Austin - Austin 12 and 12/4
The Austin 12 was first produced in 1921, a 4 cylinder 1661 cc side valve, built alongside the larger 20hp model, allowing Austin to have a range of cars to suit most markets. By 1927 the Austin 12 got given a longer stroke to increase the capacity to 1861 cc, the bore size remaining the same so as to remain in the 12hp tax bracket, and this stayed in production until 1931, to be transformed into the "Heavy 12" which was in production until 1935. In 1930 another 12hp Austin 6 cylinder 1496cc model was the new "Light 12", also referred to as the Austin Light Six, or even Austin 12/6 , which was built until 1936. And finally to confuse matters a little more, there was also the Austin 12/4 model, which was a 1535cc 4 cylinder engine that was put in the Light six chassis between 1932 and 1947.
Austin 12 tyre fitments for the various models were:
- The Austin 12hp 1861 cc cars built between 1927 and 1931 were fitted with 30x4.75 which is 4.75x20, and Blockley makes the best quality 475/500x20 tyre.
- The Austin 12 six cylinder "Light 12" 1496cc (built 1930 to 1936) were fitted with 4.75x19 tyre size, and Blockley makes this size (and 500x19 size which many people fit).
- Austin 12/4 1535 cc (produced 1932 to 1936) was originally fitted with 4.75x19 tyres, which Blockley produces. After this the next version of Austin 12 using this engine was built from 1938 to 1939, and reworked postwar to 1946.
- Austin 12hp "Heavy 12" 1861 cc (built 1932 to 1935) was fitted originally with 5.00x20. Blockley produce the perfect 500x20 tyres with correct period pattern and better quality than anything available. We have also supplied 21" tyres for some Austins, so if your car has 21" wheels we can help also.
-Austin 12 from 1938 onwards had a 5.75x16 for which we have a 550x16 tyre.