The 2026 Triumph Tiger Sport 660 receives the same engine upgrades as the Trident, with the 660cc inline-triple now producing 95hp at 11,250rpm and 68Nm at 8,250rpm. The bike now gets a larger 18.6-litre fuel tank, which should extend range for long-distance riding. New bodywork includes updated radiator cowls that offer better weather protection, while the adjustable windscreen provides a wider range of coverage. The bike's styling gets a more substantial front end and angular side profile.

Suspension remains touring-oriented with Showa USD forks and a rear monoshock, both offering 150mm of travel. The rear shock features remote preload adjustment for easy adaptation when carrying a pillion or luggage. Despite the added touring equipment, the bike weighs 211kg (wet). Electronics mirror the Trident with three riding modes, IMU-based cornering ABS and traction control, cruise control, Triumph Shift Assist, and full LED lighting.