Triumph Rocket 3 GT Evel Knievel Limited Edition vs Viper Diamondback (2025)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Triumph Rocket 3 GT Evel Knievel Limited Editionstacks up against the Viper Diamondback. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Triumph Rocket 3 GT Evel Knievel Limited Edition | Viper Diamondback |
|---|---|---|
| Model year | 2025 | 2015 |
| Price | — | — |
| Engine | 2458 cc | 2491 cc |
| Torque | — | 216 Nm |
| Weight | — | 299 kg |
| Seat height | — | 24 mm |
| Fuel type | petrol | petrol |
| Transmission | — | 6-speed |
| Front brakes | — | Single disc. 4-piston, chromed |
| Rear brakes | — | 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 GT Evel Knievel Limited Edition vs Viper Diamondback — which should you buy?
Picking between the Triumph Rocket 3 GT Evel Knievel Limited Edition and the Viper Diamondback usually comes down to the numbers you care about most. On paper, the Triumph Rocket 3 GT Evel Knievel Limited Edition brings its published horsepower, 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: