Beta BETA RR X-Pro 390 4-Stroke vs Triumph Speed 400 Base (2026)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Beta BETA RR X-Pro 390 4-Strokestacks up against the Triumph Speed 400 Base. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Beta BETA RR X-Pro 390 4-Stroke | Triumph Speed 400 Base |
|---|---|---|
| Model year | 2025 | 2026 |
| Price | — | $5,495 |
| Engine | 386 cc | 398 cc |
| Weight | — | 170 kg |
| Seat height | — | 790 mm |
| Fuel capacity | — | 13.0 L |
| Fuel type | petrol | petrol |
| Transmission | — | Manual, 6 speed, Chain |
| Front brakes | — | Hydraulic Disc |
| Rear brakes | — | Hydraulic Disc |
| Tires | Maxxis Enduro 21 / Maxxis Enduro 18 | Metzeler Sportec M9RR: 110/70 R17 / Metzeler Sportec M9RR: 150/60 R17 |
Beta BETA RR X-Pro 390 4-Stroke vs Triumph Speed 400 Base — which should you buy?
Picking between the Beta BETA RR X-Pro 390 4-Stroke and the Triumph Speed 400 Base usually comes down to the numbers you care about most. On paper, the Beta BETA RR X-Pro 390 4-Stroke brings its published horsepower, while the Triumph Speed 400 Base counters with its own power figure at 170 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: