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Giant Fathom 29er 1 Mountain Bike (2020)



Crank up steep climbs with smooth-rolling efficiency and swoop down singletrack descents with stability and speed. This aluminum hardtail 29er delivers a balanced ride quality on XC terrain.

Built on an ALUXX SL aluminum frame, Fathom 29 features updated geometry that produces a stable ride quality for challenging XC trails. The frame is optimized for a 100mm suspension fork giving you efficiency on the climbs and total control on the descents.

Proven alloy performance

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

Balance and stability

Frame geometry is designed to optimize the balance and roll-over capabilities of 29-inch wheels.

XC control

The suspension fork offers 100mm of smooth travel for added XC control.

Sizes S, M, L, XL
Colors Metallic Navy
Frame ALUXX SL-Grade Aluminum
Fork Rock Shock Recon RL 100mm, Solo Air, 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 XCT 29” tubeless ready sleeve-joint rim, 25mm inner width
Hubs [F] Giant Tracker Performance Boost 15x110, sealed bearing [R] Giant Tracker Giant Sport Boost QR 141, loose ball
Spokes Sapim
Tires [F] Maxxis Forekaster 2, , EXO/TR[R]Maxxis 29x2.35 Rekon Race, foldable, , EXO/T
    S M L XL
A SEAT TUBE LENGTH (inch) 15.4 17.5 18.9 20.9
B SEAT TUBE ANGLE 73.5° 73.5° 73.5° 73.5°
C TOP TUBE LENGTH (inch) 23 23.8 24.6 25.4
D HEAD TUBE LENGTH (inch) 3.7 3.9 4.5 5.1
E HEAD TUBE ANGLE 69.0° 69.0° 69.0° 69.0°
F FORK RAKE (inch) 1.7 1.7 1.7 1.7
G TRAIL (inch) 3.9 3.9 3.9 3.9
H WHEELBASE (inch) 43.3 44.1 45 45.8
I CHAIN STAY LENGTH (inch) 17.4 17.4 17.4 17.4
J BOTTOM BRACKET DROP (inch) 2.2 2.2 2.2 2.2
K STACK (inch) 23.7 23.9 24.5 25
L REACH (inch) 16 16.7 17.4 18
M STAND OVER HEIGHT (inch) 27.6 29.1 29.6 30.8
N HANDLEBAR WIDTH (inch) 30.7 30.7 30.7 30.7
O STEM LENGTH (inch) 2.4 2.8 3.1 3.5
P CRANK LENGTH (inch) 6.7 6.9 6.9 6.9
Q WHEEL SIZE 29" 29" 29" 29"