All Triumph Models 1957 Motorcycles
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Triumph Speed Twin 5 T

1957

Year1957
MakeTriumph
Displacement498.0 ccm (30.39 cubic inches)
Triumph Speed Twin 5 T
Triumph Speed Twin 5 T - Main Image
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Review

The 1957 Triumph Speed Twin 5T represents a significant chapter in British motorcycling history, a year when the Speed Twin continued its reign as a popular and accessible twin-cylinder machine. By '57, the Speed Twin had undergone numerous refinements since its 1938 inception, solidifying its place in the market. It was a direct competitor to other popular British parallel twins of the era, such as the BSA A7 and the Norton Dominator 88, offering a compelling package of reliability and approachable power for the everyday rider.

At the heart of the 1957 Speed Twin 5T was its robust 498.0 ccm (30.39 cubic inches) twin, four-stroke engine. This powerplant was engineered for dependable output, producing 27.0 HP (19.7 kW) at a respectable 6300 RPM. While not a fire-breathing sportbike, these specifications ensured lively acceleration for its time and capable cruising speeds. The twin-cylinder configuration provided a smoother power delivery compared to many singles, contributing to a more refined riding experience. This engine specification made the Speed Twin a versatile machine for various riding conditions.

Riding the 1957 Speed Twin 5T offered a comfortable and engaging experience characteristic of its era. Its upright stance and well-padded seat provided an ergonomic setup suitable for longer journeys as well as shorter commutes. The handling was predictable and stable, thanks to a chassis that had been honed over years of production. While not designed for aggressive cornering, the Speed Twin offered a confident feel on the road, with adequate braking for the speeds it could achieve. It was a motorcycle built for practicality and enjoyment, rather than outright speed records.

The 1957 Triumph Speed Twin 5T was primarily aimed at the everyday motorcyclist seeking a reliable, stylish, and enjoyable machine for general transportation and leisure rides. It appealed to riders who appreciated the classic British twin aesthetic and the proven engineering of Triumph. Its approachable power and comfortable ergonomics made it suitable for a wide demographic, from experienced riders to those looking for a dependable mid-range motorcycle. The Speed Twin's enduring appeal lies in its combination of classic styling, a tractable engine, and a genuinely usable riding experience.

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Pros (Advantages)

✅ Why buy this bike?

• Classic British parallel-twin engine offers iconic sound and a quintessential vintage riding experience. • Relatively lightweight and nimble for its era, making it enjoyable on winding country roads. • Robust construction and simple mechanics mean easier maintenance and potential for long-term reliability. • High collectibility and appreciation potential among vintage motorcycle enthusiasts and collectors. • Distinctive styling with chrome accents and period-correct paint schemes turns heads wherever it goes. • A foundational model in Triumph's history, representing a significant step in motorcycle development.
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Cons (Disadvantages)

⚠️ Things to consider

• Drum brakes offer limited stopping power compared to modern disc systems, requiring anticipation. • Suspension technology is basic, leading to a less refined ride over rough or uneven surfaces. • Electrical system is 6-volt, often prone to issues and less powerful than modern 12-volt setups. • Parts availability can be challenging for some specific components, requiring specialist knowledge. • Kickstart only operation may be difficult for some riders, especially when cold or out of tune.
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License Class (EU)

The Triumph Speed Twin 5 T produces 27 HP, fitting A2 license limits (max 35 kW / 47 HP). For riders 18+.

Fuel Economy & Running Costs

Estimated average for 498cc class: 45-60 mpg (4.0-5.5 L/100km)

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Insurance Class

Insurance grouping for Triumph Speed Twin 5 T (498cc):

  • 📋 Group 8-15 — mid-range
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    Insurance Calculator (UK est.)

    Personalised premium estimate for the Triumph Speed Twin 5 T (UK rates):

    💡 Estimate based on UK market averages. For real quotes, compare on Compare the Market, MoneySuperMarket, GoCompare.

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    Find new and used Triumph Speed Twin 5 T 1957 listings:

    💡 Third-party listings. MotoBike Info is informational only.

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