Sym Adx 300 - 2025 Specifications and Reviews

The 2025 Sym ADX 300 is a practical maxi-scooter designed for urban commuters and riders seeking comfortable, efficient daily transportation. Powered by a 278cc liquid-cooled four-stroke engine producing 25.5 HP, it delivers dependable performance with automatic CVT transmission and modern EFI fuel injection. Known for its user-friendly nature and reliability, the ADX 300 excels as an affordable, low-maintenance alternative to small motorcycles.

2025
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General information

Color OptionsBlack, grey, white, Blue
CategoryScooter
ModelSym ADX 300
 
 

Engine and Transmission Specifications

StartingElectric
Emission DetailsEuro 5 Pluss
Final DriveBelt (final drive)
GearboxAutomatic
Cooling SystemLiquid
Fuel ControlSingle Overhead Cams (SOHC)
InductionInjection. EFI
Max Torque26.0 Nm (2.7 kgf-m or 19.2 ft.lbs) @ 6000 RPM
Capacity:278.3 ccm (16.98 cubic inches)
 
 

Physical measures and capacities

Fuel Capacity15.00 litres (3.96 US gallons)
Wheelbase1510 mm (59.4 inches)
Ground Clearance160 mm (6.3 inches)
Overall Width810 mm (31.9 inches)
Overall Length2185 mm (86.0 inches)
Overall Height1325 mm (52.2 inches)
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.

Sym Adx 300 dimensions and frame

Rear BrakesSingle disc. Bosh ABS.
Brake Disc Diameter230 mm (9.1 inches)
Front BrakesSingle disc. ABS.
Rear Tyre140/70-14
Front Tyre120/70-15
Rear SuspensionDual Shock
Front SuspensionTelescope fork

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Update specsReport missing specs or required updates.
Carrying CapacityUnderseat storage
LightingLED head light, LED position light, LED tail light, and LED turn indicators.
InstrumentsLCD instrument panel
DrivelineCVT
Power25.5 HP (18.6 kW)) @ 8000 RPM
Engine typeSingle cylinder, four-stroke
Year2025

Performance Profile & Rider Fit

25.5 hp
Peak Power
9.5s
0-60 mph

Best For

Track15%
City80%
Cornering55%
Daily Riding78%
Touring55%
Passenger60%

Rider Profile

Best ForSuitable for new to intermediate riders comfortable with automatic scooters, requiring no manual clutch or gear skills.
PurposeDesigned as a versatile urban and suburban commuter with enough highway capability for occasional longer rides.
Rider FitThe 790mm seat height and moderate 160mm ground clearance make it manageable for most rider heights, with light CVT operation easing physical effort.
CharacterA practical, maxi-style scooter blending everyday usability with a sportier stance and modern LED lighting and tech.
Not Ideal ForNot suited for off-road use, track riding, or riders seeking high-speed touring performance.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2025 Sym Adx 300 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 790mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2025 Sym Adx 300, with a moderate knee angle of around 110 degrees and a slightly forward riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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