Giant Fathom E+ 1 Pro 29

2020 MountainTrail Electric bicycle Manufacturer page

Giant Fathom E+ 1 Pro 29, color Metallic Red / Black

Price: Not published

Prices shown first for United States
United Kingdom: £2,999 Last known price
Fork travel: 120 mm
Wheels: 29″
Drivetrain: 1 × 12 38t / 11–50t
Gear range: 455%
Battery: 500 Wh
Weight: 23.4 kg 51.6 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

MD 165–177
LG 175–188
XL 185–198

Components

20 of 21 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 SL aluminum, Overdrive 1½ - 1⅛" head tube, 148x12mm Thru-Axle, integrated KS18 kickstand mount Not identified

Electric system

3 parts

Suspension

2 parts

Fork
- RockShox Recon RL
Rear shock

None

Drivetrain

7 parts

Bottom bracket

None
Cassette
- SRAM PG-1210 Eagle 12 speeds 11–50t
PG-1210
Chain
- SRAM SX Eagle 12 speeds
Crankset
- SRAM 38t
Front derailleur

None
Rear derailleur
- SRAM SX Eagle 12 speeds
Shifters
- SRAM SX Eagle Trigger 12 speeds

Brakes

2 parts

Brake levers
- Shimano BL-MT401
BL-MT401
Brakes
- Shimano BR-MT400
BR-MT400

Wheels and tires

5 parts

Cockpit and contact points

5 parts

Handlebar
- Giant
Pedals

None
Saddle
- Giant
Seatpost
- Giant
Stem
- Giant

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size LG

Table

Reach 430mm

Stack 635mm

Wheelbase 1197mm

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 Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	408	430	451
Stackmm	626	635	649
Top tube lengthmm	600	625	650
Seat tube lengthmm	465	505	535
Head tube lengthmm	115	125	140
Head tube angle	68°	68°	68°
Seat tube angle	73°	73°	73°
Chainstay lengthmm	475	475	475
Wheelbasemm	1171	1197	1223
Front centermm	700	726	751
Bottom bracket dropmm	45	45	45
Bottom bracket heightmm	329	329	329
Standover heightmm	760	787	791
Fork rakemm	51	51	51
Trailmm	95.7	95.7	95.7
Stack/reach ratio	1.53	1.48	1.44
Suspension and parts
Crank lengthmm	170	170	170
Handlebar widthmm	780	780	780
Stem lengthmm	60	60	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: 23.4 kg

51.6 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 22.0 in
Highest gear: 100.2 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 500, 36V 13.8Ah integrated Lithium-Ion
Tire width: 2.35″
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: 2020
Sample: 1,339 bicycles with this information
Coverage: 93.7% of the class

Lowest gear

22.0 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 85.2% of the class

Highest gear

100.2 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 85.2% of the class

Shifting

Mechanical

55 of 1,428 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,428 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.4 km/h
Highest gear: 38.4 km/h

Total gear range 455%

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: 22.0–100.2 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: 2020
Lowest gear: 1217 bicycles with this information, 85.2% of the class
Highest gear: 1217 bicycles with this information, 85.2% 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 2020 builds

Differences across 2020 builds
Specification	This bicycle Giant Fathom E+ 1 Pro 29	Giant Fathom E+ 1 Pro	Giant Fathom E+ 1 Pro Electric Bike	Giant Fathom E+ 2 29	Giant Fathom E+ 2	Giant Fathom E+ 2 Pro 29
Frame
Bicycle weight	23.4 kg	Not informed	24.62 kg	22.7 kg	22.4 kg	Not informed
Drivetrain
Front chainrings	1	1	1	2	2	1
Smallest chainring	38	38	38	28	28	36
Largest chainring	38	38	38	38	38	36
Rear sprockets	12	12	12	10	10	10
Largest sprocket	50	50	50	42	42	42
Lowest gear	22.0 in	20.9 in	20.9 in	19.3 in	18.3 in	24.9 in
Highest gear	100.2 in	95.0 in	95.0 in	100.2 in	95.0 in	94.9 in
Other specifications
Battery	Capacity: 500 WhGiant EnergyPak 500, 36V 13.8Ah integrated Lithium-Ion	Capacity: 500 WhGiant EnergyPak 500, 36V 13.8Ah integrated Lithium-Ion	Capacity: 500 WhGiant EnergyPak 500, 36V 13.8Ah integrated Lithium-Ion	Capacity: 500 WhGiant EnergyPak 500, 36V 13.8Ah Rechargeable Lithium-Ion	Capacity: 500 WhGiant EnergyPak 500, 36V 13.8Ah Rechargeable Lithium-Ion	Capacity: 500 WhGiant EnergyPak 500, 36V 13.8Ah integrated Lithium-Ion
Tire width	2.35″	2.6″	2.6″	2.4″	2.6″	2.35″
Wheel size	29″	27.5″	27.5″	29″	27.5″	29″
Fork spring	Not informed	Not informed	Not informed	Coil	Coil	Air