Big Dog Mastiff vs American IronHorse Slammer Base (2011)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Big Dog Mastiffstacks up against the American IronHorse Slammer Base. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Big Dog Mastiff | American IronHorse Slammer Base |
|---|---|---|
| Model year | 2011 | 2010 |
| Price | $28,900 | — |
| Engine | 1917 cc | 1917 cc |
| Horsepower | — | 110 hp |
| Weight | 321 kg | 320 kg |
| Seat height | 24 mm | 25 mm |
| Fuel capacity | 4.6 L | 3.5 L |
| Fuel type | petrol | petrol |
| Transmission | 6-speed | 6-speed |
| Front brakes | Single disc. 4-piston Diff bore | Single disc. 4-piston polished calipers |
| Rear brakes | Single disc. 4-piston | Single disc. 4-piston polished calipers |
| Tires | MH120-21 / 300/35-18 | 120/80-R21 / 300/35-VR18 |
Big Dog Mastiff vs American IronHorse Slammer Base — which should you buy?
Picking between the Big Dog Mastiff and the American IronHorse Slammer Base usually comes down to the numbers you care about most. On paper, the Big Dog Mastiff brings its published horsepower in a 321 kg package, while the American IronHorse Slammer Base counters with 110 hp at 320 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: