Triumph Rocket 3 Storm GT vs Viper Black Diamond (2026)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Triumph Rocket 3 Storm GTstacks up against the Viper Black Diamond. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Triumph Rocket 3 Storm GT | Viper Black Diamond |
|---|---|---|
| Model year | 2026 | 2015 |
| Price | $27,145 | $55,000 |
| Engine | 2458 cc | 2491 cc |
| 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 Black Diamond — which should you buy?
Picking between the Triumph Rocket 3 Storm GT and the Viper Black Diamond 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 Black Diamond counters with its own power figure at 299 kg. On price, the Triumph Rocket 3 Storm GT has the lower MSRP.
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: