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).
List of ground clearance measurements for the 26-EX model when the axles are clamped to the buffers.
| Identifier | ExFiles\Box 4\1\ 01-page151 | |
| Date | 7th November 1934 guessed | |
| 26-EX Ground Clearances when both Axles are clamped on to the Buffers. Under Front Axle 8" . Jackall Jacks 4½" . D.W.S. Jacks 7" . Crankcase 6¼" . Front Stg. Arm s.s. tube 7¼" . Battery Box 3½" . Rear Silencer 4¾" . Front Silencer 5¼" . Rear Banjo Cross Member 3½" . Fish Tail 6" | ||