo use on The Bentley, and were tried out yesterday on 3 B.H. A comparison was made against the standard IndiaProduction 20 HP. with 4-speed box and Front Wheel Brakes tyres 5.50 x 18 also in new condition. For noise in the new state as tested, there was very little difference between the two sets, the standard were however more inclined to groan at speeds below 15 mph. Tyre pressures as tested were 25 lbs front and 28 lbs rear on the 6.50 x 17 tyres and. 30 lbs all round on the 5.50 x 18 Tyres. The steering was slightly heavier with the larger tyres but not unpleasantly so. we were able to produce a low speed wobble with these tyres which could not be repeated with the | ||
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).