Giant Fathom 29 2

2019 MountainCross-country Manufacturer page

Last known price: $1,155

Prices shown first for United States
Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 10 30t / 11–42t
Gear range: 382%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 163–173
MD 170–181
LG 178–189
XL 186–198

Components

18 of 20 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-Grade Aluminum Not identified

Suspension

2 parts

Fork
- SR Suntour
Rear shock

None

Drivetrain

7 parts

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

5 parts

Handlebar
- Giant
Pedals

MTB Caged, 9/16 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 425mm

Stack 608mm

Wheelbase 1121mm

Head angle 69.0°

Seat angle 73.5°

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	406	425	441	457
Stackmm	603	608	622	636
Top tube lengthmm	585	605	625	645
Seat tube lengthmm	390	445	480	530
Head tube lengthmm	95	100	115	130
Head tube angle	69°	69°	69°	69°
Seat tube angle	73.5°	73.5°	73.5°	73.5°
Chainstay lengthmm	442	442	442	442
Wheelbasemm	1100	1121	1142	1163
Front centermm	664	685	706	727
Bottom bracket dropmm	55	55	55	55
Bottom bracket heightmm	319	319	319	319
Standover heightmm	700	739	751	782
Fork rakemm	42	42	42	42
Trailmm	101	101	101	101
Stack/reach ratio	1.49	1.43	1.41	1.39
Suspension and parts
Crank lengthmm	170	175	175	175
Handlebar widthmm	780	780	780	780
Stem lengthmm	60	70	80	90

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: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 20.7 in
Highest gear: 79.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.2″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

3 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2019
Sample: 850 bicycles with this information
Coverage: 96.0% of the class

Lowest gear

20.7 gear inches

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2019
Sample: 799 bicycles with this information
Coverage: 90.2% of the class

Highest gear

79.1 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2019
Sample: 799 bicycles with this information
Coverage: 90.2% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.9 km/h
Highest gear: 30.3 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: 20.7–79.1 gear inches
Class reference (p10–p90): 16.8–105.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2019
Lowest gear: 799 bicycles with this information, 90.2% of the class
Highest gear: 799 bicycles with this information, 90.2% 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 2019 builds
Specification	This bicycle Giant Fathom 29 2	Giant Fathom 1	Giant Fathom 2	Giant Fathom 29 1
Frame
Fork material	Not informed	Not informed	Not informed	Aluminum
Suspension
Front travel	100 mm	120 mm	120 mm	100 mm
Drivetrain
Rear sprockets	10	11	10	11
Largest sprocket	42	46	42	46
Lowest gear	20.7 in	17.9 in	19.6 in	18.9 in
Highest gear	79.1 in	75.0 in	75.0 in	79.1 in
Other specifications
Tire width	2.2″	2.6″	2.4″	2.2″
Wheel size	29″	27.5″	27.5″	29″

Changes since 2018
Specification	2018 Giant Fathom 29 2	This bicycle Giant Fathom 29 2
Drivetrain
Front chainrings	2	1
Smallest chainring	26	30
Largest chainring	36	30
Rear sprockets	9	10
Smallest sprocket	12	11
Largest sprocket	36	42
Lowest gear	20.9 in	20.7 in
Highest gear	87.0 in	79.1 in