1955 DKW RT 350 S Technical Analysis & Specification Breakdown
At the heart of the 1955 DKW RT 350 S allround motorcycle, DKW relies on a 348 cc (21.2 cu in) air-cooled twin, two-stroke powerplant. In factory specification, peak output is rated at 18.5 HP (13.5 kW) at 5,000 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 53.2 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the RT 350 S measures 162 kg (357 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (8.76 kg per horsepower). Rider ergonomics and chassis geometry center around a 750 mm (29.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops.
Within MotoLibrary's DKW archive, this model family spans 2 indexed model years from 1955 to 1956, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
53.2 HP/L
Power-to-Weight
0.11 HP/kg (8.76 kg/HP)
Standover Height
750 mm (29.5 in)
Engine
Displacement348.0 ccm (21.23 cubic inches)
Engine TypeTwin, two-stroke
Engine DetailsTwin, two-stroke
Power18.5 HP (13.5 kW)) @ 5000 RPM
Compression6.3:1
Bore x Stroke62.0 x 58.0 mm (2.4 x 2.3 inches)
Fuel SystemCarburettor
CoolingAir
Transmission
Final DriveChain (final drive)
Performance
Top Speed120.0 km/h (74.6 mph)
Fuel Consumption3.80 litres/100 km (26.3 km/l or 61.90 mpg)
Greenhouse Gases88.2 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Front SuspensionTelescopic
Rear SuspensionSwingarm
Wheels & Brakes
Front Tyre3.50-18
Rear Tyre3.50-18
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
WheelsSpoked
Dimensions & Weight
Dry Weight162.0 kg (357.1 pounds)
Power/Weight0.1142 HP/kg
Seat Height750 mm (29.5 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
