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 specifications for detachable wire and artillery wheels for the 20 HP Chassis.
| Identifier | ExFiles\Box 159\1\ scan0152 | |
| Date | 30th March 1927 | |
| -2- Wd{Mr Wood/Mr Whitehead}3/NJ30.3.27. 20 HP.Chassis. E.2 Detachable wire wheel with rim for 820 x 120 mm. B/E.{Mr Elliott - Chief Engineer} or 32" x 4½" S/S tyres for 20 HP.chassis; corresponding hubs Front F.51304/5 Rear G.50783/4. These wheels were fitted to the 30th chassis of Series F.{Mr Friese} G.2 Detachable wire wheel with rim for 32" x 4½" S/S tyre for 20 HP.chassis; corresponding hubs Front G.51724/5 Rear G.51839/40. These wheels were fitted after 30th chassis of Series F.{Mr Friese} GWB.2 Detachable wire wheel with wellbase rim 4½" x 21" for 5.25" section tyre for 20 HP.chassis; corresponding hubs Front G.51724/5 Rear G.51839/40. J.2 Detachable artillery type steel wheel, 10 spokes, with rim for 820 x 120 mm. B/E or 32" x 4½" S/S tyres for 20 HP.chassis; corresponding hubs Front F.51304/5 Rear G.50783/4. H.2 Detachable artillery type steel wheel, 12 spokes, with rim for 32" x 4½" S/S tyre for 20 HP.chassis; corresponding hubs Front G.51824/5 Rear G.51835/6. HWB.2 Detachable artillery type steel wheel, 12 spokes, with wellbase rim 4½" x 21" for 5.25" section tyre for 20 HP.chassis; corresponding hubs Front G.51824/5 Rear G.51835/6. Wd.{Mr Wood/Mr Whitehead} | ||