Triumph has confirmed an official reveal event for October 6, 2026 at 12:00 BST (13:00 CEST), unveiling four new motorcycles at once. A teaser video dropped this week with enough silhouette and detail to point hard at the long-rumoured Bonneville 400 as the headline act — and I’ve already rearranged my evening around a livestream for a bike I probably won’t be able to afford a flight to go see in person.

Four bikes, one date, barely any specifics

Triumph is revealing four new motorcycles on October 6, 2026 at 12:00 BST, according to its own teaser campaign. The clip itself doesn’t name a single model — it’s four silhouettes and a countdown — but outlets reading the shapes have landed on a consistent guess: a retro roadster (the Bonneville 400), a sportier naked bike that looks like a Street Triple variant, and two adventure-styled machines pointing at the Tiger family. None of that is official yet. Triumph’s own communications say “four new motorcycles” and nothing else.

The Bonneville 400 has already been spied, and it looks the part

Spy shots from earlier this year show a near-final prototype wearing a sculpted fuel tank, a circular headlamp, round mirrors, a flat bench seat and a chrome grab rail — the full classic-roadster silhouette, not a styling exercise. The wheels are wire-spoke rather than cast, riding on conventional telescopic forks with rubber gaiters, and the rear end runs twin shocks instead of the Speed 400’s monoshock. A long peashooter-style exhaust and a broad rear fender with a compact tail lamp finish the look. Whatever Triumph calls it on October 6, this is clearly meant to read as a baby Bonneville, not a Speed 400 with new graphics.

What engine it’s likely to run

The Bonneville 400 is expected to share its platform with the Speed 400 and Scrambler 400X, both built on Triumph’s 398cc liquid-cooled single (39.5 hp, 37.5 Nm) developed with Bajaj in India. Indian coverage of the teaser specifically floats a smaller 349cc version of the same engine for the India-spec bike, likely to land under a local tax bracket, while international markets — Europe included — would be expected to keep the full 398cc unit. None of this is confirmed; it’s the same engine family Triumph already builds, not a new one, which is the detail that makes the speculation plausible rather than wishful.

Spec (speculative, platform-shared with Speed 400) Value
Engine 398cc liquid-cooled single (349cc for India, unconfirmed)
Power ~39.5 hp (Speed 400 figure; unconfirmed for Bonneville 400)
Torque ~37.5 Nm (Speed 400 figure; unconfirmed for Bonneville 400)
Front suspension Telescopic forks with gaiters (spied)
Rear suspension Twin shocks (spied) — Speed 400 uses a monoshock
Wheels Wire-spoke (spied) vs. Speed 400’s cast alloys
Reveal date 6 October 2026, 12:00 BST / 13:00 CEST

What this means if you’re shopping this segment in Europe

Triumph’s existing Speed 400 already undercuts a lot of assumptions about what a “premium” small-capacity bike costs, and it’s sold across the EU today. A Bonneville-badged version on the same running gear slots straight into the same retro-roadster shelf as Royal Enfield’s Classic 350 and Jawa’s own 350s — a segment Jawa’s All Stars 42 Bobber is also fighting over with cheap, repeated special editions rather than new engineering. If Triumph prices the Bonneville 400 close to the Speed 400, it undercuts most of the “heritage” segment on brand name alone, and gives European riders a small-capacity classic with a name that actually means something.

It’s also not the only manufacturer playing the “teaser countdown” game this season — BMW rode its own R20 undisguised in a teaser before its official reveal, and the pattern of near-final spy shots arriving weeks before an orchestrated unveiling is basically the industry’s standard playbook now. At least this one gives me a specific date to stop refreshing motorcycle forums and just wait.

What we know

  • Triumph has confirmed a reveal event for October 6, 2026, at 12:00 BST, covering four new motorcycles.
  • Spy shots from earlier this year show a near-production Bonneville 400 prototype with wire-spoke wheels, twin shocks, a peashooter exhaust and classic roadster styling.
  • The bike is widely expected to share its 398cc single-cylinder engine with the existing Speed 400 and Scrambler 400X, with a smaller 349cc version rumoured for the India market.

What’s still unclear

  • Whether “Bonneville 400” is the actual name Triumph will use, or whether the three other bikes are genuinely Street Triple and Tiger-family variants as outlets are guessing.
  • Full specifications, pricing, and confirmed European availability — none of this has been stated by Triumph.
  • Whether the India-spec 349cc engine (if real) is purely a local-market variant or signals a wider lineup split.

FAQ

When is Triumph’s next motorcycle reveal?

October 6, 2026, at 12:00 BST (13:00 CEST), according to Triumph’s own teaser campaign.

How many new motorcycles is Triumph revealing?

Four. Triumph hasn’t named them, but a retro roadster (expected to be the Bonneville 400), a sportier naked bike, and two adventure-styled machines are the models outlets have inferred from the teaser silhouettes.

What engine will the Bonneville 400 use?

It’s expected to share the 398cc liquid-cooled single from the Speed 400 and Scrambler 400X, with a smaller 349cc version rumoured for the India market specifically. Neither figure is confirmed.

Will the Bonneville 400 be sold in Europe?

Not yet confirmed, but its presumed platform-mates, the Speed 400 and Scrambler 400X, are both already sold across the EU, so European availability would be the expected outcome if the bike is revealed as rumoured.

Reporting via: rushlane.com, soymotero.net, motor16.com