Highlights based on this e-bike’s specs, comparisons and practical strengths.
100
Excellent braking confidence
Hydraulic disc brakes should provide strong and controlled stopping power.
Hydraulic disc brakes should provide strong and controlled stopping power.
The brake specification mentions four-piston brakes, which should improve stopping power and control.
The brake specification appears to include larger rotors, which can help braking power and heat management.
100
Excellent battery capacity
Battery capacity is high compared with similar e-bikes.
Battery capacity is high compared with similar e-bikes.
The listed battery capacity is large in absolute terms.
97
Excellent removable battery practicality
The removable battery makes charging, storage and battery handling more flexible.
The removable battery makes charging, storage and battery handling more flexible.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
Because the bike is heavier than average, removing the battery can make handling and charging more convenient.
The larger battery capacity makes removable charging more useful for day-to-day convenience.
The longer charging time makes it more useful to charge the battery separately from the bike.
89
Excellent off-road capability
The mountain bike design should be well suited to off-road riding.
The mountain bike design should be well suited to off-road riding.
Front suspension should help absorb bumps on rougher surfaces.
Hydraulic disc brakes should help with control on loose or uneven terrain.
Torque is strong compared with similar e-bikes, which should help on loose or uneven climbs.
The 29-inch wheel size should help rollover and stability on rougher terrain.
88
Excellent rider information and controls
The included display or control unit should give useful ride information and control.
The included display or control unit should give useful ride information and control.
Multiple ride modes should give the rider more control over assistance levels.
Torque and cadence sensing should improve how precisely the bike responds to rider input.
87
Excellent smooth power delivery
Torque and cadence sensing should help the motor deliver more natural and controlled assistance.
Torque and cadence sensing should help the motor deliver more natural and controlled assistance.
Multiple ride modes should help riders choose a smoother level of assistance.
The included display or control unit should make it easier to manage assistance levels.
85
Excellent for longer rides
Range is high compared with similar e-bikes, which is one of the strongest signs it should suit longer rides.
Range is high compared with similar e-bikes, which is one of the strongest signs it should suit longer rides.
Battery capacity is strong compared with similar e-bikes.
Battery efficiency appears broadly average.
The removable battery can make charging easier during longer days or multi-stop rides.
Charging time is longer than average, which may be less convenient for back-to-back longer rides.
The display or control unit should make it easier to monitor assistance and battery use on longer rides.
85
Excellent technical trail control
The mountain bike design is well suited to technical trail control.
The mountain bike design is well suited to technical trail control.
Front suspension should help with control over roots, bumps and rougher sections.
Hydraulic disc brakes should provide the control needed for technical trail riding.
The brake specification mentions four-piston brakes, which should improve control on steeper or rougher trails.
The 29-inch wheel size should help rollover and stability on technical terrain.
Torque is above average for this type of e-bike.
Torque-sensing assistance should help with smoother control on technical sections.
The bike is heavier than average for its type, which may affect technical handling.
Multiple ride modes should help the rider manage assistance on technical trails.
77
Good trail control
The mountain bike format should feel well suited to trail riding.
The mountain bike format should feel well suited to trail riding.
Front suspension should help the bike stay controlled over bumps and rougher paths.
Hydraulic disc brakes should improve control on loose or uneven trails.
The 29-inch wheel size should help rollover and stability on trails.
Torque is strong compared with similar e-bikes, which should help low-speed trail control.
Torque-sensing assistance should help with smoother power control on trails.
75
Good downhill control
Front suspension should help with basic control on uneven descents.
Front suspension should help with basic control on uneven descents.
Hydraulic disc brakes should provide controlled braking on descents.
The 29-inch or mullet wheel setup should help stability and control on descents.
The mountain bike design should be better suited to controlled descending.
Overview
The CUBE Reaction Hybrid SLT 800 is a mountain bike designed for off-road adventures, offering smooth motor support and reliable braking for varied terrain. Its 800Wh battery provides a good range for longer rides, and the removable battery adds convenience for charging and storage. However, the bike's lower motor power and heavier weight may make it less punchy for steep climbs and slightly harder to handle when lifting. While it's well-suited for trails, its charging time is on the slower side, which could be a consideration for frequent riders.
Best For
✓
This mountain e-bike should suit riders who prioritize off-road capability and want a reliable partner for trail riding. Its high battery capacity and strong motor power make it well-suited for longer rides and challenging terrain, while the hydraulic disc brakes and front suspension add confidence and comfort on uneven surfaces. Riders who value flexibility, such as the ability to charge the removable battery away from the bike, will also appreciate its practical design.
Who Should Avoid It
×
Riders seeking the most aggressive motor punch or faster charging times may be better served by alternatives. The motor power is lower than similar mountain e-bikes, which could affect performance on steep or technical trails, and the charging time is notably slower compared to rivals. However, the bike still offers strong battery capacity and confident braking, making it a solid choice for riders prioritizing range and control over quick acceleration or fast charging.
Ownership considerations
These points highlight practical ownership factors such as maintenance, storage, charging, everyday
handling and bad-weather usability.
49
Some maintenance considerations
Weak
Chain drive is common and serviceable, but needs more cleaning and lubrication than a belt drive.
Chain drive is common and serviceable, but needs more cleaning and lubrication than a belt drive.
Hydraulic disc brakes are a strong everyday setup, though they may need occasional specialist servicing.
A removable battery makes charging, storage and battery care easier.
The tyre description suggests puncture protection, which should reduce maintenance interruptions.
The aluminium frame material is practical for everyday use and general maintenance.
The mountain bike format may involve more wear from rougher riding and more complex components.
A higher number of gears can add drivetrain complexity.
0
Limited storage practicality
Poor
The frame does not appear to fold, so storage will depend more on size and weight.
The frame does not appear to fold, so storage will depend more on size and weight.
The bike is heavier than average for its type, which may make storage and moving it harder.
The removable battery can make storage and indoor charging more flexible.
15
Harder to lift
Poor
The bike is heavier than average for its type, so it may not be especially easy to lift.
The bike is heavier than average for its type, so it may not be especially easy to lift.
The listed weight is 24.7 kg.
The aluminium frame material is a practical lightweight choice for many e-bikes.
The removable battery can reduce the weight when lifting or moving the bike.
The mountain bike format can be bulkier and harder to lift than simpler urban e-bikes.
The 29-inch wheel size can make the bike more awkward to lift or store.
The larger-than-average battery capacity may add weight.
97
Excellent removable battery practicality
Excellent
The removable battery makes charging, storage and battery handling more flexible.
The removable battery makes charging, storage and battery handling more flexible.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
Because the bike is heavier than average, removing the battery can make handling and charging more convenient.
The larger battery capacity makes removable charging more useful for day-to-day convenience.
The longer charging time makes it more useful to charge the battery separately from the bike.
0
Very slow charging speed
Poor
Charging time is high compared with similar e-bikes.
Charging time is high compared with similar e-bikes.
The quoted charging time is long in absolute terms.
29
Low battery efficiency
Poor
Battery efficiency appears average for this type of e-bike.
Battery efficiency appears average for this type of e-bike.
The calculated range per battery unit is 93.75.
69
Decent everyday equipment
Mixed
The included display or control unit adds useful ride information for daily use.
The included display or control unit adds useful ride information for daily use.
A removable battery makes daily charging and storage more flexible.
Multiple ride modes should help adapt the bike to different everyday journeys.
Hydraulic disc brakes are useful equipment for confident daily riding.
Payload capacity is average or better, which helps with bags, shopping or daily kit.
53
Mixed bad-weather practicality
Mixed
Hydraulic disc brakes should provide better control and confidence in wet conditions.
Hydraulic disc brakes should provide better control and confidence in wet conditions.
Built-in lights are not listed, so bad-weather visibility may depend on extra accessories.
The mountain bike format should offer useful control on rough or slippery surfaces.
Suspension can help control and comfort on rough, wet or uneven surfaces.
The bike weight may help it feel more planted in wet or windy conditions.
The wheel size should be workable for regular poor-weather riding, depending on tyre choice.
Frame material is listed as aluminium, which gives useful durability and maintenance context.
40
Some family utility limitations
Weak
Payload capacity is average for this type of e-bike.
Payload capacity is average for this type of e-bike.
The listed maximum payload is practical for lighter utility use.
The listed maximum payload is 125 kg.
Hydraulic disc brakes are useful when carrying children, shopping or heavier loads.
A removable battery makes charging easier around family or utility use.
Battery capacity is strong compared with similar e-bikes, supporting utility trips.
Range is average or better compared with similar e-bikes, which supports practical daily use.
Where to buy
Priced at £4,499, the CUBE Reaction Hybrid SLT 800 offers a favourable position against similar 2025 mountain e-bikes, with strong support in battery capacity and braking. Its slightly slower charge time and heavier feel may be considerations for some riders.
Compared with similar mountain bike e-bikes on Bikkerr, this model sits £804.41 below average
The CUBE Reaction Hybrid SLT 800 is listed at £4,499, which sits comfortably against similar mountain e-bikes from 2025, offering a price that feels reasonable for the features included. It compares well with rivals in terms of range and battery capacity, and its strong torque support and hydraulic braking make it a solid choice for off-road riding. However, some similar e-bikes may offer a more lively feel for their weight, and the 6.5-hour charge time is slightly slower than what some competitors provide. For a mountain e-bike focused on trail suitability and control, the balance of power, braking, and battery life makes this a compelling option, especially for riders who prioritise reliability and assistance over speed. Buyers looking for a well-rounded off-road e-bike with strong support and confidence-inspiring braking are likely to see the value in this package.
We reach this value score by combining the bike’s price, specification, performance data and comparison against similar e-bikes in our database.
60
The listed price is GBP 4,499.
The bike appears to save around GBP 164 versus the average.
Range is strong compared with similar e-bikes.
Battery capacity is strong compared with similar e-bikes.
350W more powerSame range0 Ah less battery1 kg lighterSame gears
Potential limitations
Areas where this e-bike may be less strong based on its specs and comparisons.
0
Limited motor punch
Motor power is low compared with similar e-bikes.
Motor power is low compared with similar e-bikes.
Torque is above average for this type of e-bike.
Power-to-weight is low.
Torque-sensing assistance should make the motor response feel more natural.
The bike is heavier than average for its type.
The calculated power-to-weight score is 10.12.
0
Not ideal for steep hills
Torque is above average for this type of e-bike.
Torque is above average for this type of e-bike.
Power-to-weight is low.
Motor power is low compared with similar e-bikes.
The torque-sensing assistance should help the bike respond more naturally on climbs.
The bike has 10 or more gears, which should help on varied climbs.
The bike is heavier than average for its type.
The calculated power-to-weight score is 10.12.
0
Limited commuting practicality
The mountain bike format is less commuting-focused and may be less efficient for daily urban use.
The mountain bike format is less commuting-focused and may be less efficient for daily urban use.
Range is average or better compared with similar e-bikes, which supports commuting practicality.
Charging time is longer than average, which may be less convenient for daily use.
Built-in lights are not listed, so commuting equipment may need adding.
A removable battery makes home, office or indoor charging easier.
The display or control unit should make it easier to monitor assist level and battery use.
Hydraulic disc brakes are a strong practical feature for daily riding.
Payload capacity is average for this type of e-bike.
The bike is heavier than average for its type, which may make daily handling less convenient.
0
Low power-to-weight ratio
Power-to-weight is low compared with similar e-bikes.
Power-to-weight is low compared with similar e-bikes.
Motor power is low compared with similar e-bikes.
The bike is heavier than average for its type.
The calculated power-to-weight score is 10.12.
0
Limited storage practicality
The frame does not appear to fold, so storage will depend more on size and weight.
The frame does not appear to fold, so storage will depend more on size and weight.
The bike is heavier than average for its type, which may make storage and moving it harder.
The removable battery can make storage and indoor charging more flexible.
0
Very slow charging speed
Charging time is high compared with similar e-bikes.
Charging time is high compared with similar e-bikes.
The quoted charging time is long in absolute terms.
11
No built-in light advantage
Built-in lights are not listed, so separate lights may be needed.
Built-in lights are not listed, so separate lights may be needed.
The display or control unit may make light and ride-status management easier.
Battery capacity is average or better for this type of e-bike, supporting everyday powered accessories.
15
Harder to lift
The bike is heavier than average for its type, so it may not be especially easy to lift.
The bike is heavier than average for its type, so it may not be especially easy to lift.
The listed weight is 24.7 kg.
The aluminium frame material is a practical lightweight choice for many e-bikes.
The removable battery can reduce the weight when lifting or moving the bike.
The mountain bike format can be bulkier and harder to lift than simpler urban e-bikes.
The 29-inch wheel size can make the bike more awkward to lift or store.
The larger-than-average battery capacity may add weight.
E-system & battery comparison
Motor Power
250 watts
▼ 190 W below average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
10.12 W/kg
▼ 10 W/kg below average
Battery Capacity
800 Wh
▲ 169 Wh above average
Claimed Max Range
75 miles
▲ 14 miles above average
Charge Time
6h 30m
▲ 75 mins slower than average
Sensor Type
Torque and Cadence Sensor
Removable Battery
Yes
Motor Name
Bosch Performance Line CX (Generation 5 / BDU 38)
This mountain e-bike offers a balanced motor assistance that should feel natural and predictable on trails, with strong torque support to help with climbing and low-speed technical sections. Next to similar models, it should compare well in terms of smooth power delivery and range, though some e-bikes in the same category may feel more lively or punchier under acceleration. The torque and cadence sensor setup should help maintain control on rough terrain, and the assistance should feel responsive without being overly aggressive. Riders looking for a reliable, trail-focused e-bike with good range and predictable support may find this motor setup well-suited to their needs.
This explanation is based on the bike’s motor power, torque, battery capacity, claimed range, charging
time, sensor type and how those figures compare with similar e-bikes in our database.
eBike FAQs
Is this bike suitable for long off-road rides?
This mountain bike is well-suited for long off-road rides, thanks to its high battery capacity and reliable braking system. The 800Wh battery should provide a good range for extended adventures, and the hydraulic disc brakes offer confident stopping power on rough terrain. However, the bike's lower motor power and heavier weight may make it slightly less punchy on steep climbs and harder to handle when lifting, which could be a consideration for more demanding trails.
How does the motor perform when climbing steep trails?
The motor provides smooth support for climbing trails, but its 250W power and above-average weight may make steep climbs feel less punchy. While the 85Nm torque helps with controlled assistance, riders may need to pedal more actively on very steep sections. This bike is better suited for moderate trails rather than extremely steep climbs.
Does the bike handle rough terrain comfortably?
The CUBE Reaction Hybrid SLT 800 should handle rough terrain comfortably, thanks to its mountain bike design and hydraulic disc brakes, which provide confident stopping power on trails. The 800Wh battery offers a good range for longer rides, but the bike's heavier weight may make it slightly less agile when navigating tight or technical sections. Overall, it's well-suited for off-road use, though it may not be the most punchy option for steep or demanding climbs.
Is the battery capacity enough for extended adventures?
The 800Wh battery should provide a good range for extended off-road adventures, especially considering its high capacity compared to similar e-bikes. With a range of around 75 miles, it should handle longer rides on trails, though charging time is on the slower side, which might be a consideration for frequent use. The removable battery adds convenience for charging and storage, making it more practical for multi-day trips or when you need to recharge away from home.
How practical is the removable battery for charging and storage?
The removable battery is quite practical for charging and storage, as it allows you to take the battery indoors to charge it safely, which is especially useful if you're riding in wet or muddy conditions. This feature also makes it easier to store the battery separately when not in use, though you should keep in mind that the bike's overall weight is above average, which might make lifting it more challenging when the battery is installed.
Is this bike good value for its price compared to similar e-bikes?
The CUBE Reaction Hybrid SLT 800 offers a strong set of features for its price, especially with its high battery capacity and reliable braking, which are important for off-road use. However, the lower motor power and heavier weight may make it less punchy for steep climbs and slightly harder to handle when lifting. While it's well-suited for trails and longer rides, the slower charging time could be a drawback for frequent riders looking for convenience.
How does the weight of the bike affect its portability and handling?
The bike's weight of 24.7 kg makes it slightly heavier than average for a mountain e-bike, which may make it a bit more challenging to lift or carry when needed. However, this weight is typical for a mountain bike with a powerful motor and large battery, and it shouldn't significantly impact handling on trails. The added weight can provide stability at higher speeds or on rough terrain, though it may feel slightly less nimble compared to lighter models.
What are the main limitations of this e-bike for serious off-road use?
This e-bike is designed for off-road use, but its 250W motor may feel less punchy when accelerating on steep or technical trails. While the 85Nm torque and hydraulic disc brakes should handle most terrain confidently, the bike's above-average weight of 24.7kg could make it slightly harder to maneuver when lifting or carrying. Additionally, the charging time is slower compared to similar e-bikes, which might be a consideration for frequent riders.
eBike Overview
eBike Type: Mountain Bike
The style of riding intended for this bike
Released:
2025
The bike was released 1 years ago
Screen
Unknown
Lights Included
No
Weight (inc battery): 24.7 kg
The website average for electric bikes is
23.82 kg.
This electric bike is 0.87 kg over the average. Total bike weight may vary depending on frame size.
Magura Gustav PRO, Front 4-Piston/Rear 4-Piston, Hydr. Disc Brake (203)
Brake Type: Hydraulic Disc Brake
Hydraulic operated discs brakes (Very good)
Brake Rotors
203 mm rotors
Shifters
Sram AXS Pod Controller
Other Components
Saddle
Unknown
Handlebars
Unknown
Bar Tape
Unknown
Manufactures Info
Worldwide Shipping:
Yes
Delivery across the globe!
Warranty:
2 Years
Limited warranty website average:
3.12 years
The Reaction Hybrid's neat and tidy design is no accident. With the 800Wh PowerTube battery neatly concealed and the Bosch CX drive housed securely, its svelte lines disguise lots of clever features.
The Reaction Hybrid's neat and tidy design is no accident. With the 800Wh PowerTube battery neatly concealed and the Bosch CX drive housed securely, its svelte lines disguise lots of clever features.
