Triumph 2500 Rocket III GT Storm 2026 — Specifications

Who could possibly need 2,458 cc between their legs? Triumph, clearly, keeps answering a question nobody's asking. And thank goodness for that. The 2026 Rocket III GT Storm pushes the envelope even further on a machine that was already a mechanical sideshow phenomenon. The biggest three-cylinder engine ever fitted to a production motorcycle gains 15 horsepower over the previous version thanks to revised valve timing and a compression ratio bumped to 10.8:1. The result: 182 hp at 7,000 rpm and 225 Nm of torque at 4,000 rpm. Numbers that would put some sportbikes to shame, except this thrust arrives with all the subtlety of a freight train barreling downhill. The Ducati Diavel V4, with its 168 hp, almost looks like a sensible machine by comparison.

That extra horsepower comes at a cost in revs. You need to climb higher in the range to extract full power, which adds an almost sporty dimension to a 320 kg wet-weight beast. Torque remains king, available from the midrange onward, delivered to 240 mm of rear rubber through a six-speed gearbox and shaft drive. Metzeler supplies its Cruisetec tires to keep all of that planted on the tarmac. The braking is no joke either: radially mounted Brembo four-piston calipers bite 320 mm discs up front, complemented by a 300 mm rear disc with a four-piston caliper as well. The same level of hardware you'd find on a Panigale or a ZX-10R. On a three-quarter-ton cruiser, that's reassuring.

The chassis remains true to the previous model. The aluminum frame, 47 mm inverted fork with 120 mm of travel, and the rear monoshock anchored to the single-sided swingarm are unchanged. Only the wheels have been redesigned, shedding one kilo total. The GT sets itself apart from the R version with comfort-oriented ergonomics: handlebars set 125 mm further back, a low 750 mm seat height, and footpegs adjustable across three positions. The passenger benefits from a padded seat and a height-adjustable sissy bar. A taller windscreen and standard heated grips round out the package. It's a tourer disguised as a muscle bike, built to devour miles with a riding partner on the back.

Style-wise, the Storm plays the full blackout card. Subframe, fork yokes, exhaust, controls, levers, caliper brackets, headlight bezels, kickstand — everything gets the dark treatment. Only the fuel cap, the steel belt, and a few machined highlights on the engine block still catch the light. The effect works: imposing and menacing without crossing into parody. The electronics remain unchanged, and the package was already generous: four riding modes, traction control with lean-angle sensor, cornering ABS, full LED lighting, keyless ignition, color TFT dash, cruise control, and a USB port under the seat. The quickshifter remains optional, which stings a bit at this price point.

Because the price tag is steep: €27,695. That's what it costs to ride the most outrageous motorcycle on the market, capable of hitting 240 km/h despite the proportions of a locomotive. The Rocket III GT Storm is aimed neither at beginners nor at riders chasing lightness. It targets lovers of raw sensation — those who want to feel the engine thrumming beneath them and watch car mirrors fold in their wake. A machine without equal, excessive by nature, Euro 5+ homologated by some miracle. Triumph proves once again that good taste and restraint don't necessarily make the most memorable motorcycles.