Giant Fathom 29 1 Bike
The Giant Fathom 29 1 is the hardtail that punches straight into trail-bike territory.
This is a trail hardtail built for riders who want one capable bike for foothill singletrack and Santa Monica Mountains climbs without stepping up to full suspension. The Fathom 29 1 earns its keep on real terrain: it climbs efficiently, then holds its line when the trail points down. If you ride the Valley's dirt on weekends, this is your do-everything bike.
It's right for you if:
You're moving up from an entry hardtail and want real trail capability.
You ride mixed terrain and want efficiency on climbs plus control on descents.
You want a hardtail that can grow with your skills for years.
You'd rather spend on a frame that lasts than replace a cheap bike in a season.
Why you'll love it:
The 29-inch wheels roll over roots and rock so you carry speed instead of getting hung up.
Hydraulic disc brakes give you confident, one-finger stopping on steep descents.
The air-sprung fork soaks up hits and tunes to your weight for a planted front end.
The dropper-ready design lets you drop your saddle and move on technical drops.
The tech you get: a lightweight ALUXX-grade aluminum frame, 29-inch wheels, a wide-range 1x drivetrain, an air-sprung trail fork, and hydraulic disc brakes.
Reserve Your Ride
(818) 818-6262 | No deposit required.
Every bike from Cycle World Bike is assembled by hand, inspected for safety, and ready to ride when you pick it up.
Brian, our lead technician, builds and tunes every bike that leaves the shop
Steve helps match the right frame size and riding position to your body
Come back anytime for adjustments, questions, or service
No guessing your size from a chart. No assembling it from a box in your garage.
Book a Fitting
Not sure which size or model is right for you? Call and schedule a fitting with Steve. He will walk you through frame sizing, riding position, and which bike matches how you ride. No commitment, no pressure. Just expert advice from someone who has been fitting riders for decades.
(818) 818-6262
Serving the San Fernando Valley since 1966. Lowest Price Guarantee on every bike we carry.
Highlights
ALUXX SL Aluminum Frame
A lighter, stiffer grade of aluminum than standard ALUXX. Optimized trail geometry with a steep 75-degree seat angle for climbing and a slack 66-degree head angle for confident descending.
130mm Giant Crest 34 Fork
A capable suspension fork with rebound and lockout controls. Soaks up roots and rocks on SFV trails without bobbing on the climbs.
SRAM Eagle 1x12 Drivetrain
A massive 11-50 cassette range covers everything from steep fire road climbs to flat singletrack sprints. One shifter, no front derailleur, clean and simple.
Dropper Seatpost Included
Remote-actuated dropper lets you drop your saddle for descents and raise it for climbs on the fly. A feature usually reserved for higher-priced builds.
Specifications
Frame | ALUXX SL-Grade Aluminum |
Fork | Giant Crest 34 SL RCL, 130mm, 44mm offset, Boost 15x110 |
Shifters | SRAM SX Eagle, 1x12 |
Front Derailleur | N/A (1x) |
Rear Derailleur | SRAM NX Eagle |
Crankset | SRAM SX Eagle, 30t (165-170mm by size) |
Bottom Bracket | SRAM DUB, press fit |
Cassette | SRAM SX Eagle, 11x50 |
Chain | SRAM SX Eagle |
Brakes | Shimano BR-MT420/410 hydraulic, Shimano RT-26 rotors 180mm F/R |
Wheelset | Giant AM 29, tubeless ready, 30mm inner width |
Hubs | Alloy, sealed |
Tires | [F] Maxxis Minion DHF 29x2.5 WT; [R] Maxxis Aggressor 29x2.5 WT |
Handlebar | Giant Contact TR35, 780x35mm |
Stem | Giant Contact SL 35 (40-50mm by size) |
Seatpost | Giant Contact Switch dropper, remote (125-170mm travel by size) |
Saddle | Giant Romero |
Pedals | Not included |
Sizes Available | S, M, L, XL |






















