Harley-Davidson FLSTFI Softail Fat Boy vs Harley-Davidson FLSTS Heritage Springer (2005)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Harley-Davidson FLSTFI Softail Fat Boystacks up against the Harley-Davidson FLSTS Heritage Springer. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Harley-Davidson FLSTFI Softail Fat Boy | Harley-Davidson FLSTS Heritage Springer |
|---|---|---|
| Model year | 2005 | 2003 |
| Price | — | — |
| Engine | 1449 cc | 1449 cc |
| Torque | 101 Nm | 110 Nm |
| Weight | 307 kg | 340 kg |
| Seat height | 25 mm | 26 mm |
| Fuel capacity | 5.0 L | 5.2 L |
| Fuel type | petrol | petrol |
| Transmission | 5-speed | — |
| Front brakes | Double disc | — |
| Rear brakes | Single disc | — |
| Tires | MH90-B16 / 150/80-16 | — |
Harley-Davidson FLSTFI Softail Fat Boy vs Harley-Davidson FLSTS Heritage Springer — which should you buy?
Picking between the Harley-Davidson FLSTFI Softail Fat Boy and the Harley-Davidson FLSTS Heritage Springer usually comes down to the numbers you care about most. On paper, the Harley-Davidson FLSTFI Softail Fat Boy brings its published horsepower in a 307 kg package, while the Harley-Davidson FLSTS Heritage Springer counters with its own power figure at 340 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: