All Terrain Electric Bikes
Three genuinely different bikes get sold under the same two words. Working out which one you need starts with the surface under your wheels, not the badge on the frame.
On this page
"All terrain" is a phrase that survives because it sells, not because it describes anything. Put it in a product title and it covers a rigid fat tyre cruiser, a trail-geometry hardtail with a 120 mm fork, and a 150 mm full suspension bike costing five times as much. Those three machines share a category name and almost nothing else.
Buying well means ignoring the label and answering a narrower question: what is under your wheels for most of the miles you ride? Sand and snow want one thing. Rooty singletrack wants another. Fire roads and gravel want a third. A bike optimised for any one of those is compromised on the others, and no amount of marketing changes that.
What follows is the three types, what each is genuinely good at, the single setup change that makes more difference than any of them, and the surfaces where none of them work.
What the label hides
The reason three different bikes end up under one name is that "terrain" is not one variable. There are at least three that matter independently, and a bike can be excellent at one while being poor at the others.
Softness. Sand, snow, deep loam and loose gravel are surfaces that give way under load. Handling them is about flotation, which means contact patch area, which means tyre width and low pressure. Suspension does almost nothing for softness.
Roughness. Roots, rocks, ruts and drops are surfaces that stay put but are violently uneven. Handling them is about suspension, geometry and braking, not tyre width. A 4 inch tyre at low pressure absorbs a little of it, and then the frame and your wrists absorb the rest.
Steepness. Gradient, up and down, is about torque delivery, gearing, brake capacity, and where your weight sits over the wheels. This is where mid-drive versus hub motor actually matters, because a mid-drive uses the bike's gears and a hub motor does not.
Once you separate those, the three types sort themselves. Fat tyre cruisers optimise softness. Hardtails balance roughness and steepness at moderate cost. Full suspension bikes maximise roughness. Nothing optimises all three, because tyre width fights weight, and weight fights everything.
Type A: fat tyre cruisers
The defining feature is a tyre around 4 inches wide on a rim to match, usually on a 20 or 26 inch wheel. Suspension is either absent or a basic coil fork with limited travel and no meaningful damping. Geometry is upright and relaxed, closer to a beach cruiser than a mountain bike. Most run a rear hub motor and a throttle, so they are typically Class 2.
What that tyre buys you is flotation. A 4 inch tyre at 8 psi has a contact patch several times the area of a 2.4 inch trail tyre, which spreads the bike's weight enough that it rides on top of sand or packed snow rather than ploughing a furrow through it. Nothing else does this. It is why fat bikes exist at all, and why they are genuinely the right tool for a beach, a snowmobile trail, or a soft forestry track.
The costs are consistent. Weight is the first: 4 inch tyres, wide rims, a wide fork and a wide rear end add up, and these bikes routinely land at 65 to 75 lb. Rolling resistance is the second: on tarmac a fat tyre is noticeably draggy, especially at the low pressures that make it good elsewhere, so range on road suffers. Handling is the third: the wide tyre produces a self-steering effect on cambers, where the bike wants to wander off the crown of the road, and it takes getting used to.
They are also poor on genuinely rough ground. A big soft tyre takes the edge off small hits and does nothing at all for a two foot drop, and a rigid or nominally-sprung fork on a 70 lb bike is not a suspension system. If your riding is rough rather than soft, this is the wrong type. Our fat tyre electric bike guide covers the category in depth, and hunting ebikes covers the load-carrying variants built on the same platform.
Type B: hardtail electric mountain bikes
A suspension fork with real travel and real damping, a rigid rear end, mountain bike geometry, and tyres somewhere between 2.4 and 3.0 inches on 27.5 or 29 inch wheels. Usually a mid-drive motor, usually Class 1, usually with proper gearing.
This is the most useful all-rounder in the category and it is not close. The fork handles the roughness that defeats a cruiser. The narrower tyre rolls efficiently on hardpack and tarmac, so the bike is still pleasant on the road sections between trails. The mid-drive uses the cassette, which means it climbs steep, loose gradients where a hub motor bogs down. The rigid rear end keeps weight and complexity low and means there are no pivot bearings to service.
The wheel size question is worth a moment: 29 inch wheels roll over obstacles better and carry speed, 27.5 inch wheels accelerate faster and are easier to move around on tight trails, and plenty of bikes mix them. Our wheel size guide goes through it. For an all-round trail bike, 29 inch is the safer default unless you are short, in which case 27.5 usually fits better.
Where a hardtail falls short is soft ground and sustained rough descending. A 2.6 inch tyre at low pressure copes with firm sand and does not float on dry beach sand. And on a long, chattery descent the rigid rear end beats you up and, more importantly, lets the rear wheel skip, which costs you braking traction exactly when you want it. Our eMTB guide has more on how the categories are drawn.
Type C: full suspension electric mountain bikes
Suspension at both ends, typically 140 to 160 mm of travel, slack geometry designed for descending, four-piston brakes with large rotors, and a mid-drive motor with a substantial battery. The most capable machines in this article and the most expensive by a wide margin.
What rear suspension actually buys is traction rather than comfort. On rough ground the rear wheel of a hardtail spends a meaningful fraction of the time in the air, and a wheel in the air is a wheel that is neither driving nor braking. A rear shock keeps it on the ground, which means you can brake later, corner harder, and put power down on loose climbs without spinning up. The comfort is a side effect.
The costs are money, weight and maintenance. Pivot bearings wear, shocks need servicing at intervals, and the extra hardware adds several pounds on top of a bike that already has a motor and a battery. There is also a subtler cost: full suspension bikes are optimised for descending, so their long, slack geometry is less pleasant on a flat gravel path than a hardtail's. Buying one for fire roads is spending a lot to be slightly worse at the thing you do. Our suspension guide covers what travel figures and damping adjustments actually do.
Full suspension is worth it if
- Your regular trails have roots, rocks or sustained rough descents
- You ride fast enough that rear wheel skip is costing you control
- You already know what you want from a suspension setup
- Budget allows for periodic shock and bearing service
A hardtail is the better buy if
- Most of your miles are gravel, fire road or smooth singletrack
- You want the lowest maintenance burden
- You want the money in the motor and battery instead
- You are buying your first off-road bike and are still learning what you like
The three types compared
| Surface or trait | Fat tyre cruiser | Hardtail eMTB | Full suspension eMTB |
|---|---|---|---|
| Dry sand | Best available | Poor | Poor |
| Packed snow | Best available | Fair | Fair |
| Gravel and fire road | Fair | Excellent | Good |
| Smooth singletrack | Poor | Excellent | Excellent |
| Rocky, rooty descents | Poor | Fair | Excellent |
| Tarmac efficiency | Poor | Good | Fair |
| Typical weight | 65 to 75 lb | 50 to 60 lb | 52 to 62 lb |
| Typical price | $1,000 to $2,000 | $2,500 to $5,000 | $5,000 and up |
| Maintenance burden | Low | Low | Higher |
Swipe sideways to see all columns →
The row that decides most purchases is the first two against the fourth and fifth. If sand and snow appear in your riding regularly, nothing else substitutes for a fat tyre. If they do not, a fat bike is paying weight and drag for a capability you will not use.
Bikes worth shortlisting
One bike per approach, plus a budget entry. Prices move constantly, so every figure here is an approximate band rather than a quote.
Aventon Aventure.2
- 4 inch tyres on 26 inch wheels
- Suspension fork with lockout
- Class 2 with Class 3 unlock
- Torque sensor rather than cadence only
The most complete example of the fat tyre approach at a sensible price. The torque sensor is the part worth noting: it meters assistance to how hard you are pedalling rather than simply detecting that the cranks are turning, which makes the bike far more controllable on loose surfaces where a sudden burst of power breaks traction. Still a heavy bike, still draggy on tarmac, still the right answer if you ride soft ground.
Lectric XPeak
- Wide off-road tyres on 26 inch wheels
- Front suspension fork
- Class 2 with a throttle
- Hydraulic disc brakes at the price point
Lectric's approach is to put the money where it changes the ride and accept a heavier, less refined result elsewhere. Hydraulic brakes at this price are the notable inclusion, because stopping a heavy bike on a loose descent is where cheap bikes are usually most alarming. Treat it as a capable fire road and light trail bike rather than a mountain bike.
Trek Powerfly 4
- Mid-drive motor using the bike gears
- Trail geometry with a damped suspension fork
- Class 1 pedal assist
- Dealer network and long-term parts support
The type most riders should buy and the one they most often skip. A mid-drive with proper gearing climbs loose, steep ground in a way a hub motor cannot, the fork handles real roughness, and the narrower tyre means the bike is still enjoyable getting to the trailhead. The dealer channel costs more than direct-to-consumer and buys you someone to service the motor, which matters over a decade.
Specialized Turbo Levo
- Full suspension with substantial travel
- Mid-drive motor with a large battery
- Four-piston brakes with large rotors
- Class 1, built around technical descending
The benchmark for what a full suspension eMTB does, and priced accordingly. Worth it if your trails are genuinely technical and you ride them often. Not worth it for gravel paths, where you would be carrying suspension you never use and geometry that makes the bike less pleasant at moderate speed. Read our off-road ebike guide before committing at this level.
Tyre pressure changes more than the bike does
If you take one practical thing from this article, take this. Tyre pressure is the largest single lever you have over how a bike behaves on soft ground, it is free, and the overwhelming majority of fat bike owners get it wrong in the same direction.
The mechanism is simple. A tyre's contact patch area is roughly the load divided by the pressure. Halve the pressure and you roughly double the contact patch, which halves the pressure the ground experiences, which is the difference between floating on sand and sinking into it. Tyre width sets the shape of that patch, but pressure sets the size, and pressure is the variable you can change in ninety seconds at the trailhead.
What that means in numbers. On dry sand or fresh snow, a 4 inch tyre wants to be somewhere around 8 to 10 psi, and experienced fat bike riders often go lower on the softest ground. On hardpack, gravel, or tarmac the same tyre wants 15 to 20 psi so it does not squirm in corners or feel dead. A 2.6 inch trail tyre runs much higher, typically 18 to 25 psi depending on rider weight and whether it is tubeless.
Most owners run their fat tyres somewhere between 25 and 30 psi, because that is close to the number printed on the sidewall and it feels efficient on the road home. At that pressure the tyre is barely deforming, the contact patch is small, and the bike is doing an expensive impression of a bike with normal tyres. If your fat bike feels harsh and slides on loose corners, it is almost certainly this rather than anything wrong with the bike.
The honest limits
Deep, dry, soft sand
No bicycle is good in it. A fat bike at low pressure is the least bad option and will get you along a firm beach at the tideline, over dry dune sand it will still bog down, and the moment you have to steer or accelerate the front wheel digs and stops. Sand rewards momentum and punishes anything that interrupts it, and a heavy bike with a throttle is very good at breaking traction and interrupting it. Ride the damp sand near the water, keep the speed steady, and avoid sharp steering inputs.
Mud
The surface that defeats everything, and fat tyres worst of all. Wet clay packs into the tread until the tyre is a smooth cylinder with no edges, and then it also packs into the frame clearances until the wheel stops turning. Wider tread means more surface to pack. A narrow tyre with tall, widely-spaced knobs sheds mud far better, which is why mud-specific mountain bike tyres are narrow and spiky rather than wide.
There is no setup that fixes it, only tyre choice that makes it less bad and route choice that avoids it. There is also a trail etiquette dimension: riding wet trails on a heavy powered bike carves ruts that persist for a season, and it is one of the fastest ways for a local trail system to end up closed to ebikes.
Ice
Fat tyres do not help on ice. Flotation solves soft ground, and ice is hard ground with no friction. What helps is studs, and studded fat bike tyres exist and work extremely well. If you plan to ride through a real winter, read winter ebike riding before you buy anything, because cold also hits battery capacity hard.
Range under load
Every quoted range figure in this category comes from tarmac. Soft ground, low tyre pressure, climbing, and a heavy bike combine to cut real range dramatically, and a bike claiming 45 miles may deliver 15 to 20 on soft trail with a rider using high assist. Plan around the low number, not the box number, and remember that running out of battery on a heavy fat bike miles from the trailhead is a long walk.
Deciding
Work backwards from the surface you ride most often, not the surface you imagine yourself riding once a year. If sand or snow is in that list, buy a fat tyre bike and accept the weight. If it is gravel, fire road and singletrack, buy a hardtail and put the money you saved into a torque sensor and decent brakes. If your local trails are rough and steep and you ride them weekly, full suspension is not an indulgence.
Then set your pressures properly, because the rider who buys the right bike and runs it at 30 psi is worse off than the rider who buys the wrong one and runs it at 9. Next reads: fat tyre electric bikes for the soft-ground option, electric mountain bikes for the trail option, and ebike suspension before you spend money on travel you may not need.