Comparison 2E EB19 vs SAMEBIKE RS-A08

The maximum weight for which the frame, wheels, suspension, brakes, and other components of the electric bike are designed. This usually implies the weight of the rider along with baggage and accessories: for example, a backpack, basket, child seat, or load on the luggage rack. It is not advisable to exceed this limit, as the additional weight reduces maneuverability, increases braking distance, and accelerates wear on the wheels, spokes, hubs, and frame.

Approximate distance that an electric bike can travel on a single battery charge. Specifications usually indicate an estimated value, as the actual range depends on the chosen level of assistance, rider's weight, terrain, speed, temperature, and tire pressure. For example, in economy mode, an e-bike can travel significantly further than when constantly riding with maximum support and speed downhill.

The electric motor rating in watts, which shows how actively it assists during acceleration, uphill riding, and riding with a load. For relaxed city trips and bike paths, a motor of around 250 W is often sufficient; for suburban routes, hills, and heavier riders, a reserve of 350–500 W is more convenient, while ratings of 750 W and above are more common on powerful fat bikes, cargo, and off-road models. When choosing, keep in mind that high power drains the battery faster and does not always mean higher speed: actual performance is also affected by torque, bike weight, battery capacity, and controller settings.

The maximum speed at which an electric bike can accelerate using the electric motor. For relaxed city rides and bike paths, models with a limit of around 25 km/h are usually sufficient, while options with speeds of approximately 30–35 km/h are found for suburban routes and more dynamic riding. Higher speeds are more common in powerful off-road bikes, fat bikes, and high-speed models.

It is worth considering that the actual speed depends on the motor's power, rider's weight, battery charge, terrain, wind, and controller settings. In some cases, it may also be limited by traffic regulations or firmware.

A system of spring, air, or elastomer elements that softens impacts from bumps and makes riding more comfortable. Suspension affects the intended use of the bicycle.

— Front. A suspension fork is installed at the front and softens impacts on the front wheel. This is the most common option for city, leisure, mountain, and touring e-bikes: it helps with curbs, potholes, paving stones, gravel, and light off-road terrain without making the bicycle too heavy or complicated.

— Front and rear. Suspension is provided both at the front and rear, so bumps are absorbed by both wheels. This setup is better suited for trails, forest roads, rocks, roots, descents, and active riding, but makes the e-bike more expensive, heavier, and more demanding to maintain.

— Rear. A shock absorber is installed at the rear and softens impacts from the rear wheel or the seat area of the frame. This option is less common than front suspension and can be useful for increasing comfort on uneven roads, especially if the main load falls on the saddle and rear of the bicycle.

— None. A rigid design without shock absorbers is simpler, lighter, and cheaper to maintain. It is well suited for smooth asphalt, bike paths, and relaxed city routes, but on potholes, paving stones, dirt roads, and curbs it will transfer more impacts to the hands, back, and frame.

The type of rear suspension describes the design of the rear shock absorber of the electric bicycle: how the element compresses during impact and how effectively it dampens the frame oscillation. This parameter is important for full-suspension bikes, fat bikes, and models for rough roads, as the rear shock absorber affects saddle comfort, rear wheel traction, and bike behavior on uneven surfaces.

— Spring-elastomer. Uses a metal spring and an elastomer insert inside to help absorb shocks. It's a simple and inexpensive solution for city and light trail electric bikes, but it’s less smooth, adjustable, and stable compared to more advanced oil systems.

— Spring-oil. A metal spring takes the compression, while oil dampens excessive oscillation after impact. This suspension is usually more reliable and stable than spring-elastomer types, suitable for broken asphalt, dirt roads, and moderate off-roading but heavier than air variants.

— Air. The elastic element is an air chamber, and the pressure can be adjusted according to the user's weight and riding style. This rear suspension is lighter than spring types and convenient for precise adjustment, often found in more advanced e-bikes, although it requires pressure monitoring and more careful maintenance.

— Air-oil. In this rear suspension, air acts as the elastic element, while oil ensures smooth compression and controlled rebound. It can be finely adjusted for rider weight, active riding,...trails, and mountain routes, but it is usually more expensive and requires regular maintenance.

Ampere-hours indicate the electric charge that an e-bike battery can deliver during operation. This value helps roughly estimate how long the motor can be powered, but on its own it does not provide an accurate understanding of the range, because it does not take the battery voltage into account. For example, 10 Ah batteries at 36 V and 48 V will have different energy reserves, even though their ampere-hour rating is the same. Therefore, it is useful to consider Ah together with voltage and capacity in Wh.

Watt-hours indicate the total energy reserve of the battery and are more suitable for comparing the range of different electric bicycles. This measure takes into account both the capacity in amp-hours and the system voltage: for example, a 36V battery with 10Ah has about 360Wh, while a 48V battery with 10Ah has about 480Wh. The higher the Wh value, the greater the potential range, but the actual distance still depends on the rider's weight, motor power, terrain, speed, assistance mode, and temperature.

The operating voltage of the battery system for which the motor, controller, charger, and electronics of the electric bicycle are designed. 36 V systems are more common in urban, leisure, and moderately powered models, while 48 V systems are typically used where stronger uphill traction, dynamic acceleration, or riding with a load is required. When replacing the battery, the voltage must match the bicycle’s original system; otherwise, the electronics may function incorrectly or fail.