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Fathom 1

2020

On most models

Within 30 days

Starting From £35

Complete Your Rider Experience

Get your dose of singletrack with more confidence and control. The combination of a lightweight hardtail frame, 100mm or 120mm suspension fork, 27.5 wheels with wide rims and cushy high-volume tyres delivers loads of traction, speed and fun on the trail.

With its lightweight ALUXX SL aluminium frame, 27.5 wheels and high-volume tyres, the new Fathom is a great choice for technical terrain and singletrack shredding. It blends the efficient ride quality of a classic hardtail with the confident ride quality of larger tyres that absorb bumps and give you more traction—so you can tackle rougher trails with total control. The new frame is designed with trail-friendly geometry that includes a more relaxed head angle made for 100mm / 120mm suspension fork.

Key Performance Factors

Proven alloy performance

ALUXX SL aluminium frameset is hand-built in-house by the world leader in aluminium engineering.

Traction and stability

Frame geometry is designed to optimise the confident, stable handling of 27.5 wheels with plush high-volume tyres—ideal for rugged, adventurous terrain.

Trail tuned

More relaxed frame geometry and control-focused components deliver better handling on the trail.

Techs & Features

ALUXX SL Aluminium Technology
OverDrive

Geometry

bike diagram with measurements referenced in table that follows
Selection of a button will change the units measurement displayed throughout the entire sizing guide section.
 XSSMLXL
A Seat Tube Length (mm) (inch)37014.639015.444517.548018.953020.9
B Seat Tube Angle (degrees)73.5°73.5°73.5°73.5°73.5°
C Top Tube Length (mm) (inch)56522.25852360523.862524.664525.4
D Head Tube Length (mm) (inch)953.71003.91104.31254.91405.5
E Head Tube Angle (degrees)67.0°67.0°67.0°67.0°67.0°
F Fork Rake (mm) (inch)421.7421.7421.7421.7421.7
G Trail (mm) (inch)108.24.3108.24.3108.24.3108.24.3108.24.3
H Wheelbase (mm) (inch)108942.9111043.7113144.5115345.4117446.2
I Chain Stay Length (mm) (inch)42516.742516.742516.742516.742516.7
J Bottom Bracket Drop (mm) (inch)451.8451.8451.8451.8451.8
K Stack (mm) (inch)5842358823.159823.561124.162524.6
L Reach (mm) (inch)39215.441116.242816.944417.546018.1
M Stand Over Height (mm) (inch)66726.369127.273128.874529.378430.9
N Handlebar Width (mm) (inch)78030.778030.778030.778030.778030.7
O Stem Length (mm) (inch)401.6401.6502602.4702.8
P Crank Length (mm) (inch)1706.71706.71756.91756.91756.9
Q Wheel Size 27.5"27.5"27.5"27.5"27.5"
Specs
  • Sizes
    S, M, L, XL
  • Colours
    Matte Gunmetal Black / Olive Green
  • Frame
    ALUXX SL-Grade Aluminum
  • Fork
    RockShox Recon RL 120mm, Solo Air, Taper, 15x110 Maxle Lite
  • Shock
    N/A
  • Handlebar
    Giant Connect Trail, 780x31.8, [GA 690]
  • Stem
    Giant Contact
  • Seatpost
    Giant Contact Switch dropper post with remote, 30.9
  • Saddle
    Giant Contact (neutral)
  • Pedals
    N/A
  • Shifters
    SRAM SX Eagle
  • Front Derailleur
    N/A
  • Rear Derailleur
    SRAM NX Eagle
  • Brakes
    Shimano MT400
  • Brake Levers
    Shimano MT401
  • Cassette
    SRAM SX Eagle, 11x50
  • Chain
    SRAM SX Eagle
  • Crankset
    TruVativ Descendent 6k DUB, 30t
  • Bottom Bracket
    SRAM DUB, press fit
  • Rims
    Giant AM 27.5 tubeless ready sleeve-joint rim, 30mm inner width
  • Hubs
    [F] Giant Tracker Performance Boost 15x110, sealed bearing [R] Giant Tracker Giant Sport Boost QR 141, loose ball
  • Spokes
    Sapim
  • Tyres
    Maxxis Ardent Race 27.5x2.6, folding, TR
  • Weight
    13.48kg (size M)

Every effort has been made to ensure accuracy throughout this website. However, Giant reserves the right to change bike specifications, features, prices and colours without prior notice.

Reviews

Every effort has been made to ensure accuracy throughout this website. However, Giant reserves the right to change bike specifications, features, prices and colours without prior notice.