Generally speaking, European standards limit motor power to 250 W for EABs. However, motor torque (between 50 and 85 Nm) will have a far greater impact on the bike's ability to climb steep hills.
Choosing an electric MTB : the essential criteria for making the right decision
Sometimes all it takes is one pedal stroke to turn a simple ride into an adventure. But electric MTB take it to an even more exhilarating level: pedaling assistance literally transforms the way you ride. Of course, before opting for a particular model, you'll be faced with a host of questions. Which motor? What autonomy? Which frame geometry? Carbon frame or aluminum frame? It's clear that the range is wide, and that the choice is not an insignificant one.
To begin with, it's crucial to assess the overall coherence of the bike: a sturdy frame, a reliable motor and a suitable braking system all form a whole if they are well harmonized. Thinking about frame size, for example, will not only ensure optimum comfort, but also better handling on steep terrain. So it's important to know what you need: are you tackling mountain slopes, are you looking for thrills, are you riding in the forest, or do you just want to go for quiet rides on trails that aren't too technical?
Another point: the terrain itself. An electric MTB designed for technical descents will not necessarily offer the same feel or suspension as a model designed for long trail rides. Hence the idea of targeting the type of riding (occasional, sporty, extreme) from the outset, in order to focus on the really relevant features.
Engine, range, suspension: how do you assess each component?
The motor is undoubtedly the most emblematic part of the electric MTB . You'll mainly find brands like Bosch, Shimano, Yamaha, Brose or Bafang. Each has its own reputation, pedaling feel and, above all, varying motor torque (expressed in Nm). If you love climbing steep hills, a powerful motor torque (over 70 Nm) will be useful to sustain your effort. On the other hand, if the torque is too low, you're likely to be left hungry for more.
Autonomy depends above all on battery capacity (Wh). Batteries of 400 Wh, 500 Wh and even 750 Wh are common on some recent models. The idea is to choose a lithium-ion battery pack suited to the average distance of your outings. There's no point in aiming too low if you plan to regularly ride 60 km or more: it's better to think ahead to avoid a breakdown in the middle of a trail.
When it comes to suspension, everything depends on your riding style. A rear shock absorber and a front fork with good travel (e.g. 120 mm to 160 mm) are often essential on a VTTAE designed for mountain use. On the other hand, for more cross-country use on rolling terrain, less travel may suffice. The important thing is to check the quality of the fork (air or spring), its compression behavior and ease of adjustment (rebound, preload, etc.).
Which type of electric MTB for which use: touring, cross-country, enduro?
- MTB leisure: We often prefer a versatile model, with a mid-mounted motor and decent range, so we can rack up the kilometers by modulating the assistance modes (eco, normal, turbo) according to fatigue and gradient.
- Cross-country (XC): Here, weight is everything. We're looking for good stiffness to climb efficiently, and we're paying attention to the power-to-weight ratio to maintain good performance. 29" wheels are generally appreciated for their ability to overcome obstacles.
- Enduro: The focus here is on downhill riding, handling and solidity. You want longer travel, a sturdy frame (often aluminum or carbon), very powerful brakes (hydraulic disc brakes), and an engine with enough torque to get you to the top faster.
Each use has its own specificities, its own riding style and, above all, its own level of demands. Take the time to ask yourself what your main objective is: a cushy ride or a big one on the singletrack?
What's the right budget for an electric MTB ?
Let's face it: an electric-assist MTB is an investment. Before diving in, you need to determine your budget and find the right balance between performance and price. The differences are considerable: from entry-level models costing less than €2,000, to top-of-the-range MTB flirting with €5,000 and (well) more.
The right price range for every application
Entry-level (up to €2,000)
This is often where you'll find decent configurations for beginners. The motors are sometimes less powerful or less reputable (wheel motors or mid-motors of average quality). Batteries don't always exceed 400 Wh, and suspension quality can be modest. Despite this, there are some very pleasant surprises to be found if you compare carefully.
Mid-range (around €2,000 to €3,500)
In this range, we can already access more reputable motors such as Bosch Performance Line or Shimano Steps, 500 Wh batteries, and well-finished frames. The equipment is of better quality: hydraulic brakes, a slightly higher-end transmission, etc. Ideal for regular use and high standards. There's every reason to opt for this range if you plan to be out and about on a regular basis.
High-end (€3,500 and up)
These electric MTB take performance to a whole new level. We're talking carbon frames, high-performance motors like Bosch Performance CX or Shimano EP8, batteries of up to 750 Wh and premium components (top-of-the-range Fox or RockShox forks, 4-piston brakes, Shimano XT or SRAM GX derailleurs, FOX RACING SHOX telescopic seatpost, etc.). A dream come true for lovers of fine equipment, who want to get the most out of their bikes, both uphill and downhill.
To keep the bill down, keep an eye out for sales, discontinued or refurbished products (😉 ). Specialized sites sometimes offer interesting discounts, especially when a new MTB vintage is about to be released.
How do you choose the right frame size?
First, you need to take into account your morphology (inseam length, height) and refer to the brand's recommendations (often presented in the form of tables). On an electric MTB , the inseam height should allow you to remain comfortable when you put one foot on the ground, while ensuring optimal posture when pedaling. If you're between sizes, a smaller frame will enhance maneuverability and the bike's "playful" side, while a larger size may improve stability, especially on descents. Ideally, if possible, test two different sizes to see which gives you the best comfort and control on uneven terrain.
new or used electric MTB : advantages and disadvantages
new brings the manufacturer's warranty, the satisfaction of riding a bike out of the box, and the assurance that parts have never been abused. Brands like Moustache Bikes, Specialized and Trek often offer extended frame and even battery warranties.
Buying second-hand, on the other hand, brings the price down and can help you find a bargain, but requires greater vigilance. The state of the battery is often the most critical point: if the battery is already well worn, you run the risk of limited autonomy. The motor must also be in good condition, with no suspicious noises or abnormal play. Don't hesitate to ask for a test ride, check the original purchase invoice and ask questions about the bike's history (maintenance, repairs, any shocks).
There is a compromise: the refurbished. Professionals check every component (motor, battery, transmission), replace if necessary, and offer you a bike with a warranty. It's a way of riding a brand-name model at a more reasonable price, with a little more security than a classic second-hand purchase. At Upway , for example, bikes are thoroughly inspected (20 checkpoints) before being released for sale.
Key components of an electric MTB and their impact on performance
When choosing a VTTAE, it's essential to pay attention to the smallest technical details. We're not just talking about a "bike with a motor", but a complex machine that has to withstand high stresses (torque, vibrations, shocks) while remaining pleasant to ride.
Battery life and maintenance
The battery is the energy source of your electric assist. Generally made of lithium-ion, its capacity (Wh) largely determines its range. A 500 Wh battery can give you a range of between 50 and 100 km, depending on the assistance mode, the gradient and your pedaling style.
Life expectancy is often around 500 to 1,000 full charge cycles. With regular use, this represents several years. Maintenance remains simple: avoid storing it completely discharged, prefer a dry, temperate room, and don't expose it to extreme temperatures.
If your battery is showing signs of weakness (range dropping drastically, recharging taking longer than usual), ask about a possible replacement. Some brands offer batteries compatible with several generations of motors, which can ease the transition.
Transmission and assistance: single chainring, derailleur, assistance modes
The transmission influences the smoothness of your gear changes. Recent electric MTB often opt for a single chainring (a single sprocket at the front) combined with a 10, 11 or even 12-speed cassette. This system simplifies gear handling and makes the bike lighter.
Assistance modes (eco, tour, sport, turbo, etc.) let you adjust engine support. In eco mode, you save energy and enjoy good range, while turbo mode propels you vigorously up steep sections (but wears out the battery faster).
On the derailleur side, Shimano Deore, SLX and SRAM NX and GX are reliable for most applications. The higher up the range you go, the greater the precision, lightness and durability.
Suspension: semi-rigid or fully suspended?
The choice between a semi-rigid and a full-suspension frame is a major one. A semi-rigid frame has no rear shock absorber. The result is a bike that's lighter, easier to maintain and generally less expensive. It's a popular choice for cross-country riding. To find out more, take a look at our semi-rigid MTB collection.
A full-suspension bike, on the other hand, features a rear suspension and a more sophisticated fork. The result: greater comfort, better grip on uneven terrain and a real advantage when descending or enduroing. On the other hand, the budget climbs and maintenance can be a little more complex. For this type of riding, take a look at our full-suspension MTB collection.
Braking: mechanical or hydraulic discs?
An electric MTB means potentially higher speeds. Brakes are therefore an essential safety feature. Two main options:
- Mechanical disc brakes: cable-actuated, less expensive, but require more lever effort and can lose effectiveness on long descents.
- Hydraulic disc brakes: filled with fluid, they provide superior braking power and more precise modulation. They're a must-have on a mid-range/high-end electric MTB , especially if you're riding in the mountains or on sporty outings.
Also check the size of the discs: 180 mm or even 200 mm at the front can be interesting for dissipating heat and guaranteeing optimal braking.
Wheel size and tires type: what influence on driving?
The choice of wheels plays a key role in the handling and stability of your electric MTB :
27.5": Better handling, ideal for tight turns and technical terrain.
29" : Renowned for its climbing ability and high-speed stability, perfect for cross-country or long-distance riding.
Mullet assembly (29" front / 27.5" rear) : This compromise is becoming increasingly popular with enduro and downhill riders. A 29" front wheel size ensures better absorption of obstacles and greater stability, while the 27.5" rear wheel improves handling and makes the bike more playful, especially in tight turns and relaunches.
tires width also plays a key role. Wider tires (2.6", 2.8" or even 3.0") offer greater grip and comfort, especially on rough terrain. Last but not least, the tubeless system is becoming increasingly popular with mountain bikers, as it reduces the risk of punctures and allows riding at lower pressures for better traction.
Where to buy an electric MTB and what to look out for
You can buy an electric MTB in a specialist store, on a retail website or via a second-hand platform. Each channel has its strengths and limitations:
- Specialist store
Advantages: personalized advice, test rides, responsive after-sales service.
Disadvantages: sometimes less choice than online, sometimes higher prices. - Online sites
Advantages : large catalog, regular promotions, home delivery.
Disadvantages: no trial before purchase, sometimes complicated returns, remote after-sales service. - Second-hand platforms
Advantages: attractive prices, varied choice (old models, rare collections, etc.).
Disadvantages: need to check the condition of the bike, more precautions to take to avoid scams (invoice, history, maintenance). - Refurbished bikes
Advantages : A good compromise between new and used. Reconditioned by professionals, these bikes are checked and reconditioned to guarantee optimum performance. They are generally offered with a warranty, offering greater peace of mind than a classic second-hand purchase. It's the ideal option for enjoying a brand-name model at a discounted price, with the assurance of a reliable, ready-to-ride bike. In fact, for those looking for a refurbished electric MTB with a guarantee and rigorous quality control, we know of a platform that's well worth a visit 😉
Disadvantages: Slightly higher cost than classic second-hand, but justified by the warranty and technical checks carried out before sale.
Before you buy, make a small checklist:
- Test ride on road or trail ( Upway gives you 14 days to try and change your mind if the bike doesn't suit you).
- Battery check (runtime, charge cycles, date of manufacture).
- Check wear partstires, brakes, chain, cassette).
- Check frame for cracks and impacts.
- Confirmation of correct operation of motor and control screen (assistance modes operational?).