The Harley-Davidson Road King Special motorcycle specifications include a 1,688 cc (103.00 cu in) engine, power of 87 hp (63.5 kW) @ 5,000 rpm, a 6-speed gearbox, and a listed weight of 372 kg (820.1 lb).
Key specifications
2018-2023Model years
1,688 ccDisplacement
87 hpPower
138.0 Nm @ 3,250 rpmTorque
372 kgWet weight
695 mmSeat height
22.7 LFuel tank
1,625 mmWheelbase
Model years covered
201820192020202120222023
Year-specific specification changes
The 2018 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
Bore × stroke
20192023102.0 x 114.3 mm (4.0 x 4.5 inches)
Compression ratio
2021202310.5:1
Displacement
201920231,868 cc (113.99 cu in)
Dry weight
20212023351.1 kg (774 lb)
Front suspension
20222023Telescopic fork, 49 mm dual bending valve
Power
2020100 hp (73.0 kW) @ 5,000 rpm
20222023100 hp (73.0 kW) @ 5,000 rpm
Rear suspension
20222023Twin shocks, premium low hand-adjustable
Torque
20192020165.4 Nm (16.9 kgf-m or 122.0 ft.lbs) @ 3,000 rpm
20212023160.0 Nm (16.3 kgf-m or 118.0 ft.lbs) @ 3,250 rpm
Wet weight
20212023366.1 kg (807 lb)
Carrying capacity
20222023Saddle bags, 2.5 cu ft volume
Exhaust system
2022V
Fuel consumption
201920205.47 L/100 km (18.3 km/l or 43.00 mpg)
202120225.23 L/100 km (19.1 km/l or 44.98 mpg)
20235.47 L/100 km (18.3 km/l or 43.00 mpg)
Greenhouse gases
20192020126.9 CO 2 g/km. (CO2 – Carbon dioxide emission)
20212022121.3 CO 2 g/km. (CO2 – Carbon dioxide emission)
2023126.9 CO 2 g/km. (CO2 – Carbon dioxide emission)
Ground clearance
20192023124 mm (4.9 inches)
Instruments
20212022Display features odometer, trip A, trip B, range to empty and gear indicator; and larger tell-tale indicators.
2023Gauges styled to complement each vehicle. Display features odometer, trip A, trip B, range to empty and gear indicator; and larger tell-tale indicators
Lights
2021High 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
20222023LED headlight
Power/weight ratio
20200.2817 hp/kg
202120230.2848 hp/kg
Seat height
20212023671 mm (26.4 inches)
Trail
20202023175 mm (6.9 inches)
Wheels
2020Gloss Black Prodigy
2022Gloss Black Prodigy wheels. Dunlop® Harley-Davidson Series tires.
2023Gloss Black Prodigy wheels. Dunlop® Harley-Davidson Series, bias blackwall tires.
Mechanical overview
Engine layout snapshot
V2, four-stroke • 1,688 cc • Air cooled • 87 hp
Chassis snapshot
Wheelbase 1,625 mmSeat 695 mmClearance 135 mm
6-speed • Belt (final drive) • 130/60-B19 front / 180/55-B18 rear
Additional useful specifications
| Front tire size | 130/60-B19 |
|---|---|
| Rear tire size | 180/55-B18 |
| Engine oil capacity | 4.90 L (5.18 US qt) |
| Estimated theoretical fuel range | 385 km |
| Power-to-weight ratio | 0.234 hp/kg |
| Power-to-weight | 233.9 hp/tonne |
| Specific power | 51.5 hp/L |
| Bore/stroke ratio | 0.88:1 (Undersquare) |
Model information
| Category | Touring |
|---|
Engine specifications
| Engine type | V2, four-stroke |
|---|---|
| Displacement | 1,688 cc (103.00 cu in) |
| Power | 87 hp (63.5 kW) @ 5,000 rpm |
| Torque | 138.0 Nm (14.1 kgf-m or 101.8 ft.lbs) @ 3,250 rpm |
| Bore × stroke | 98.4 x 111.3 mm (3.9 x 4.4 inches) |
| Compression ratio | 9.6:1 |
| Cooling system | Air |
| Fuel system | Injection. Electronic Sequential Port Fuel Injection |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Starter | Electric |
| Lubrication | Dry sump |
| Oil capacity | 4.90 L (5.18 US qt) |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Belt (final drive) |
| Clutch | Multi-plate with diaphragm spring in oil bath |
Chassis and suspension
| Front suspension | Telescopic fork |
|---|---|
| Rear suspension | Twin shocks |
| Rake | 26.0° |
| Trail | 170 mm (6.7 inches) |
Brakes, wheels and tires
| Front brakes | Double disc. ABS. 4-piston |
|---|---|
| Rear brakes | Single disc. ABS. 4-piston |
| Front tire | 130/60-B19 |
| Rear tire | 180/55-B18 |
| Wheels | Black, Turbine Cast Aluminum |
Dimensions and weight
| Wet weight | 372 kg (820.1 lb) |
|---|---|
| Dry weight | 355 kg (782.6 lb) |
| Seat height | 695 mm (27.4 inches) |
| Overall length | 2,420 mm (95.3 inches) |
| Wheelbase | 1,625 mm (64.0 inches) |
| Ground clearance | 135 mm (5.3 inches) |
| Carrying capacity | Saddle bags |
Fuel and emissions
| Fuel capacity | 22.71 L (6.00 US gal) |
|---|---|
| Fuel consumption | 5.90 L/100 km (16.9 km/l or 39.87 mpg) |
| Greenhouse gases | 136.9 CO 2 g/km. (CO2 – Carbon dioxide emission) |
Performance
| Power/weight ratio | 0.2451 hp/kg |
|---|
Electrical and instruments
| Instruments | Tank-mounted electronic speedometer with odometer, time-of-day clock on odometer; dual trip meter; low fuel indicator light and mileage countdown feature; low oil pressure indicator light; engine diagnostics readout; LED indicator lights; 6-speed indicator light |
|---|---|
| Lights | High beam, running lights, front fender running lights, directional light bar, neutral, low oil pressure, engine diagnostics, turn signals, security system (optional), 6-speed, low fuel warning, cruise control (optional), ABS (optional) |
Other specifications
| Color options | Vivid Black, Olive Gold, Industrial Gray Denim, Hard Candy Hot Rod Red Flake |
|---|---|
| Exhaust system | Black, 2-1-2 dual exhaust with tapered mufflers |
| Price as new | US$ 21999. Euro 24995. MSRP depends on country, taxes, accessories, etc. |
| Comments | Windshield. Cruise control. Security system. |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Harley-Davidson models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Harley-Davidson information before relying on them. Visit the official Harley-Davidson website.