| General |
| Year | 2010 | 2025 |
| Make Model | Triumph Rocket III Roadster | Harley Davidson Softail Fat Boy 117 |
| Dimensions |
| Seat Height | 750 mm / 29.5 in | Unladen 675 mm / 26.6 in Laden 658 mm / 25.9 in |
| Wheelbase | 1695 mm / 66.7 in | 1650 mm / 65 in |
| Ground Clearance | - | 125 mm / 4.9 in |
| Height | 1165 mm / 45.8 in | 1120 mm / 44.1 in |
| Length | 2500 mm / 98.3 in | 2365 mm / 93.1 in |
| Width | 970 mm / 38.2 in (Handlebars) | 965 mm / 40.0 in |
| Weights & Capacities |
| Wet Weight (kg) | 367 | 315 |
| Dry Weight (kg) | 320 | 303 |
| Dry Weight | 320 kg / 704 lbs | 303 kg / 668 lbs |
| Fuel Capacity | 24 Litres / 6.3 US gal / 5.3 Imp gal | 18.9 Litres / US 5.0 gal |
| Wet Weight | 367 kg / 807 lbs | 315 kg / 694 lbs |
| Performance |
| Max Power | 109 kW 146 hp @ 5750rpm | 77 kW / 104Hp @ 4800 rpm |
| Max Torque | 221Nm / 22.5 kgf-m / 163 ft.lbs @ 2750rpm | 171 Nm / 126 lb-ft @ 3000 rpm |
| Engine |
| Displacement | 2294 cc / 140 cu in | 1923 cc / 117 cu in |
| Engine Detail | Four stroke, longitudinal three cylinder, DOHC, 4 valves per cylinder. | Four stroke, V-Twin, 2 Milwaukee-Eight 117 custom, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder |
| Bore x Stroke | 101.6 x 94.3 mm | 103.5 x 114.3 in |
| Compression Ratio | 8.7:1 | 10.3:1 |
| Cooling System | Liquid cooled | Air cooled |
| Exhaust | - | 2-into-2 staggered, catalyst in muffler |
| Fuel Induction | Multipoint sequential electronic fuel injection | Electronic Sequential Port Fuel Injection (ESPFI) |
| Ignition | Digital inductive type via electronic engine management | Single-fire, non-wasted, map-controlled spark ignition |
| Lubrication | - | Pressurized, dry-sump with oil cooler |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | Wet, multi-plate | Mechanical, 10 plate wet, assist & conventional |
| Final Drive | Shaft | Belt, 32/66 ratio |
| Gear Ratios | 1st: 41/14 / 2nd: 37/19 / 3rd: 33/23 / 4th: 29/25 / 5th: 27/28 | 1st 9.311 / 2nd 6.454 / 3rd 4.793 / 4th 3.882 / 5th 3.307 / 6th 2.79 |
| Primary Drive | - | Chain, 34/46 ratio |
| Transmission / Drive | 5 Speed, constant mesh | 6 Speed |
| Chassis |
| Frame Type | Tubular steel, twin spine | Mild steel, tubular frame, rectangular section backbone, stamped, cast, and forged junctions, MIG welded, aluminum forged fender supports |
| Suspension - Front | Kayaba 43 mm upside down forks | Dual bending valve 49mm telescopic with aluminum fork triple clamps, dual rate spring, "beer can" covers |
| Suspension - Rear | Kayaba black spring twin shocks with 5 position adjustable preload | Hidden, free piston, coil-over monoshock, 43mm stroke, hydraulic preload adjustment |
| Lean Angle | - | 25.6° |
| Rake | 32° | 30° |
| Swingarm | - | Mild steel, tubular sections, stamped x-member, forged axle junctions, MIG welded, removable belt spacer |
| Trail | 148 mm / 5.8 in | 104 mm / 4.1 in |
| Wheel Travel - Front | 120 mm / 4.7 in | 130 mm / 5.1 in |
| Wheel Travel - Rear | 105 mm / 4.1 in | 86 mm / 3.4 in |
| Wheels & Brakes |
| Brakes - Front | 2 x 320 mm Discs, 4 piston calipers | 2 x 300mm discs, 4 piston fixed caliper |
| Brakes - Rear | Single 316 mm disc, 2 piston caliper | Single 292mm disc, 2 piston floating caliper |
| ABS | - | Standard |
| Tyres - Front | 150/80 V17 | 160/60R18,70V,BW |
| Tyres - Rear | 250/50 V16 | 240/40R18,79V,BW |
| Wheels | - | Machined, Lakester cast aluminum |
| Wheels - Front | Alloy 5-spoke, 17 x 3.5in | 18 x 4,5 in |
| Wheels - Rear | Alloy 5-spoke, 16 x 7.5in | 18 x 8.0 in |