Giant Fathom E+ 29 2

2021 MountainTrail Electric bicycle Manufacturer page

Giant Fathom E+ 29 2, color Gunmetal Black

Price: Not published

Prices shown first for United States
Europe: €2,899 Last known price
Fork travel: 120 mm
Wheels: 29″
Drivetrain: 1 × 10 36t / 11–46t
Gear range: 418%
Battery: 500 Wh
Weight: 19.5 kg 43.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

19 of 23 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 Aluminium, Overdrive 1½ - 1⅛" Head Tube, 141mm Boost QR, ISS, Giant EnergyPak Plus Range Extender Compatible, Integrated KS18 Kickstand Mount, compatible with fenders Not identified

Electric system

3 parts

Battery
- Giant
Display

Wireless display compatible (ANT+ and Bluetooth) Not identified
Motor
- Giant

Suspension

3 parts

Drivetrain

7 parts

Bottom bracket

None
Cassette
- Shimano Deore CS-M4100-10 10 speeds 11–46t
CS-M4100-10
Chain
- KMC e10 Sport 10 speeds
Crankset
- Factor 36t
Front derailleur

None
Rear derailleur
- Shimano Deore
Shifters
- Shimano Deore

Brakes

2 parts

Brake levers
- Shimano BL-MT200
BL-MT200
Brakes
- Shimano BR-MT200
BR-MT200

Wheels and tires

5 parts

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

Stainless steel Not identified
Tires
- Maxxis Rekon

Cockpit and contact points

5 parts

Handlebar
- Giant
Pedals

Aluminium Platform Not identified
Saddle
- Giant
Seatpost
- Giant
Stem
- Giant

Sizes and geometry

5 sizes Open in the geometry plotter

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

Size LG

Table

Reach 428mm

Stack 643mm

Wheelbase 1193mm

Head angle 68.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	384	406	428	449	470
Stackmm	625	634	643	657	671
Top tube lengthmm	575	600	625	650	675
Seat tube lengthmm	405	455	505	535	560
Head tube lengthmm	105	115	125	140	155
Head tube angle	68°	68°	68°	68°	68°
Seat tube angle	73°	73°	73°	73°	73°
Chainstay lengthmm	475	475	475	475	475
Wheelbasemm	1141	1167	1193	1219	1245
Front centermm	670	696	722	747	773
Bottom bracket dropmm	45	45	45	45	45
Bottom bracket heightmm	329	329	329	329	329
Standover heightmm	723	753	788	808	828
Fork rakemm	46	46	46	46	46
Trailmm	100.7	100.7	100.7	100.7	101
Stack/reach ratio	1.63	1.56	1.50	1.46	1.43
Suspension and parts
Crank lengthmm	165	170	170	170	170
Handlebar widthmm	780	780	780	780	780
Stem lengthmm	50	60	60	70	70

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 19.5 kg

43.0 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 46
Lowest gear: 22.7 in
Highest gear: 94.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 500 Wh

Additional specifications

Battery: Giant EnergyPak Smart 500, 36V Integrated Lithium-Ion
Fork spring: Coil
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

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

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,325 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

22.7 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Highest gear

94.9 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,347 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,347 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.7 km/h
Highest gear: 36.4 km/h

Total gear range 418%

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: 22.7–94.9 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1138 bicycles with this information, 84.2% of the class
Highest gear: 1138 bicycles with this information, 84.2% 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+ 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	Giant Fathom E+ 3 Electric Bike
Frame
Bicycle weight	19.5 kg	19.5 kg	Not informed	Not informed	Not informed	Not informed
Drivetrain
Rear sprockets	10	10	9	9	9	9
Largest sprocket	46	46	36	36	36	36
Lowest gear	22.7 in	22.7 in	29.0 in	29.0 in	27.5 in	27.5 in
Highest gear	94.9 in	94.9 in	94.9 in	94.9 in	90.0 in	90.0 in
Electric bicycle systems
Battery capacity	500 Wh	500 Wh	400 Wh	400 Wh	400 Wh	400 Wh
Other specifications
Tire width	2.4″	2.4″	2.4″	2.4″	2.6″	2.6″
Wheel size	29″	29″	29″	29″	27.5″	27.5″