Giant Fathom 29 1 Mountain Bike 2021 - Hardtail MTB
Crank up steep climbs with smooth-rolling efficiency. Swoop down singletrack descents with stability and speed. This aluminium hardtail 29er delivers a balanced ride quality on XC terrain.
Built on an ALUXX SL aluminium frame, the Fathom 29 features updated geometry that produces a stable ride quality for challenging XC trails. The frame is optimised for a 130mm suspension fork for smooth control on the descents. An updated Giant WheelSystem comes with tubeless tyres already set up, making it easy to experience added efficiency and control, plus a reduced risk of flats on technical terrain.
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 balance and roll-over capabilities of 29-inch wheels.
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.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | ALUXX SL-Grade Aluminum |
| Fork | Giant Crest 34 RCL, 130mm, 44mm offset |
| Stem | Giant Contact TR 35 |
| Bars | Giant Contact, 35mm |
| Front Brake | Shimano MT420 |
| Rear Brake | Shimano MT420 |
| Brake Lever | Shimano MT401 |
| Rear Mech | SRAM NX Eagle |
| Shifters | SRAM SX Eagle |
| Speed | 12 |
| Rims | Giant AM 29, tubeless ready, sleeve-joint rim, 30mm inner width |
| Front Hub | Giant Tracker Performance Boost 15x110, sealed bearing |
| Rear Hub | Giant Tracker Giant Sport Boost QR 148, loose ball |
| Spokes | Sapim |
| Front Tyre | Maxxis DHF, 29x2.5 WT, EXO/TR |
| Rear Tyre | Maxxis Aggressor, 29x2.5 WT, foldable, EXO/TR |
| Seat Post | Giant Contact Switch dropper post with remote, 30.9 |
| Saddle | Giant Romero |
| Chainset | SRAM SX Eagle, 30T |
| Bottom Bracket | SRAM DUB, press fit |
| Chain | SRAM SX Eagle |
| Cassette | SRAM SX Eagle, 11x50 |
| Pedals | platform |
Giant Fathom 2021 Size Chart
|
Inside Leg (Inches) Vs Rider Height (Feet & Inches) |
26” |
27” |
28” |
29” |
30” |
31” |
32” |
33” |
34” |
35” |
36” |
37” |
|
5’ 3” |
|
|
S |
S |
S |
|
|
|
|
|
|
|
|
5’ 4” |
S |
S |
S |
S |
S |
|
|
|
|
|
|
|
|
5’ 5” |
S |
S |
S |
S |
S |
|
|
|
|
|
|
|
|
5’ 6” |
|
S |
S |
S |
S |
S |
|
|
|
|
|
|
|
5’ 7” |
|
|
S |
S |
S |
M |
M |
|
|
|
|
|
|
5’ 8” |
|
|
|
M |
M |
M |
M |
M |
|
|
|
|
|
5’ 9” |
|
|
|
M |
M |
M |
M |
M |
|
|
|
|
|
5’ 10” |
|
|
|
|
M |
M |
M |
M |
M |
|
|
|
|
5’ 11” |
|
|
|
|
M |
M |
M |
M |
M |
|
|
|
|
6’ 0” |
|
|
|
|
|
M |
M |
L |
L |
L |
|
|
|
6’ 1” |
|
|
|
|
|
L |
L |
L |
L |
L |
|
|
|
6’ 2” |
|
|
|
|
|
|
L |
L |
L |
L |
L |
|
|
6’ 3” |
|
|
|
|
|
|
L |
L |
L |
L |
L |
|
|
6’ 4” |
|
|
|
|
|
|
|
L |
L |
XL |
XL |
XL |
Giant Fathom 29 2021 Geometry
|
|
S |
M |
L |
XL |
|
SEAT TUBE LENGTH (mm) |
380 |
430 |
465 |
495 |
|
SEAT TUBE ANGLE |
75.0° |
75.0° |
75.0° |
75.0° |
|
TOP TUBE LENGTH (mm) |
592 |
612 |
639 |
662 |
|
HEAD TUBE LENGTH (mm) |
95 |
95 |
105 |
115 |
|
HEAD TUBE ANGLE |
66.0° |
66.0° |
66.0° |
66.0° |
|
FORK RAKE (mm) |
44 |
44 |
44 |
44 |
|
TRAIL (mm) |
122 |
122 |
122 |
122 |
|
WHEELBASE (mm) |
1154 |
1174 |
1203 |
1227 |
|
CHAIN STAY LENGTH (mm) |
435 |
435 |
435 |
435 |
|
BOTTOM BRACKET DROP (mm) |
60 |
60 |
60 |
60 |
|
STACK (mm) |
622 |
622 |
631 |
640 |
|
REACH (mm) |
425 |
445 |
470 |
490 |
|
STAND OVER HEIGHT (mm) |
730 |
745 |
765 |
790 |
|
HANDLEBAR WIDTH (mm) |
780 |
780 |
780 |
780 |
|
STEM LENGTH (mm) |
40 |
40 |
50 |
50 |
|
CRANK LENGTH (mm) |
165 |
170 |
170 |
170 |
|
WHEEL SIZE |
29" |
29" |
29" |
29" |
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