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Fathom 1 (2021)


Features: Fathom 1 (2021)


Additional information



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Get your dose of singletrack on a fun hardtail that puts you in control. The combination of a lightweight hardtail frame, 130mm suspension fork and 27.5 wheels with wide rims and high-volume tyres delivers loads of traction, speed and fun on the trail.

With its updated ALUXX SL aluminium frame, quick-handling 27.5 wheels and high-volume tyres, 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 frame is designed with trail-friendly geometry that includes a more relaxed head angle and a 130mm suspension fork.

Key Performance Factors

Trail Tuned Design

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

Responsive Handling

Frame geometry is designed to optimise the confident, stable handling of plush high volume tyres (27.5×2.6), and is ideal for rugged, adventurous terrain.

Smooth Control

More relaxed frame geometry (compared to XC) and control-focused components deliver added control for trail riding conditions.

Sizes S, M, L, XL
Colours Gloss Teal
Frame ALUXX SL-Grade Aluminium
Fork RockShox 35 Silver TK air sprung 130mm travel fork
Shock N/A
Handlebar Giant Contact TR, 780x35mm
Stem Giant Contact TR 35
Seatpost Giant Contact Switch dropper post with remote, 30.9
Saddle Giant Romero
Pedals platform
Shifters SRAM SX Eagle
Front Derailleur N/A
Rear Derailleur SRAM NX Eagle
Brakes Shimano MT420
Brake Levers Shimano MT401
Cassette SRAM SX Eagle, 11×50
Chain SRAM SX Eagle
Crankset SRAM SX Eagle, 30t
Bottom Bracket SRAM DUB, press fit
Rims Giant AM 27.5, tubeless ready, sleeve-joint rim, 30mm inner width
Hubs Giant Tracker Performance Boost thru axle
Spokes Sapim
Tyres Maxxis Ardent Race 27.5×2.6, folding, TR
Extras Tubeless ready


A Seat Tube Length 380 430 465 495
B Seat Tube Angle 75 75 75 75
C Top Tube Length 592 612 639 662
D Head Tube Length 95 95 105 115
E Head Tube Angle 66 66 66 66
F Fork Rake 44 44 44 44
G Trail 113 113 113 113
H Wheel Base 1154 1174 1203 1227
I Chain Stay Length 435 435 435 435
J Bottom Bracket Drop 60 60 60 60
K Stack 622 622 631 640
L Reach 425 445 470 490
M Stand Over Height 712 726 746 771
N Handlebar Width 780 780 780 780
O Stem Length 40 40 50 50
P Crank Length Dec 165 170 170 170
Q Wheel Size Alt 27.5″ 27.5″ 27.5″ 27.5″

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