Highlights based on this e-bike’s specs, comparisons and practical strengths.
100
Excellent battery efficiency
The bike appears to get strong range from its battery size.
The bike appears to get strong range from its battery size.
The calculated range per battery unit is 120.
Range is strong despite only average or smaller battery capacity, which supports the efficiency result.
86
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 appears to include larger rotors, which can help braking power and heat management.
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 average for this type of e-bike.
Battery efficiency appears strong, which should help stretch range on longer rides.
The removable battery can make charging easier during longer days or multi-stop rides.
Charging time is average for this type of e-bike.
The display or control unit should make it easier to monitor assistance and battery use on longer rides.
83
Good range-to-weight balance
Range is high compared with similar e-bikes.
Range is high compared with similar e-bikes.
The bike weight is average for this type of e-bike.
Battery efficiency appears strong, which supports a better range-to-weight balance.
Range is strong without needing an unusually large battery, which supports efficiency.
The calculated range per kg is 3.22.
The calculated range per battery unit is 120.
78
Useful removable battery
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.
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.
69
Mixed 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 low compared with similar e-bikes, which may limit off-road climbing support.
The 29-inch wheel size should help rollover and stability on rougher terrain.
68
Mixed rough-road comfort
Front suspension should help absorb bumps from potholes, paths and rougher roads.
Front suspension should help absorb bumps from potholes, paths and rougher roads.
The larger wheel size should help roll over bumps and rough surfaces more smoothly.
The mountain bike format is generally better suited to rougher terrain.
Hydraulic disc brakes add useful control on rougher routes.
The bike weight may help it feel more planted over rough surfaces.
Frame material is listed as aluminium, which gives useful comfort and build context.
68
Mixed stable ride feel
The mountain bike format should feel stable on uneven or rougher routes.
The mountain bike format should feel stable on uneven or rougher routes.
The bike weight should help it feel more planted and settled on the road.
The larger wheel size should support a more stable and settled ride feel.
Hydraulic disc brakes should add confidence and control to the overall ride feel.
Suspension should help the bike feel more settled over uneven surfaces.
A solid payload rating can support a more stable everyday ride feel.
Frame material is listed as aluminium, which gives useful build and ride-feel context.
67
Mixed 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 appears to include larger rotors, which can help braking power and heat management.
The 29-inch wheel size should help rollover and stability on technical terrain.
Torque is low compared with similar e-bikes, which may limit technical climbing and control.
Torque-sensing assistance should help with smoother control on technical sections.
Overview
The Giant Fathom E+ 2 is a mountain bike designed for trail riding, offering smooth motor support and efficient range that makes it well-suited for longer rides. Its hydraulic disc brakes provide confident stopping power, while the removable battery adds convenience for charging and storage. However, the motor's lower power and torque may feel less punchy when accelerating or climbing steep hills, and the charging time is on the slower side for an e-bike of this type. Despite its weight, the bike feels balanced for its intended use, though it's not the easiest to lift when needed.
Best For
✓
This mountain e-bike should suit trail riders who want a balance of performance and practicality for off-road adventures. Its above average range for similar e-bikes makes it a good choice for longer rides, and the hydraulic disc brakes provide confident stopping power on rough terrain. The removable battery adds flexibility for charging away from the bike, which is especially useful for riders who travel to remote trails. Riders who value a natural response to pedaling effort and some comfort over uneven surfaces will also find this bike appealing.
Who Should Avoid It
×
Riders tackling steep or technical trails may be better served by a mountain e-bike with higher torque and more powerful motor support. The motor power and torque are below average for this type of e-bike, which could affect acceleration and hill-climbing performance. Charging speed is also slower than some similar models, which might be a drawback for riders who need quick battery top-ups. However, the bike still offers strong braking confidence and a good range for longer rides, making it a solid choice for less aggressive trail use.
Ownership considerations
These points highlight practical ownership factors such as maintenance, storage, charging, everyday
handling and bad-weather usability.
37
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.
Tyres are listed, but there is no clear puncture-protection signal.
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.
7
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 removable battery can make storage and indoor charging more flexible.
24
Harder to lift
Poor
The bike weight is average for this type of e-bike.
The bike weight is average for this type of e-bike.
The listed weight is 23.3 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.
78
Useful removable battery
Good
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.
23
Very slow charging speed
Poor
Charging time is average for this type of e-bike.
Charging time is average for this type of e-bike.
The quoted charging time is long in absolute terms.
100
Excellent battery efficiency
Excellent
The bike appears to get strong range from its battery size.
The bike appears to get strong range from its battery size.
The calculated range per battery unit is 120.
Range is strong despite only average or smaller battery capacity, which supports the efficiency result.
57
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.
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.
34
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 130 kg.
Hydraulic disc brakes are useful when carrying children, shopping or heavier loads.
A removable battery makes charging easier around family or utility use.
Range is average or better compared with similar e-bikes, which supports practical daily use.
Where to buy
Priced at £3,299, the Giant Fathom E+ 2 looks favourably positioned against similar 2024 mountain e-bikes, offering a competitive edge with its feature set. Its value is supported by a well-rounded spec, though potential trade-offs may exist in specific component choices.
Compared with similar mountain bike e-bikes on Bikkerr, this model sits £2,063.99 below average
Lowest price now: £2,639.00Best price ever seen:
£2,639.00Price drop detectedPrices update every ~24 hours
The Giant Fathom E+ 2 is listed at £3,299, which sits comfortably against similar mountain e-bikes from 2024, offering a price that feels reasonable for the features included. It compares well with rivals in terms of range, with 75 miles on a single charge, and the efficient use of its 625Wh battery, which is supported by strong torque-sensing assistance and hydraulic disc brakes that improve control and confidence on rough terrain. However, some alternatives in the same category may offer stronger climbing support or feel more lively for their weight, which could be important for riders tackling steeper trails. For a mountain e-bike focused on trail comfort and control, the Fathom E+ 2 provides a solid package that balances performance with practicality, making it a sensible choice for riders who prioritize reliability and comfort over outright power. Buyers looking for a well-rounded off-road e-bike that doesn’t push the limits of hill-climbing ability may find the value case particularly clear here.
We reach this value score by combining the bike’s price, specification, performance data and comparison against similar e-bikes in our database.
48
The listed price is GBP 3,299.
The bike appears to save around GBP 1,364 versus the average.
350W more powerSame range1 Ah less battery3 kg heavier1 more 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 below average for this type of e-bike.
Power-to-weight is low.
Torque-sensing assistance should make the motor response feel more natural.
The calculated power-to-weight score is 10.73.
0
Not ideal for steep hills
Torque is below average for this type of e-bike.
Torque is below 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 calculated power-to-weight score is 10.73.
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 calculated power-to-weight score is 10.73.
7
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 removable battery can make storage and indoor charging more flexible.
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.
23
Very slow charging speed
Charging time is average for this type of e-bike.
Charging time is average for this type of e-bike.
The quoted charging time is long in absolute terms.
24
Harder to lift
The bike weight is average for this type of e-bike.
The bike weight is average for this type of e-bike.
The listed weight is 23.3 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.
27
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 average or better, which is useful for regular commuting.
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.
E-system & battery comparison
Motor Power
250 watts
▼ 190 W below average
Motor Torque
70 Nm
▼ 8.5 Nm below average
Power-to-weight
10.73 W/kg
▼ 9.6 W/kg below average
Battery Capacity
625 Wh
▼ 5.9 Wh below average
Claimed Max Range
75 miles
▲ 14 miles above average
Charge Time
5h
▼ 15 mins faster than average
Sensor Type
Torque and Cadence Sensor
Removable Battery
Yes
Motor Name
Giant Sync Drive Sport 2
This mountain e-bike offers legal-style pedal assist with strong torque support for its category, making it feel reasonably capable on trails. Next to similar models, its motor may feel a bit more modest in outright punch, but the torque and cadence sensing should help balance natural response with predictable assistance. Climbing steeper trails may require more effort from the rider, as the torque is more modest than many similar trail e-bikes. The motor’s efficiency and range support should make it a solid choice for longer rides, though some similar e-bikes may feel livelier under effort. Riders looking for a reliable, efficient motor that supports trail riding without expecting high-speed punch may find this 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?
The Giant Fathom E+ 2 is well-suited for long off-road rides, thanks to its high range of 75 miles, which should cover most trail adventures without frequent recharging. The hydraulic disc brakes provide confident stopping power, even on rough terrain, and the removable battery adds convenience for charging. However, the motor's lower power and torque may make steep climbs feel more challenging, so riders should be prepared for a slightly less punchy acceleration when needed.
How does the motor perform when climbing steep trails?
The motor provides smooth support for climbing trails, but it may feel less punchy when tackling very steep sections. With 250 watts of power and 70 Newton meters of torque, it should handle moderate inclines well, but riders looking for strong acceleration or heavy hill climbing might find it a bit limited. The motor's performance is best suited for trails that aren't overly steep or technical.
Does the bike handle rough terrain comfortably?
The Giant Fathom E+ 2 should handle rough terrain reasonably well, thanks to its hydraulic disc brakes and mountain bike design, which provide good control and stopping power on trails. However, the motor's lower power and torque may make it feel less responsive when accelerating or climbing steep sections. While it's not the most aggressive e-mountain bike, it should still be comfortable for most trail conditions and longer rides, especially with its efficient battery range.
Is the battery efficient enough for regular trail use?
The battery should handle regular trail use well, offering a range of 75 miles on a single charge, which is high compared to similar e-bikes. This makes it a solid choice for most trail rides without needing frequent recharging. The removable battery also adds convenience for charging, though the average battery capacity and slower charging time may be a consideration for longer or more frequent rides.
How easy is it to charge and maintain the battery?
The battery is removable, which makes it easy to charge separately from the bike, especially if you're at home or a trailside charging station. While the battery capacity is average for this type of e-bike, its efficiency is strong, meaning you should get a good range out of it for most trail rides. Charging time is on the slower side, so you may want to plan ahead if you're heading out for a long ride and need a full charge.
Who is this bike best suited for?
The Giant Fathom E+ 2 is best suited for riders who prioritize range and braking confidence on trails, especially for longer rides. Its efficient battery and hydraulic disc brakes make it reliable for extended off-road use, though the motor's lower power and torque may feel less responsive when climbing steep hills or accelerating quickly. Riders looking for a balance between trail performance and practicality, with a focus on endurance rather than speed, will find this bike well-suited for their needs.
Is this bike good value for the price?
The Giant Fathom E+ 2 offers solid features for trail riding, including a high range and confident braking, which are strong points for the price. However, the motor's lower power and torque may feel less responsive on steep climbs or when accelerating quickly. While the battery efficiency is good, the charging time is slower than some competitors, and the bike's weight makes it a bit harder to lift. Overall, it's a reliable mountain bike for regular trail use, but buyers should consider if the motor's limitations align with their riding needs.
What are the main compromises of this bike?
The main compromises of the Giant Fathom E+ 2 include its lower motor power and torque, which may feel less punchy when accelerating or climbing steep trails. While the bike offers a high range and efficient battery use, the motor's performance is on the weaker side compared to similar e-bikes, and the charging time is slower than ideal. Additionally, the bike's average weight makes it slightly harder to lift, which could be a consideration for those who need to carry it frequently.
eBike Overview
eBike Type: Mountain Bike
The style of riding intended for this bike
Released:
2024
The bike was released 2 years ago
Screen
Giant RideControl Dash (full-color LCD display)
Lights Included
No
Weight (inc battery): 23.3 kg
The website average for electric bikes is
23.93 kg.
This electric bike is 0.64 kg under the average. Total bike weight may vary depending on frame size.
Sizing & Geometry
Min / Max Rider Height
S: 163–172 cm | M: 169–179 cm | L: 176–186 cm | XL: 183–193 cm
