Rolls Royce 25/30 Tyres

The Rolls Royce 25/30 mainly fitted 600x19 tyres, however 650x19 tyres are sometimes fitted dependant upon body style. We have found problems with 700x19 Firestone tyres not fitting due to clearance problems.

Please click on the tyre sizes to see details.

The Rolls-Royce 25/30 built between 1936 and 1938 is an updated version of the 20/25 with larger engine to provide more power, as often, over-large bodies had been fitted to earlier models leading to complaints about its performance.

The in-line 6 cylinder, overhead valve, engine is similar to that used in the 20/25 but increased in capacity to 4257 cc. A single stromberg downdraught carburettor replaced the Rolls-Royce item and magneto ignition was no longer fitted but a standby coil was provided. Synchromesh was fitted to third and top gears.

The chassis still had rigid front and rear axles suspended by half elliptic springs with hydraulic dampers. Braking is on all four wheels assisted by a mechanical servo. Separate rear brakes are fitted for the handbrake.

Only the chassis and mechanical parts were made by Rolls-Royce. The body was made and fitted by a coachbuilder selected by the owner.