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Triumph Bonneville T40 and T40 Black Revealed: Specs, Features and 2027 Arrival

The Bonneville T40 and T40 Black bring Triumph’s Bonneville name to a 398 cc single-cylinder platform. Here are the listed specs, features, seat options and expected release timing.
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Triumph revealed the Bonneville T40 and T40 Black internationally on 6 October 2026. The new 400cc-class models bring the Bonneville name to a 398 cc single-cylinder platform, with a 4-inch TFT, cruise control and cornering ABS among the listed equipment. Triumph has not announced prices yet: it expects to do so in early 2027, with motorcycles due in dealerships from spring 2027.

What are the Bonneville T40 and T40 Black?

The T40 and T40 Black are new motorcycles carrying Triumph’s Bonneville name. Triumph describes them as powered by dedicated versions of its TR Series engine. “Baby Bonnie” is a handy nickname for the smaller-capacity models, not Triumph’s formal model name.

Triumph says the aim was to deliver the style and ownership experience associated with a Bonneville in a lower-capacity category. That is the company’s positioning, not an independent road-test assessment. Chief Product Officer Steve Sargent said, “The Bonneville is one of the most significant motorcycles in Triumph’s history, so introducing a new model carrying that name comes with a responsibility to get it right.”

Triumph Bonneville T40 specifications

The figures below come from Triumph’s US product page and therefore describe that market’s listed specification. Equipment and homologation details may vary by country.

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Specification Triumph US listing
Engine 398 cc, liquid-cooled, single-cylinder, four-valve DOHC
Bore × stroke 89 × 64 mm
Compression ratio 12:1
Maximum power 32 PS / 30 bhp (22.8 kW) at 7,000 rpm
Maximum torque 36 Nm at 5,000 rpm
Fuel system Electronic fuel injection with electronic throttle control
Transmission Six-speed gearbox; wet multi-plate slip-and-assist clutch
Final drive X-ring chain
Frame and swingarm Steel hybrid spine/perimeter frame; twin-sided steel swingarm
Front suspension Telescopic forks
Rear suspension Twin shocks with preload adjustment
Brakes Single front and rear discs; Optimised Cornering ABS
Wheels and tyres Spoked aluminium wheels with tubed tyres; 100/90-18 front, 150/70 R17 rear
Seat height 790 mm standard
Wheelbase 1,418 mm
Wet weight 191 kg
Fuel capacity 3.8 US gallons

Triumph’s global launch information also gives a 790 mm standard seat height and says an optional low seat reduces it by 20 mm, to 770 mm. The US page lists the engine displacement as 398 cc; the launch material describes it more broadly as a 400cc TR Series engine.

Equipment and rider aids

Triumph lists a 4-inch circular TFT display with smartphone connectivity, navigation, and phone and music controls. The announced rider aids and convenience features include:

  • Five riding modes
  • Cruise control
  • Optimised Cornering ABS and Optimised Cornering Traction Control
  • Full LED lighting and self-cancelling indicators
  • Emergency Deceleration Warning
  • A USB-C charging socket

The US specification describes Optimised Cornering ABS at the single-disc brakes. The available information does not establish that every market will have an identical equipment specification.

What distinguishes the T40 Black?

Triumph has announced a standard T40 and a T40 Black variant. Its launch material highlights the family’s teardrop tank, round headlight, traditional engine profile, spoked wheels, twin rear shocks, two-tone paint, hand-painted coach lining, brushed peashooter silencer and aluminium engine covers.

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The announcement does not establish a performance difference between the two versions. Buyers should compare the final local specifications, paint and trim details, equipment and prices when Triumph publishes market-specific information.

Seat height, ergonomics and practical details

Triumph describes an upright riding position, bench seat and relaxed ergonomics. Those are manufacturer descriptions; comfort and confidence depend on rider size, fit and use. The optional black or brown low seat is listed as reducing the seat height from 790 mm to 770 mm. A comfort seat is also named among the planned accessories.

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A centre stand is standard, according to Triumph. It can make parking, cleaning and chain maintenance easier. The bike uses a chain final drive, so owners should follow the maintenance schedule and care instructions in the owner’s handbook.

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Price, release timing and accessories

Triumph says it will announce T40 and T40 Black pricing in early 2027 and expects the first motorcycles to arrive at dealerships from spring 2027. No confirmed price is provided in the company’s cited launch information, so online estimates should not be treated as official. Local timing and availability should be checked with a Triumph dealer.

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Triumph says a genuine accessories range is planned from launch. The global announcement names low and comfort seats and classic panniers. The US product page also describes a backrest and protection options including a radiator cover, aluminium sump guard and engine bars. Accessory availability and pricing require local dealer confirmation.

What Triumph says about the 400cc platform

Triumph reports that more than 60,000 motorcycles from its 400cc platform have sold across over 50 countries worldwide. This is a cumulative corporate-reported figure attributed to Triumph Motorcycles in 2026, rather than an independently audited statistic in the cited material. The company also lists a 10,000-mile (16,000-km) service interval for the T40.

What is not confirmed yet

The launch information does not provide confirmed country-by-country prices, dealer stock, accessory prices, independent road-test findings or real-world fuel economy. Triumph’s US specifications page notes that consumption and emissions measurements use regulation-specific test conditions and may not reflect real-world results; its displayed fuel-consumption unit is unusual, so it is not repeated here.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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