Triumph Rocket 3 Storm GT vs Viper Diamondback (2026)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Triumph Rocket 3 Storm GTstacks up against the Viper Diamondback. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Triumph Rocket 3 Storm GT | Viper Diamondback |
|---|---|---|
| Model year | 2026 | 2015 |
| Price | $27,145 | — |
| Engine | 2458 cc | 2491 cc |
| Torque | — | 216 Nm |
| Weight | 320 kg | 299 kg |
| Seat height | 750 mm | 24 mm |
| Fuel capacity | 18.0 L | — |
| Fuel type | petrol | petrol |
| Transmission | Manual, 6 speed, Shaft | 6-speed |
| Front brakes | Dual Hydraulic Disc | Single disc. 4-piston, chromed |
| Rear brakes | Hydraulic Disc | Single disc |
| Tires | Avon Cobra Chrome: 150/80 R17 V / Avon Cobra Chrome: 240/50 R16 V | 120/70-21 / 260/40-18 |
Triumph Rocket 3 Storm GT vs Viper Diamondback — which should you buy?
Picking between the Triumph Rocket 3 Storm GT and the Viper Diamondback usually comes down to the numbers you care about most. On paper, the Triumph Rocket 3 Storm GT brings its published horsepower in a 320 kg package, while the Viper Diamondback counters with its own power figure at 299 kg.
Our spec tables above highlight the winning number on each line. For the full rider-focused reviews including real-world fuel economy, service costs and available colors, click into either bike: