14 August. Friday 2026
Harley-Davidson Road King - 2021 Specifications and Reviews
The 2021 Harley-Davidson Road King is a classic American touring cruiser built for long-distance highway comfort and style. Its Milwaukee-Eight 107 V-twin engine delivers smooth, accessible power ideal for experienced cruiser riders seeking traditional aesthetics with modern reliability. Best known for commanding presence, iconic design, and genuine touring capability with exceptional low-end torque.
2021
General information | |
| Price as new | 3.9 See the detailed rating of touring capabilities, reliability, accident risk, etc. Compare with any other motorbike. |
| Category | Touring |
| Year | 2021 |
| Model | Harley-Davidson Road King |
Engine and Transmission Specifications | |
| Exhaust system | Chrome, 2-1-2 dual exhaust with tapered mufflers |
| Greenhouse gases | 121.3 CO2 g/km. (CO2 - Carbon dioxide emission) |
| Fuel consumption | 5.23 litres/100 km (19.1 km/l or 44.98 mpg) |
| Driveline | Chain, 34/46 ratio primary drive |
| Clutch | Multi-plate with diaphragm spring in oil bath |
| Transmission type | Belt (final drive) |
| Gearbox | 6-speed |
| Cooling system | Air |
| Lubrication system | Dry sump |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Fuel system | Injection. Electronic Sequential Port Fuel Injection |
| Bore x Stroke | 100.0 x 111.1 mm (3.9 x 4.4 inches) |
| Compression | 10.0:1 |
| Torque | 150.5 Nm (15.3 kgf-m or 111.0 ft.lbs) @ 3250 RPM |
| Power | 89.0 HP (65.0 kW) @ 5450 RPM |
| Engine details | Milwaukee-Eight® 107, Integrated Oil-Cooler |
| Engine type | V2, four-stroke |
| Capacity: | 1746.0 ccm (106.54 cubic inches) |
| | |
Brakes, suspension, Frame and wheels | |
| Wheels | Slicer II Cast Aluminum |
| Rear brakes | Single disc. ABS. 4-piston |
| Front brakes | Double disc. ABS. 4-piston |
| Rear tire | 180/55-B18 |
| Front tire | 130/70-B18 |
| Rear Suspension | Twin shocks |
| Front Suspension | Telescopic fork |
| Trail | 170 mm (6.7 inches) |
| Rake (fork angle) | 26.0° |
| | |
Physical measures and capacities | |
| Oil capacity | 4.90 litres (5.18 US quarts) |
| Fuel capacity | 22.71 litres (6.00 US gallons) |
| Wheelbase | 1625 mm (64.0 inches) |
| Ground clearance | 135 mm (5.3 inches) |
| Overall length | 2450 mm (96.5 inches) |
| Seat height | 668 mm (26.3 inches) If adjustable, lowest setting. |
| Power/weight ratio | 0.2471 HP/kg |
| Weight incl. oil, gas, etc | 375.6 kg (828.0 pounds) |
| Dry weight | 360.2 kg (794.0 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Comments | Windshield. Cruise control. Alarm. |
| Carrying capacity | Saddle bags |
| Light | High beam, running lights, directional light bar, neutral, low oil pressure, engine diagnostics, turn signals, battery, security system, low fuel warning, cruise control, ABS, Gear/RPM display, miles to empty display |
| Instruments | Display features odometer, trip A, trip B, range to empty and gear indicator; and larger tell-tale indicators. |
| Starter | Electric |
| Color options | Vivid Black, Billiard Red, Midnight Crimson Red/Stone Washed White Pearl |
Performance Profile & Rider Fit
89 hp
Peak Power
5.2s
0-60 mph
Best For
Track10%
City40%
Cornering35%
Daily Riding60%
Touring95%
Passenger85%
Rider Profile
| Best For | This is a bike best suited to riders who already have experience handling heavy motorcycles at low speeds and in traffic. |
| Purpose | It's built for effortless long-distance highway cruising with a classic Harley touring character, not for outright speed or sporty cornering. |
| Rider Fit | The low seat height helps shorter riders, but the substantial dry weight over 360 kg demands confident strength and balance when maneuvering at a standstill or parking. |
| Character | A laid-back, torque-rich V-twin cruiser that rewards relaxed throttle inputs and steady, sweeping roads over aggressive riding. |
| Not Ideal For | This is not the right bike for riders wanting sharp handling, off-road capability, or a lightweight machine for quick city darting. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
Rider Reviews
Total comments: 1
MotorcycleDB Review
The 2021 Harley-Davidson Road King is a true icon in the world of motorcycles. With its classic design and powerful performance, this bike is a favorite among riders who crave the open road. The Road King features a Milwaukee-Eight 114 engine, delivering impressive torque and acceleration. Its comfortable seating and spacious saddlebags make it an ideal choice for long rides. The bike also comes equipped with modern technology, including a touchscreen infotainment system and advanced rider aids. Overall, the 2021 Harley-Davidson Road King is a timeless machine that offers a perfect balance of style, comfort, and performance. If you're in the market for a top-of-the-line touring bike, the 2021 Harley-Davidson Road King is worth considering. With its legendary status and outstanding performance, this motorcycle delivers an unmatched riding experience. Whether you're cruising down the highway or exploring winding backroads, the Road King is sure to impress. Plus, its classic design and modern features make it a standout choice in the motorcycle market. If you're looking for a reliable and stylish touring bike, the 2021 Harley-Davidson Road King is a top contender.Add a Comment
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