Giant Fathom E+ Junior

2021 YouthMountain youth Electric bicycle Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €2,099 Last known price
Fork travel: 80 mm
Wheels: 26″
Drivetrain: 1 × 9 34t / 11–36t
Gear range: 327%
Battery: 400 Wh
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

19 of 22 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

ALUXX grade aluminium Not identified

Electric system

3 parts

Suspension

3 parts

Drivetrain

7 parts

Bottom bracket

None
Cassette
- Shimano CS-HG200 11–36t
CS-HG200
Chain
- KMC
Crankset

Forged Alloy, 34T Not identified
Front derailleur

None
Rear derailleur
- Shimano Alivio RD-M3100 9 speeds
RD-M3100
Shifters
- Shimano Altus

Brakes

2 parts

Brake levers
- Tektro HD-M282
HD-M282
Brakes
- Tektro HD-M282
HD-M282

Wheels and tires

5 parts

Front hub
- Giant
Rear hub
- Giant
Rims
- Giant
Spokes

Stainless steel, 14g Not identified
Tires
- Maxxis

Cockpit and contact points

5 parts

Handlebar
- Giant
Pedals

None
Saddle
- Giant
Seatpost
- Giant
Stem
- Giant

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size One Size

Table

Reach 387mm

Stack 549mm

Wheelbase 1072mm

Head angle 68.0°

Seat angle 73.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	387
Stackmm	549
Top tube lengthmm	550
Seat tube lengthmm	365
Head tube lengthmm	110
Head tube angle	68°
Seat tube angle	73.5°
Chainstay lengthmm	455
Wheelbasemm	1072
Front centermm	619
Bottom bracket dropmm	35
Bottom bracket heightmm	308
Fork rakemm	40
Trailmm	93
Stack/reach ratio	1.42
Suspension and parts
Crank lengthmm	160
Stem lengthmm	50

Not published by the manufacturer: Standover height, Front travel, Rear travel, Handlebar width, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 80 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 24.6 in
Highest gear: 80.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 400 Wh

Additional specifications

Battery: Giant EnergyPak 400, 36V integrated Lithium-Ion
Fork spring: Coil
Tire width: 2.2″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

24.6 gear inches

This value is above the central range for this class.

Cohort: Youth / Mountain youth Model year: 2021
Sample: 230 bicycles with this information
Coverage: 72.3% of the class

Highest gear

80.4 gear inches

This value is above the central range for this class.

Cohort: Youth / Mountain youth Model year: 2021
Sample: 230 bicycles with this information
Coverage: 72.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.4 km/h
Highest gear: 30.8 km/h

Total gear range 327%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 24.6–80.4 gear inches
Class reference (p10–p90): 15.6–80.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2021
Lowest gear: 230 bicycles with this information, 72.3% of the class
Highest gear: 230 bicycles with this information, 72.3% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2021 builds

Differences across 2021 builds
Specification	This bicycle Giant Fathom E+ Junior	Giant Fathom E+ 29 2	Giant Fathom E+ 29 2 Electric Bike	Giant Fathom E+ 29 3	Giant Fathom E+ 29 3 Electric Bike	Giant Fathom E+ 3
Frame
Bicycle weight	Not informed	19.5 kg	19.5 kg	Not informed	Not informed	Not informed
Suspension
Front travel	80 mm	120 mm	120 mm	120 mm	120 mm	120 mm
Drivetrain
Smallest chainring	34	36	36	36	36	36
Largest chainring	34	36	36	36	36	36
Rear sprockets	9	10	10	9	9	9
Largest sprocket	36	46	46	36	36	36
Lowest gear	24.6 in	22.7 in	22.7 in	29.0 in	29.0 in	27.5 in
Highest gear	80.4 in	94.9 in	94.9 in	94.9 in	94.9 in	90.0 in
Electric bicycle systems
Battery capacity	400 Wh	500 Wh	500 Wh	400 Wh	400 Wh	400 Wh
Other specifications
Tire width	2.2″	2.4″	2.4″	2.4″	2.4″	2.6″
Wheel size	26″	29″	29″	29″	29″	27.5″