Best 40 MPH E-Bikes 2026: Which Ones Can Really Hold 40 MPH

A 40 mph e-bike should be judged by more than its claimed top speed. At these speeds, high-speed stability, braking, climbing performance, and overall control matter just as much as the number on the display.

For long-range riding with high-speed stability, the Aniioki A8 Ultra stands out. The Motor Goat V3 offers a strong overall high-speed package, while the DTTZH F6S is the better choice for a tighter budget. Based on real-world test data and in-depth comparisons, this guide helps you choose the 40+ mph e-bike that best fits your riding needs.

Quick Picks: Best 40 MPH Electric Bikes 2026

Top E-Bikes That Go 40 MPH: Full Specification

DTTZH F6S

$879 | VIEW OFFER

Why It Makes This List

If you're shopping for a 40 mph electric bike on a tighter budget, the DTTZH F6S is worth considering. At $879, it comes in well below every other bike in this lineup, while still offering a top speed of up to 40 mph (64 km/h).

Its 48V 25Ah battery provides 1,200Wh of capacity. That's the smallest battery in this group by a clear margin, especially compared with the Aniioki A8 Ultra's 4,200–4,800Wh, the Hikeep MAS's 2,400Wh, and the BIGNIU BG-S Pro's 1,920Wh.

That doesn't automatically make the F6S the shortest-range option, though. The bike weighs just 75 lb (34 kg), which is the lightest in this lineup. With less weight to move, its claimed range reaches 35 miles (56 km) on throttle or up to 80 miles (129 km) with PAS, depending on riding conditions.

The motor is rated at 1,000W with a 2,000W peak output and 80Nm of maximum torque. That's the lowest torque figure among these six bikes, so the F6S isn't the choice to make if steep climbing is a major priority. On moderate grades below roughly 20%, it can climb with a noticeable reduction in speed and increased motor load. Once grades move beyond about 25%, expect a more obvious drop in speed and greater demand on the motor and controller.

For everyday riding, the full suspension and 20 × 4.0-inch fat tires give the F6S a practical setup for paved roads, rough pavement, hills, and light off-road riding. It isn't built around extreme off-road use, but it covers the types of surfaces most buyers are likely to encounter without adding the weight and cost of a much larger battery or drivetrain.

Real-World Riding Experience

After unlocking the speed limit, the display shows a theoretical maximum speed of 40.5 mph (65 km/h). In a real-world test with a 230-lb (104-kg) rider, the bike reached around 31–32 mph (50–51 km/h) on flat ground using throttle only.

At around 25–30 mph (40–48 km/h), the bike is more practical for regular riding. At 30 mph (48 km/h), the pedals can still provide a small amount of resistance feedback. As speed increases, wind resistance rises quickly, so the 1,200Wh battery will not provide anything close to its maximum advertised range when the bike is ridden aggressively for extended periods.

Climbing performance is more limited when relying on the throttle alone. On a slope, the speed dropped to around 8 mph (13 km/h) in the same test. Adding pedal input increased the speed and allowed it to stay above 12 mph (19 km/h), showing that rider input makes a noticeable difference when the motor is working against a climb.

Best For

The F6S is best suited to buyers who want to spend less than $1,000 but still want access to 40 mph (64 km/h) performance.

It's also a sensible option if weight matters. At 75 lb (34 kg), it is the easiest bike in this lineup to handle physically, while its 80-mile (129 km) PAS range gives it more usable range than the battery size alone might suggest.

For riders who mainly deal with paved roads, moderate hills, rough pavement, and occasional light off-road sections, the F6S provides a straightforward balance of speed, weight, and price.

Drawbacks

The biggest limitation is the 1,200Wh battery. It's considerably smaller than the batteries used by the A8 Ultra, Hikeep MAS, and BG-S Pro, so riders who regularly travel long distances or spend a lot of time at higher speeds will have less energy in reserve.

The 80Nm torque is another limitation. It is adequate for moderate hills, but steeper climbs require lower speeds and put more load on the motor. Riders frequently dealing with steep grades or demanding off-road terrain would have more headroom with a higher-torque model.

The F6S also gives up some high-speed hardware and overall power compared with the more expensive bikes in this lineup. Its appeal is therefore less about having the strongest specifications and more about getting a 40 mph (64 km/h) capable e-bike at a much lower price and with significantly less weight.

Aniioki A8 Ultra

$2,499 | VIEW OFFER

Why It Makes This List

The Aniioki A8 Ultra is the newest model added to Aniioki's lineup in the second half of 2026, and it takes the A8 series further into the high-performance category. With a top speed of up to 46 mph (74 km/h), it is one of the fastest bikes in this lineup while keeping its price at $2,499.

Among the performance-focused A8 models, the A8 Ultra is also the strongest value option. The updated wheel structure is one of its most noticeable changes. Its integrated hub wheel design provides a more rigid wheel structure for climbing and for dealing with uneven surfaces such as loose gravel, bumps, and rough trails. At higher speeds, that added rigidity also helps give the bike a more stable feel.

The battery is another area where the A8 Ultra separates itself from the rest of this list. The 60V 70Ah configuration stores 4,200Wh, with an 80Ah version reaching 4,800Wh. That's the largest battery capacity in this comparison, giving the A8 Ultra considerably more energy in reserve than the other models here. The Grade-A LiFePO4 blade battery is also designed for a longer cycle life than the lithium-ion batteries used by most of the other bikes in this lineup, making it particularly relevant for riders planning to keep the bike for years.

With that battery capacity, the range reaches 70–80 miles (113–129 km) on throttle and 120–210 miles (193–338 km) with PAS. Those figures are especially relevant if your rides regularly cover long distances or charging opportunities are limited. For riders who simply don't want to think about charging after every few rides, the extra battery capacity provides a useful buffer.

The motor is rated at 3,500W with a 4,000W peak output and 130–140Nm of torque. The higher peak power gives the A8 Ultra more output headroom at higher motor speeds, making it better suited to sustained high-speed riding and continued acceleration. Compared with the Motor Goat V3's lower 3,000W peak output, the A8 Ultra is more focused on maintaining strong power as speed builds rather than relying primarily on low-speed torque.

Real-World Riding Experience

The A8 Ultra makes the most sense when the riding involves both speed and distance. GPS testing recorded a top speed of 46.5 mph (75 km/h). Within the commonly used 20–40 mph (32–64 km/h) acceleration range, the power response is very direct and remains consistent. Once the bike reaches around 40 mph (64 km/h), the motor moves into its higher-power range but still retains some acceleration headroom, continuing to pull up to around 45–46.5 mph (72–75 km/h).

The suspension setup also supports this kind of riding. A hydraulic front fork, adjustable rear shock, and adjustable seat give riders some room to adapt the bike to different road surfaces and riding positions. Combined with the 20 × 4.0-inch puncture-resistant fat tires, the setup works across paved roads, hills, gravel, grass, sand, and lighter trail use.

The motor's climbing performance is another noticeable strength. In tests on 25°–45° slopes, the A8 Ultra maintained strong pulling power under load. During long, steep climbs or sustained uphill riding with heavier loads, speed typically dropped by only around 3–5 mph (5–8 km/h), and adding throttle partway through a climb still produced a noticeable surge of acceleration. The motor did not show the same obvious power softening seen on the older Aniioki 52V models.

Power delivery also remained relatively consistent as the battery level dropped. Even below 50% charge and into the later portion of the battery, the motor continued to provide stable output, with flat-ground top speed still around 42–44 mph (68–71 km/h) and no obvious drop in acceleration response or climbing performance. At 40–46 mph (64–74 km/h), the bike also maintained a planted feel during straight-line cruising, without noticeable frame wobble or abnormal shaking.

The battery is what really changes the ownership experience, though. Under heavy-use testing with full throttle and sustained 35–45 mph (56–72 km/h) riding, the A8 Ultra still achieved more than 70–75 miles (113–121+ km) of throttle-only range. That makes the 4,200Wh battery particularly valuable for riders who regularly combine high speeds with long-distance riding, where smaller battery packs would require much more frequent charging.

Best For

The A8 Ultra is best suited to riders who want a high-speed e-bike without giving up long-distance capability.

It makes particular sense for long-distance riders, touring use, and anyone who doesn't always have convenient access to a charger.

It's also a strong choice if high-speed performance matters. The 4,000W peak motor output gives the A8 Ultra more high-speed power headroom than the Motor Goat V3, while its updated wheel structure adds another layer of stability for faster riding and rougher surfaces.

Drawbacks

The A8 Ultra's biggest trade-off is that its large battery and high-performance equipment make it a substantially larger bike than a lightweight commuter-oriented e-bike. Riders who frequently need to lift or transport their bike should take that into account.

Motor Goat V3

$2,399.20 | VIEW OFFER

Why It Makes This List

The Motor Goat V3 is one of the two bikes in this lineup I would pay particular attention to if maintaining a genuine 40 mph (64 km/h) riding speed is the priority. Its claimed top speed reaches 48 mph (77 km/h), giving it substantially more speed headroom than a bike designed to top out at 40 mph (64 km/h).

That extra headroom matters in real riding. Rider weight, hills, wind, road surface, tire pressure, and battery level can all reduce actual speed. A bike that can reach 46–48 mph (74–77 km/h) on paper therefore gives more room to maintain a target speed around 40 mph (64 km/h) under less-than-ideal conditions. This is why the Motor Goat V3 and Aniioki A8 Ultra stand out as the two models I would recommend most strongly for riders specifically looking for a high-speed 40 mph setup.

The Motor Goat V3 also has a more performance-oriented braking setup than the A8 Ultra. Its 203mm rotors and 4-piston hydraulic calipers provide a larger braking surface and greater heat-management capability, which is useful when repeatedly slowing down from higher speeds.

Its motor produces 2,000W rated power, 3,000W peak power, and 170Nm of torque. The 170Nm figure gives it strong low-speed pulling power for starts, climbs, and rougher terrain. At the same time, its lower peak output means it has less high-speed power headroom than the A8 Ultra's 4,000W peak motor.

The 60V 25Ah battery uses Samsung cells and stores 1,500Wh. That's enough for shorter performance-focused rides, but it is much smaller than the A8 Ultra's 4,200–4,800Wh battery. The claimed range is 37 miles (60 km) on throttle or 56 miles (90 km) with PAS.

Real-World Riding Experience

GPS testing recorded a real-world top speed between 44–50 mph (71–80 km/h), giving the Motor Goat V3 enough speed headroom for riders targeting sustained 40 mph riding.

At higher speeds, the 20 × 4.0-inch fat tires provide a wide contact patch, while the full adjustable front and rear suspension helps the bike deal with uneven pavement and mixed terrain. The INNOVA all-terrain road tires also use a wider 4.5-inch rear tire compared with the 4-inch front. Compared with more heavily treaded off-road tires, this setup provides better grip and a smoother, quieter ride on paved roads, making the Motor Goat V3 more comfortable for high-speed street riding.

The motor also maintains its performance well on climbs. In regular steep-hill testing, speed dropped only slightly, with no obvious power fade or inability to climb the tested slopes. This suits the bike's performance-oriented character, particularly when strong acceleration and climbing response are more important than maximizing range.

The braking hardware becomes more relevant as speed increases. In brake testing, the 203mm 4-piston hydraulic brakes provided reliable stopping power at high speeds with responsive braking input. Repeated high-speed braking generates considerably more heat than normal city riding, so this setup gives the Motor Goat V3 an advantage over the A8 Ultra's 180mm 2-piston brakes in braking hardware and heat management.

Best For

The Motor Goat V3 is best suited to riders who care more about high-speed performance, braking hardware, and strong low-speed torque than maximum range.

Its 48 mph (77 km/h) claimed top speed provides plenty of headroom for a 40 mph (64 km/h) target, while the 170Nm of torque gives it useful pulling power when accelerating from a stop or climbing at lower speeds.

It is also a better fit for riders who regularly ride mixed terrain or off-road and want adjustable suspension rather than a purely road-focused setup.

Drawbacks

The biggest limitation compared with the A8 Ultra is the combination of lower peak power and much smaller battery capacity. Its 3,000W peak output is below the A8 Ultra's 4,000W, so the Motor Goat V3 has less power headroom as speed continues to build.

The 1,500Wh battery is also less than half the capacity of the A8 Ultra's 4,200Wh version. With a claimed throttle range of 37 miles (60 km), riders planning long-distance trips will need to pay much more attention to charging.

The Motor Goat V3 makes more sense if the priority is 48 mph (77 km/h) capability, 170Nm of torque, and stronger high-speed braking hardware. The A8 Ultra is the better fit for riders who want more high-speed power headroom together with substantially greater range.

ENGWE M20 3.0

$1,699 | VIEW OFFER

Why It Makes This List

The ENGWE M20 3.0 takes a more practical approach to the 40 mph (64 km/h) category. Its claimed top speed is up to 40 mph (64 km/h), while the combination of 203mm rotors and 4-piston hydraulic calipers gives it one of the stronger braking setups in this lineup.

Along with the Motor Goat V3, the M20 3.0 stands out for braking hardware and heat management. That's worth considering on a high-speed e-bike, where the braking system needs to deal with more heat during repeated deceleration. The 203mm rotors also provide a larger braking surface than the 180mm rotors used on the A8 Ultra.

One of the M20 3.0's more practical features is the choice between single and dual batteries. A single 60V 20Ah battery provides 1,200Wh, while adding a second battery increases total capacity to 2,400Wh. This gives buyers some flexibility instead of committing to the larger battery setup from the start.

The single-battery version is also the smallest battery in this lineup by total energy, matching the F6S at 1,200Wh. The dual-battery configuration, however, brings the M20 up to 2,400Wh, putting it in the same general capacity range as the Hikeep MAS.

The bike uses a 750W rated motor with 3,300W peak output and 120Nm of torque. That's enough to support its 40 mph (64 km/h) positioning, although it doesn't offer the torque or top-speed headroom of the Motor Goat V3 or A8 Ultra.

Real-World Riding Experience

The M20 3.0 is particularly interesting for mixed-terrain riding. GPS testing recorded a top speed of 38–40 mph (61–64 km/h), while the adjustable front and rear suspension helps smooth out paved roads, rough pavement, and gravel.

Its standard 20 × 4.0-inch puncture-resistant fat tires offer balanced grip on pavement and fine gravel, along with good puncture resistance. The rear also leaves room for an optional 5-inch fat tire if a wider setup is preferred.

The weight becomes more noticeable on steep climbs. During uphill testing, throttle-only speed dropped from 35+ mph (56+ km/h) to around 20–24 mph (32–39 km/h), a reduction of roughly 15 mph (24 km/h).

With the 2,400Wh dual-battery setup, the M20 3.0 is better suited to longer high-speed rides. Under full throttle at a sustained 35–40 mph (56–64 km/h), real-world throttle-only range reached around 40–45 miles (64–72 km).

Best For

The M20 3.0 is best suited to riders who want a 40 mph (64 km/h) e-bike with strong braking hardware and the flexibility to choose how much battery capacity they actually need.

The single-battery version makes more sense for shorter rides and buyers who want to keep the configuration simpler. The dual-battery version is more appropriate for longer rides, with twice the battery capacity and substantially more claimed range.

It's also a good option for riders who expect their riding conditions to change. The adjustable suspension and optional 5-inch rear tire allow the bike to be configured more toward comfort and rough-terrain riding instead of locking the rider into one setup.

Drawbacks

The M20 3.0 doesn't stand out in terms of maximum speed or torque. At up to 40 mph (64 km/h) and 120Nm, it sits below the A8 Ultra and Motor Goat V3 in high-speed headroom and low-speed torque.

The battery choice also requires some thought. With the single-battery configuration, its 1,200Wh capacity is tied with the F6S for the smallest in this comparison. The dual-battery version solves that limitation, but it also means a higher purchase cost and a heavier overall setup.

Hikeep MAS

$1,499.99 | VIEW OFFER

Why It Makes This List

The Hikeep MAS takes a noticeably different approach from the more road-oriented bikes in this lineup. It is built with off-road riding in mind, and its 3,000W rated motor, 4,000W peak output, and 250Nm of torque give it the strongest claimed torque figure among these six bikes.

That 250Nm figure is particularly relevant for riders dealing with steep climbs, loose surfaces, and low-speed off-road sections. Compared with the 80Nm of the F6S and 120Nm of the M20 3.0 and BG-S Pro, the MAS has substantially more low-speed pulling capacity. It isn't simply a high-speed bike with an off-road appearance; its motor setup is much more focused on demanding terrain.

The 60V 40Ah battery stores 2,400Wh, giving the MAS considerably more energy than the smaller-battery models in this comparison. Hikeep claims up to 160 miles (257 km) with Eco assist, although actual range will vary significantly with rider weight, terrain, speed, and how much motor assistance is used.

The suspension is probably the MAS's most noticeable feature once you look at the bike itself. Its 6-point full suspension uses a dirt-bike-style design, giving it more suspension support for uneven terrain than a typical commuter-oriented e-bike. Combined with 20 × 4.0-inch off-road fat tires, the setup is clearly aimed at dirt trails, gravel, grass, sand, and light snow rather than smooth city streets.

At 95.2 lb (43.2 kg), the MAS is also relatively light compared with several of the other high-performance bikes here. That helps keep the bike more manageable when riding at speed over uneven terrain, where changes in direction and surface conditions require more active control.

Real-World Riding Experience

After unlocking the speed limit, GPS testing recorded 38–40 mph (61–64 km/h) on flat ground. More importantly, during the Grass & Dirt Hill Climb test, speed only dropped from 38+ mph (61+ km/h) to around 28–32 mph (45–51 km/h) on steep sections—a loss of roughly 6–10 mph (10–16 km/h).

The 6-point full suspension is especially noticeable off-road. On uneven trails, potholes, and stepped surfaces, the system absorbed impacts extremely well and kept the ride remarkably smooth.

The high torque also shows its value on climbs and loose terrain. Even after the battery dropped below 50%, top speed remained around 35–37 mph (56–60 km/h), with only a slight reduction in power output.

For range, the result is also strong considering the test conditions. Under aggressive full-throttle riding at a sustained 35–40 mph (56–64 km/h), the MAS delivered around 40–50 miles (64–80 km) of real-world throttle-only range.

Best For

The Hikeep MAS is best suited to riders who specifically want an off-road-oriented 40 mph (64 km/h) e-bike rather than a commuter that can occasionally handle a trail.

It makes the most sense for dirt trails, gravel, grass, sand, and other uneven surfaces where the 250Nm torque and 6-point suspension can actually be used. Riders who regularly face steep climbs will also benefit from the motor's strong low-speed pulling capability.

The suspension is another reason to consider it. If comfort over rough terrain is a major priority, the MAS has arguably the most substantial suspension setup in this group.

Drawbacks

The same dirt-bike-style design that makes the MAS well suited to off-road riding can make it a less natural choice for urban commuting. Its appearance is much more aggressive than a conventional city e-bike, so it may attract more attention when ridden on public roads. Depending on local regulations and how the bike is classified, riders should also check the applicable rules before using it on public streets.

BIGNIU BG-S Pro

$1,499 | VIEW OFFER

Why It Makes This List

The BIGNIU BG-S Pro stands out for its 5,000W peak motor power, the highest peak output among the bikes in this comparison. Its 3,000W rated motor provides a strong base for everyday riding, while the higher peak output gives the motor more power available during hard acceleration and demanding riding conditions. This makes the BG-S Pro particularly interesting for riders who want a high-power setup without moving far beyond the $1,500 price range.

The BG-S Pro also takes a more off-road-oriented approach than a typical 40 mph electric bike. Full suspension, an inverted front fork, rear suspension, and 19-inch off-road tires are designed to handle dirt, gravel, rough roads, and trails, while still allowing the bike to be used on paved streets.

Real-World Riding Experience

The BG-S Pro uses a 60V 32Ah battery with 1,920Wh of energy and offers about 29.2 miles (47 km) of throttle-only range. Its 60V system and high peak power output perform well on regular dirt slopes, off-road climbs, and even uphill sections such as overpasses.

On steep slopes, GPS testing showed speed dropping from 40+ mph (64+ km/h) on flat ground to around 25–30 mph (40–48 km/h), a reduction of roughly 10–15 mph (16–24 km/h). The bike continued climbing without cutting out or becoming unable to move.

At around 50% battery, the BG-S Pro could still maintain 38–40 mph (61–64 km/h) at higher speeds. Once the battery dropped further to around 20–30%, top speed fell to approximately 32–35 mph (51–56 km/h).

The BG-S Pro's full-suspension setup helps absorb impacts on rough surfaces, while the 19-inch off-road tires are suited to loose and uneven terrain. Its 5,000W peak output gives it an advantage in power delivery over the Hikeep MAS, although the MAS's much higher 250Nm torque remains the stronger setup for steep, low-speed climbs.

Best For

The BG-S Pro is best for riders who prioritize peak motor power, acceleration, and mixed-terrain capability. It makes particular sense for someone who wants a 40+ mph electric bike with a 5,000W peak motor and an off-road suspension setup at $1,499.

For riders who frequently encounter steep climbs, the Hikeep MAS is the stronger choice because its 250Nm torque provides substantially more low-speed pulling power. The BG-S Pro is better positioned around peak output and high-power riding rather than maximum climbing performance.

Drawbacks

The BG-S Pro's main weaknesses are its torque, battery capacity, range, and weight compared with the Hikeep MAS. Its 1,920Wh battery stores less energy than the MAS's 2,400Wh battery, while the 29.2-mile (47 km) throttle-only range leaves less room for extended rides without recharging.

The 120Nm torque also limits its advantage on steep terrain. Although the 5,000W peak rating is higher than the MAS's 4,000W, peak power and torque serve different purposes, so the higher wattage does not make the BG-S Pro the stronger climber.

Conclusion

The best 40 mph e-bike depends on what matters most in real riding. The Aniioki A8 Ultra stands out for long-range performance and high-speed stability, while the Motor Goat V3 offers a more performance-focused package with strong braking and torque. For buyers on a tighter budget, the DTTZH F6S delivers 40 mph capability at a much lower price and with significantly less weight.

FAQ

Is 40 mph fast for an e-bike?

Yes. A 40 mph (64 km/h) e-bike is significantly faster than a typical Class 1-3 e-bike. At this speed, braking, tire grip, suspension, and frame stability become much more important. For example, the Aniioki A8 Ultra reached 46.5 mph (75 km/h) in GPS testing, providing useful speed headroom for sustained 40 mph riding.

What happens if you get caught on an electric bike?

The consequences depend on local laws and how the e-bike is classified. A bike capable of 40 mph (64 km/h) may exceed standard e-bike speed limits in some areas. Before riding on public roads, check local rules for speed limits, registration, licensing, and where high-speed e-bikes are permitted.

Which is better for an e-bike, 48V or 52V?

A 52V system generally provides higher voltage headroom than 48V, which can benefit acceleration and performance at higher speeds when the motor and controller support it. However, voltage alone does not determine performance. Motor power, controller limits, battery capacity, rider weight, and terrain also affect real-world speed.

Can I put a 52V battery on a 48V e-bike?

Not necessarily. A 52V battery should only be used when the motor, controller, display, BMS, and charger are designed to support that voltage. Installing a higher-voltage battery on a 48V system can cause component damage or unsafe operation, so compatibility should be confirmed before making the change.

Can I leave my e-bike on charge overnight?

It is generally better not to leave an e-bike charging unattended overnight. A lithium-ion battery can remain connected after reaching full charge, but charging should be done with the manufacturer's approved charger in a dry, ventilated area. For regular use, unplugging after the battery reaches full charge reduces unnecessary charging time.

Does pedaling an e-bike charge the battery?

Normally, no. Most e-bikes do not recharge their batteries simply because the rider pedals. Pedaling provides additional power to the bike but does not normally send meaningful energy back into the battery. Regenerative braking can recover some energy on compatible systems, but conventional hub-motor e-bikes generally do not have this feature.

Do e-bike batteries drain when not in use?

Yes, but normally only slowly. An e-bike battery can lose some charge through natural self-discharge and the bike's standby electronics. If an e-bike will sit unused for weeks or months, storing the battery at a moderate charge level and checking it periodically can help prevent excessive discharge.

Is it safe to store my e-bike battery in the house?

Yes, if the battery is in good condition and stored correctly. Keep it in a cool, dry location away from heaters, direct sunlight, and flammable materials. Avoid storing a damaged or swollen battery indoors. For long-term storage, following the battery manufacturer's recommended charge level and temperature range helps reduce degradation.

Are electric bikes hard to pedal?

Most e-bikes are not difficult to pedal because the motor supplies assistance while riding. However, a high-performance 40 mph e-bike can be heavy. For example, the DTTZH F6S weighs 75 lb (34 kg), while heavier models can exceed 90 lb, making them noticeably harder to pedal or move without motor assistance.