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).
Comparison table of suspension specifications for various car models.
| Identifier | ExFiles\Box 154a\2\ scan0372 | |
| Date | 4th March 1937 guessed | |
| SUSPENSION | | BENTLEY | 25/30 | WRAITH | PH. III | |---|---|---|---|---| | **SPRING INITIAL DEFLECTIONS** | | | | | | FRONT | 2.250" | 4.000" | 7.000" | 7.000" | | REAR | 4.000" | 6.400" | 6.400" | 7.000" | | **BUFFER CLEARANCES** | | | | | | FRONT | 1.600" | 2.250" | 2.225" | 2.187" | | REAR | 2.600" | 4.000" | 4.000" | 3.550" | | **SPRING LOAD NORMAL POSITION** | | | | | | FRONT | 750 LBS. | 850 LBS. | 1000 LBS. | 1250 LBS. | | REAR | 950 LBS. | 1150 LBS. | 1050 LBS. | 1400 LBS. | | **SPRING CENTRES** | | | | | | FRONT | 35" | 38" | 56" | 66" | | REAR | 50" | 56" | 56" | 66" | | **WEIGHT OF SPRINGS** | | | | | | FRONT | | | | | | REAR | | | | | | **COST OF SPRINGS** | | | | | | FRONT | | | | | | REAR | | | | | | **SPRING MANUFACTURERS** | | | | | | FRONT | | | | | | REAR | | | | | | **SPRING PIECE N°S** | | | | | | FRONT | F.B. 2804 | F.{Mr Friese} 58602 | G.W. 432/3 | G.83692/8 | | REAR | F.B. 2810 | F.{Mr Friese} 58608 | F.W. 754 | F.{Mr Friese} 88751 | | **SHOCK DAMPER INITIAL LOADS** | | | | | | FRONT | 60 LBS. | 40 LBS. | 40 LBS. | 60 LBS. | | REAR | 60 LBS. | 40 LBS. | 40 LBS. | 60 LBS. | | **DAMPER CONTROL BELLOWS SIZE** | | | | | | FRONT | N° 4 (1/2) | N° 4 (1/2) | N° 2 (1/4) | N° 2 (1/4) | | REAR | N° 6 (3/4) | N° 8 (FULL) | N° 8 (FULL) | N° 8 (FULL) | | ||