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Fathom 29 1

2021

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Crank up steep climbs with smooth-rolling efficiency. Swoop down singletrack descents with stability and speed. This aluminum hardtail 29er features progressive trail geometry, a plush suspension fork and dropper seatpost for the confidence you need to up your singletrack game.

Built on an ALUXX SL aluminum frame, the Fathom 29 features updated geometry that produces a stable ride quality for challenging XC trails. The frame is optimized for a 130mm suspension fork for smooth control on the descents. An updated Giant WheelSystem comes with tubeless tires already set up, making it easy to experience added efficiency and control, plus a reduced risk of flats on technical terrain.

Key Performance Factors

Trail Tuned Design

Balanced geometry with a 75-degree seattube angle puts the rider in a powerful pedaling position on the climbs, while a slacker 66-degree head angle boosts confidence and control on technical descents.

Responsive Handling

Lightweight ALUXX SL aluminum hardtail frame offers agile acceleration and maneuverability to help riders climb, corner and hammer the flats with efficiency and speed.

Smooth Control

Giant Crest 34 suspension fork with 130mm of travel absorbs roots, rocks and ruts. Grippy, high-volume tires boost traction on rugged terrain. And a dropper seatpost with handlebar remote lets you adjust saddle height on the fly for confident positioning on changing terrain.

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Specs
SizesS, M, L, XL
ColorsDesert Sage, Black/Charcoal
FrameALUXX SL-Grade Aluminum
ForkGiant Crest 34 RCL, 130mm, 44mm offset
ShockN/A
HandlebarGiant Contact, 35mm
StemGiant Contact TR 35
SeatpostGiant Contact Switch dropper post with remote, 30.9
SaddleGiant Romero
Pedalsplatform
ShiftersSRAM SX Eagle
Front DerailleurN/A
Rear DerailleurSRAM NX Eagle
BrakesShimano MT420
Brake LeversShimano MT401
CassetteSRAM SX Eagle, 11x50
ChainSRAM SX Eagle
CranksetSRAM SX Eagle, 30t
Bottom BracketSRAM DUB, press fit
RimsGiant AM 29, tubeless ready, sleeve-joint rim, 30mm inner width
Hubs[F] Giant Tracker Performance Boost 15x110, sealed bearing [R] Giant Tracker Giant Sport Boost QR 148, loose ball
SpokesSapim
Tires[F] Maxxis DHF, 29x2.5 WT, EXO/TR[R] Maxxis Aggressor, 29x2.5 WT, foldable, EXO/TR
WeightThe most accurate way to determine any bike’s weight is to have your local dealer weigh it for you. Many brands strive to list the lowest possible weight, but in reality weight can vary based on size, finish, hardware and accessories. All our bikes are designed for best-in-class weight and ride quality.

All specifications and prices listed are subject to change without notice.

Highlights

Built on a lightweight ALUXX SL aluminum frameset with progressive trail geometry, Fathom 29 is designed for the added stability and roll-over capabilities of 29-inch wheels with grippy, high-volume 2.5-inch tires. It has a number of trail-specific features including a 130mm suspension fork and dropper seatpost. Here’s a look at its key technologies:

1 2 3 4 5 6 7 8 9 10 Highlights

Sizing Guide and Geometry

Sizing to be used as a reference only. Please check with a local authorized Liv or Giant dealer to determine the correct size.
Available sizes may vary from country to country.

  • S
      163 cm5’4”  to 172 cm5’8”
  • M
      171 cm5’7”  to 180 cm5’11”
  • L
      179 cm5’10”  to 188 cm6’2”
  • XL
      187 cm6’2”  to 198 cm6’6”
bike diagram
  SMLXL
Seat Tube Length (mm) (inch)3801543016,946518,349519,5
Seat Tube Angle (degrees)75,0°75,0°75,0°75,0°
Top Tube Length (mm) (inch)59223,361224,163925,266226,1
Head Tube Length (mm) (inch)953,7953,71054,11154,5
Head Tube Angle (degrees)66,0°66,0°66,0°66,0°
Fork Rake (mm) (inch)441,7441,7441,7441,7
Trail (mm) (inch)1224,81224,81224,81224,8
Wheelbase (mm) (inch)115445,4117446,2120347,4122748,3
Chain Stay Length (mm) (inch)43517,143517,143517,143517,1
Bottom Bracket Drop (mm) (inch)602,4602,4602,4602,4
Stack (mm) (inch)62224,562224,563124,864025,2
Reach (mm) (inch)42516,744517,547018,549019,3
Stand Over Height (mm) (inch)73028,774529,376530,179031,1
Handlebar Width (mm) (inch)78030,778030,778030,778030,7
Stem Length (mm) (inch)401,6401,6502502
Crank Length (mm) (inch)1656,51706,71706,71706,7
Wheel Size 29"29"29"29"

Technologies & Features

ALUXX SL Aluminum Technology
OverDrive
Tubeless System

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All specifications and prices listed are subject to change without notice.