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Triumph TR3 Tire Pressures

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To find tires for your Triumph TR3 see our Triumph TR3 Tires page.

• Tire pressure for a Triumph TR3 ranges from 24-34 PSI depending on the year and specific model, the type of tires that you decide to fit, and pressure differences for front and rear tires.
• To find the ideal tire pressures for your car's year, model, and chosen tires follow the link to our Tire Pressure Guide.

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• The Triumph TR3 originally fitted 550x15 crossply tires. Today there is not a high-performance crossply in this size. We recommend fitting the 155 HR 15 PIRELLI CINTURATO CA67, which is currently in production.
• To find out more information on Triumph TR3 tires follow the link to our Triumph TR3 Tire Section.

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• Some Triumph TR3 were fitted with Route Borrani Wire Wheels, for more information follow the link to view our Borrani Wire Wheel Section.

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Triumph TR3 Tires

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The Triumph TR3 was initially equipped with a 550x15 Crossply tyre; the only crossply road tyre we have now is a 5.50 x 15 Excelsior, which isn't designed for use on classic sports cars. With no top-quality crossply available these days, we recommend the 155 HR 15 PIRELLI CINTURATO CA67, which will provide your TR3 the best overall handling.

Many TR3 owners prefer a bigger tyre, we suggest the 165 HR 15 PIRELLI CINTURATO CA67 for drivers who desire longer legs. Some owners desire to put a 195/65X15 or larger tyre footprint than this, however Longstone recommends against it. A tyre in this size is too modern for the TR3, which is designed with classic tyre technology in mind, a modern tire will numb the handling of the TR3 and reduce the quality of your driving experience.

The 165 SR 15 Michelin XZX is a late 1960s tyre , however it is not a sports car tyre and is better adapted to vehicles such as a VW Beetle. A sports car tire carcass, such as the ones found in the Cinturato CA67 or XAS, is highly recommended. TR3 white-wall tires are now available in a 165R15 Michelin XZX Whitewall size, although aesthetically we do not think that the TR3 looks its best with white wall tires, the whitewall tire is not suited to classic European sports cars such as the TR3.

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Triumph TR3 Wheels & Innertubes

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The TR3 was equipped with either standard tube-type wheels or spoked wire wheels, both of which require innertubes in order to properly function. The Michelin 15E innertube is the finest tube for a TR3 on these tires. Many TR3 models fit aftermarket wheels with the safety hump that makes a wheel tubeless. If you have aftermarket wire wheels however we would recommend fitting tubes.

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Triumph TR3 Borrani Wire Wheels

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Route Borrani wheels are available for your Triumph TR3. As representatives for the legendary Ruote Borrani Milano firm, we can offer all of their wheels. Ruote Borrani Milano wire wheels are without a doubt the best wire wheels available. Borrani wheels are hand-crafted with aluminium rims, steel spokes, and steel wheel centres. If your Borrani wheels need to be repaired, please email [email protected].

Borrani wheels are offered in the following styles:

• Painted silver finish, like those seen on vintage racing wheels.
• Highly polished rim, chrome spokes, and wheel centre, polished and chrome finish.
• With a painted finish with a polished outside edge.

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History of the triumph TR3

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The Triumph TR3 is a British sports car produced by the Standard-Triumph Motor Company between 1955 and 1962. The TR3 is a traditional roadster that evolved from the company's preceding TR2 model, with greater power and improved brakes. In 1957 and 1962, updated variants known informally but unofficially as the "TR3A" and "TR3B" went into production.

The TR3 was initially powered by a 1,991 cc straight-four OHV engine producing 95 horsepower at the start, a 5 hp increase over the TR2 thanks to larger SU-H6 carburettors. This was ultimately increased to 100 horsepower at 5000 rpm with the addition of a "high port" cylinder head and an extended manifold. The four-speed manual gearbox may be improved with an overdrive device on the top three gears that is electrically powered and controlled by a button on the dashboard. In 1956, the front brakes were upgraded from drums to discs, a first for a British production car.

Two A-arms, a manganese bronze trunnion, coil springs and tube shocks up front, an optional anti-roll bar, and worm and peg steering make up the suspension. The steering mechanism and linkage have substantial play and friction, which increases with wear in contrast to MGs of the same period.

The original "pre-facelift" TR3 was produced in 13,377 units, with 1,286 sold in the United Kingdom and the balance shipped mostly to the United States. There were about 826 licensed vehicles and 115 SORNED automobiles registered with the DVLA in the first quarter of 2011. The Motor magazine reviewed a hardtop car with overdrive. The Motor had a top speed of 105.3 mph and a 0-60 mph acceleration time of 10.8 seconds in 1956. The estimated fuel consumption is 27.1 miles per imperial gallon. The test car cost £1,103 (taxes included).

The Triumph won several races, rally events, and hill-climb championships across Europe and North America. With around 74,800 TR3s sold across all variants, the model was the third best-seller in the TR range, following only the TR7 (111,500 units) and TR6 (74,800 units) (94,500 units). The mechanically comparable, Michelotti-styled Triumph TR4 succeeded the TR3.