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).
Spare wheel weight distribution, spring strengthening for export models, and a table of spare wheel weights.
| Identifier | WestWitteringFiles\O\2January1926-March1926\ Scan17 | |
| Date | 10th March 1926 guessed | |
| -2- a spare wheel is assumed to have its weight distributed 65% front and 33% rear. On the 20 HP. however, its weight is assumed to be 100% on the front when carried on the step. ABROAD. The 40/50 HP. front springs are strengthened above standard for Spain and Australia - the 20 HP. left unaltered because 20 HP. has 25% stiffer springs, 40/50 HP. only 20% for these countries. SPARE WHEEL WEIGHTS. 40/50 - Actual spare wheel weight ---- 86 lbs. Allowance for spare wheel ---- 75 lbs. 20 HP. - Actual spare wheel weight ---- 69 lbs. Allowance if carried on rear ---- 100 lbs. Allowance if carried on step ---- 70 lbs. --------------------- Hs{Lord Ernest Hives - Chair}/W.A. Robotham. | ||