Triumph - Triumph TR3
The Triumph TR3 was introduced in 1955, as a replacement for the TR2. The TR3 still had the 1991cc overhead valve engine, which by now had now been tuned to give 100 bhp with the help of the larger SU H6 carburettors. For 1958 the Triumph TR3 had the bodywork altered with a new full width grille, along with various other small changes. Triumph still called this car the TR3, but many today know it as the TR3A, which was in production until 1961. The TR3 / TR3A production spans late 1955 to mid 1961 and one notable change was the introduction of disc brakes by Girling to the front wheels for the bulk of the production. With the introduction of the TR4, many of the dealers pleaded with the factory for the popular TR3 to continue in production while they gauged the response to the new TR4. Some refer to the cars from this era as the TR3B, of which there were some 3,300 built, the last two thousand or so being fitted with the larger capacity TR4 engine.
Tyre size for the Triumph TR3 was originally 5.50x15 tyre size. Blockley supply the equivalent size radial 155R15 tyre size, with a excellent speed rating and, but virtually all customers fit the very slightly larger 165VR15 tyre size, which was also the size which the TR3 was later fitted with at the factory. By 1961 the TR3 was fitted as standard with this 165R15 tyre size as standard, so this is the size we would suggest to use for a TR3. Blockley produce this correct period looking tread, steel belt construction, high speed rated 165VR15 tyre size - see full details of these TR3 tyre sizes below:
