Giant Fathom E+ 3

Name: Giant Fathom E+ 3
Brand: Giant

2024 MountainTrail Electric bicycle Manufacturer page

Price: Not published

Prices shown first for United States
United Kingdom: £2,999 Last known price
Fork travel: 120 mm
Wheels: 29″
Drivetrain: 1 × 9 36t / 11–42t
Gear range: 382%
Battery: 500 Wh
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 162–172
MD 169–179
LG 176–186
XL 183–193

Components

21 of 24 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, EnergyPak Plus Range Extender compatible, integrated KSA18 kickstand mount Not identified

Electric system

4 parts

Suspension

1 part

Fork
- SR Suntour XCM32

Drivetrain

5 parts

Brakes

2 parts

Brake levers
- Tektro
HD-M285
Brakes
- Tektro
HD-M285

Wheels and tires

5 parts

Front hub
- Shimano HB-TC500-15
HB-TC500-15
Rear hub
- Shimano FH-MT200-B
FH-MT200HB-TC500-15
Rims
- Giant
Spokes

Stainless steel Not identified
Tires
- Maxxis Rekon

Cockpit and contact points

6 parts

Grips
- Giant
Handlebar
- Giant
Pedals

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

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 434mm

Stack 656mm

Wheelbase 1219mm

Head angle 66.0°

Seat angle 75.0°

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 Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	416	434	451	469
Stackmm	647	656	665	675
Top tube lengthmm	590	610	630	650
Seat tube lengthmm	380	420	460	495
Head tube lengthmm	110	120	130	140
Head tube angle	66°	66°	66°	66°
Seat tube angle	75°	75°	75°	75°
Chainstay lengthmm	470	470	470	470
Wheelbasemm	1197	1219	1241	1262
Front centermm	734	756	778	799
Bottom bracket dropmm	65	65	65	65
Bottom bracket heightmm	309	309	309	309
Standover heightmm	730	757	750	773
Fork rakemm	51	51	51	51
Trailmm	113.4	113.4	113.4	113.4
Stack/reach ratio	1.56	1.51	1.48	1.44
Suspension and parts
Crank lengthmm	165	165	165	165
Handlebar widthmm	750	780	780	780
Stem lengthmm	40	40	40	50

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

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 24.9 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 500Wh, Aluminium casing with highest safety standard (EN50604), CO2 Neutral production, Giant EnergyPak Plus 250 range extender compatible
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: 2024
Sample: 2,036 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

24.9 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 1,558 bicycles with this information
Coverage: 73.9% of the class

Highest gear

94.9 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 1,558 bicycles with this information
Coverage: 73.9% of the class

Shifting

Mechanical

346 of 2,107 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2024
Sample: 2,107 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.5 km/h
Highest gear: 36.4 km/h

Total gear range 382%

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: 24.9–94.9 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2024
Lowest gear: 1558 bicycles with this information, 73.9% of the class
Highest gear: 1558 bicycles with this information, 73.9% 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 2024 builds

Differences across 2024 builds
Specification	This bicycle Giant Fathom E+ 3	Giant Fathom E+ 2
Suspension
Front travel	120 mm	130 mm
Drivetrain
Largest sprocket	42	46
Lowest gear	24.9 in	22.7 in
Cockpit
Seatpost	Rigid seatpost	Dropper seatpost
Electric bicycle systems
Battery capacity	500 Wh	625 Wh