Mistakes When Buying Electric Bikes and How to Avoid Them

What changes the outcome

La mayoría de los problemas no vienen from the producto, vienen de cómo se usa. Aquí tienes lo que sí marca diferencia, en orden de impacto, con los pasos concretos y los errores que se repiten una y otra vez. Nada de consejos genéricos: cosas que puedes aplicar hoy mismo y notar mañana.

Parking and traffic rules change from city to city

For traffic purposes an EPAC is a bicycle, so it generally rides in the bike lane and on the road according to local bylaws, but each town regulates sidewalks, parks and parking differently. There are cities where a helmet is compulsory for minors, others with specific speed limits in pedestrian areas. Before using it daily to commute, half an hour reading the local bylaws avoids avoidable fines.

Watt-hours, not amp-hours, tell you how far you'll get

A battery advertised as "15 Ah" isn't comparable to another at "13 Ah" if they have different voltages. The useful figure is Wh = volts × amp-hours: una de 36 V y 15 Ah son 540 Wh, y una de 48 V y 13 Ah son 624 Wh, más capacidad aunque el número de Ah sea menor. Como referencia práctica, un ciclista consume from the orden de 7 to 15 Wh per kilometer depending on the assistance level, the terrain and the total weight.

An e-bike's motor wears out the drivetrain much faster

The extra power runs through the same chain, the same sprockets and the same chainring as on a conventional bike, and wear speeds up noticeably. A chain that lasts thousands of kilometers on a normal bike may need replacing much sooner on an e-bike. What saves money is measuring chain stretch with a gauge and replacing it in time: a cheap chain replaced in time saves an expensive cassette and chainring.

The torque sensor is what makes an e-bike feel good

This is the difference between a bike that responds and one that surges. A cadence sensor only detects whether the pedals are turning, so the motor kicks in suddenly and with a delay: the bike surges on its own and then cuts out. A torque sensor measures how much force you apply and multiplies that force proportionally, so the assistance feels like having stronger legs. It's the component that most defines the experience and the one most cut back on cheap models.

• Material and build quality
• Recent verified reviews (3-4 stars included)
• Warranty and return policy
• Current price versus its historical average
• Reputación from the vendedor
• That the key features match your use case (Everyday Use)

Batería integrada or extraíble no es una cuestión estética

A battery removable you carry it up to charge, swap it for another on a ride and can replace it without a workshop when it ages. A integrated in the frame queda más limpia y protegida, pero obliga a llevar la bici al enchufe y, en algunos modelos, a pasar por taller para sustituirla. Si aparcas en la calle or en un garaje sin corriente, la extraíble no es una preferencia: es la única opción viable.

Criteria	ADO A20 AirOur pick	NCM Milano
Ideal for	Balanced, general-purpose use	Everyday Use
Strength	Value for money	Specific features
Ratings	Very positive and numerous	Positive
Indicative price	from ~€160	from ~€100
Recommendation	Our pick	Best alternative
See on Amazon	See price →	See price →

The mid-drive motor and the hub motor completely change the bike

A mid-drive motor (at the bottom bracket) pushes through the drivetrain, so use the gears: it climbs hills with real force, keeps the weight centered and low, and the bike handles naturally. A motor in the wheel hub is cheaper and quieter but always pushes the same regardless of the gear, which shows badly on long climbs, and it throws off the weight distribution. If you're going to ride terrain with gradients, the difference is huge and justifies the extra cost.

To wrap up

Apply what's above first, since that's what makes the biggest difference, and leave the rest for once you've got some experience. If after that you're still not getting what you're after, then it does make sense to switch gear: the ADO A20 Air is the most well-rounded option to make the jump, with the NCM Milano as an alternative.

Frequently asked questions

Cómo cargo la batería para que dure años?

Keep it between 20% and 80% day to day, and charge to 100% only before a long ride. To store it for weeks, leave it at 50-60% in a cool, dry place. Avoid full discharges and don't leave it charging outdoors in winter.

Motor central or en la rueda?

Mid-drive if there are hills: it uses the gears, climbs with real force and the bike handles in balance. In the wheel if it's all flat city riding and you're after price: it's cheaper and quieter, but it always pushes the same and bogs down on long climbs.

Merece la pena convertir mi bici con un kit?

Sale más barato, pero el cuadro, la horquilla y las llantas no están dimensionados para el peso y las fuerzas from the motor. Los fallos típicos son spokes that break, dropouts that give way and inadequate brakes. It can work on a sturdy bike for flat, gentle use; I wouldn't recommend it for hills and intense daily use.

Cuánto durará la batería antes de perder capacidad?

It's measured in charge cycles, not years, and the degradation is gradual: you'll first notice fewer kilometers, not a sudden failure. With good care, several hundred cycles while keeping most of the capacity. Check before buying whether the battery is sold separately para ese modelo: eso decide si la bici dura una década or se convierte en chatarra.

Necesito seguro, casco or carné?

A legal electric bike (assists up to 25 km/h, 250 W nominal motor) is a bicycle in legal terms: it needs no license, plate or compulsory insurance, and the helmet follows the same rules as on a conventional bike depending on the road and age. Check the local bylaws, because local rules vary.

Should I go with the ADO A20 Air or the NCM Milano?

The ADO A20 Air is the most well-rounded option and the one we recommend by default. The NCM Milano makes sense if your priority is Everyday Use. As a budget reference, the sensible range starts around €100 and the best balance is usually around €160.

By the VoltRide Team · reviewed by

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