Triumph TR3

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Triumph TR3 Tyres

  • The Triumph TR3 originally fitted a 550x15 Crossply tyre, of which the best radial alternative these days is the 155 HR 15 PIRELLI CINTURATO CA67 which will give the nicest handling.
  • Many people like a larger tyre on their TR3, for which we recommend the 165 HR 15 PIRELLI CINTURATO ™ CA67 which will give more grip and longer legs.
  • The 165 SR 15 Michelin XZX is a more late ‘60s tyre and an absolute bargain at the moment, but not so much a sports car tyre and more suited to something like a VW Beetle.
  • TR3 White Wall Tyres are now also made as a 165R15 Michelin XZX Whitewall, however the TR3 is not suited to white walls.
  • The best inner tube for a TR3 on these tyres is the Michelin 15E inner tube.
  • Some owners want an even wider tyre footprint than this and fit a 195/65X15 or more, but Longstone Tyres would advise against this.
  • Tyre pressures for a TR3 we suggest 30 psi in the front and 34psi in the rear.

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  1. Jeu de 4 165SR15 Michelin XZX
    Set of 4 165 R15 Michelin XZX

    Starting at $636.72 $530.60

  2. Jeu de 5 165SR15 Michelin XZX
    Set of 5 165 R 15 Michelin XZX

    Starting at $789.60 $658.00

  3. 165 SR15 White Wall Michelin XZX
    Set of 4 165 SR15 White Wall Michelin XZX

    Starting at $888.72 $740.60

  4. White Wall 165SR15 Michelin XZX
    Set of 5 White Wall 165SR15 Michelin XZX

    Starting at $1,092.00 $910.00

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History of the Triumph TR3

The Triumph TR3 is a British sports automobile manufactured by the Standard-Triumph Motor Company from 1955 to 1962. The TR3 is a conventional roadster that is a development of the company's older TR2 model, with more power and better brakes. Updated models, known colloquially but unofficially as the "TR3A" and "TR3B" went into production in 1957 and 1962, respectively. The TR3 was superseded by the mechanically related, Michelotti-styled Triumph TR4.

With around 74,800 TR3s sold across all variations, the model was the third best-seller in the TR line, trailing only the TR7 (111,500 units) and TR6 (94,500 units). The Triumph competed in races, rally events, and hill-climb competitions in Europe and North America, capturing multiple victories.

The TR3 is propelled by the Standard wet liner inline-four engine, a 1,991 cc straight-four OHV engine producing 95 horsepower at the start, a 5 hp gain over the TR2 owing to bigger SU-H6 carburettors. With the installation of a "high port" cylinder head and an expanded manifold, this was eventually boosted to 100 horsepower at 5000 rpm. The four-speed manual transmission may be upgraded with an overdrive unit on the top three gears, which would be electrically driven and operated by a switch on the dashboard. The front brakes were converted from drums to discs in 1956, a first for a British series production car.

The suspension is composed of two A-arms, a manganese bronze trunnion, coil springs and tube shocks upfront, an optional anti-roll bar, and worm and peg steering. In comparison to MGs of the same era, the steering mechanism and linkage have significant play and friction, which increases with wear.

The original "pre-facelift" TR3 was built in 13,377 units, with 1,286 sold in the UK and the remainder exported mostly to the United States. As of the first quarter of 2011, there were roughly 826 licenced vehicles and 115 SORNED cars registered with the DVLA. The Motor publication evaluated a hardtop automobile with overdrive. In 1956, the Motor had a maximum speed of 105.3 mph and a 0–60 mph acceleration time of 10.8 seconds. Fuel usage was calculated to be 27.1 miles per imperial gallon. The test vehicle cost £1,103 incl. taxes.

Q: What tyres does a TR3 fit?

A: The original tyres on a TR3 were 5.50-15 crossply tyres. The radial alternative to a 5.50-15 crossply is a 155R15. Michelin still makes a 155R15 X and Pirelli still make a 155HR15 Cinturato CA67 that was an option at the time.

Q: Can you get white wall TR3 tyres?

A: Yes a TR3 can fit either 155R15 or 165R15 tyres and Michelin make a 165R15 XZX which is not really a sports car tyre but will work. However, putting whitewall tyres on a TR3 in the first place is a mistake not suited to Classic European sports cars.

Q: Does a TR3 need to fit inner tubes?

A: Yes. a TR3 fitted wire wheels. All wire wheels should fit innertubes.

Borrani Wire Wheels

Borrani wheels are available for your Triumph TR3. As agents for the iconic Ruote Borrani Milano company we are able to supply all wheels from their extensive range.

Wire wheels made by Ruote Borrani Milano are, without doubt, the best wire wheels available. Borrani wheels utilise aluminium rims, steel spokes and steel wheel centres.

If your Borrani wheels require rebuilding then please contact us at

Click the link for Triumph TR3 Borrani wheels.

Click the link for Triumph TR3 A Borrani wheels.

Wheels made by Borrani are available in the following styles:

  • Painted silver finish, as per the racing wheels of the period
  • Polished and chrome finish, highly polished rim, chrome spokes & wheel centre
  • Painted finish with polished outer edge

Aston Martin DB5 Borrani

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