MountainPartial spec
2021 Giant Fathom 29 2
Lists today at $1,500 (2026-09)
Own a 2021 Giant Fathom 29 2?
Track its value in your garage, or list it for sale locally in a few taps.
What a used one is worth
Open the value toolNew
$838
$541 to $1,010
Like new
$796
$514 to $959
Excellent
$754
$487 to $909
Good
$629
$406 to $757
Fair
$461
$298 to $555
For parts
$251
$162 to $303
From the launch price, aged to 2026 and adjusted for condition. Guidance from our catalog, not an appraisal.
Overview
- Brand
- Giant
- Model family
- Fathom
- Model year
- 2021
- Category
- Mountain · trail
- Frame material
- aluminum
- Sizes
- S, M, L, XL
- Wheel size
- 29
- Current list price
- $1,500 (as of 2026-09)
Drivetrain
- Speeds
- 12
- Groupset
- Shimano Deore
- Electronic
- false
Build
- Fork
- Giant Crest 34 RCL, 130mm, Boost 15x110
- Stem
- Giant Contact TR 35
- Tires
- [F] Maxxis DHF, tubeless, 29x2.5, WT, foldable, EXO, TR [R] Maxxis Aggressor, tubeless, 29x2.5, WT, foldable, EXO, TR
- Brakes
- Tektro TKD143 [F&R] 2-Piston, 180mm Rotors [F&R]
- Saddle
- Giant Romero
- Wheels
- Giant AM 29 wheelset, alloy, 30mm inner
- Cassette
- Shimano Deore, 12-speed, 10x51
- Crankset
- Praxis Cadet Boost, 30t
- Seatpost
- Giant Contact Switch dropper post with remote, 30.9
- Shifters
- Shimano Deore
- Handlebar
- Giant Contact Trail, 35
- Rear derailleur
- Shimano Deore, Shadow+
- Travel front mm
- 130
Geometry
- L
- Reach mm: 470; Stack mm: 631; Chainstay mm: 435; Wheelbase mm: 1203; Head angle deg: 66; Seat angle deg: 75
- M
- Reach mm: 445; Stack mm: 622; Chainstay mm: 435; Wheelbase mm: 1174; Head angle deg: 66; Seat angle deg: 75
- S
- Reach mm: 425; Stack mm: 622; Chainstay mm: 435; Wheelbase mm: 1154; Head angle deg: 66; Seat angle deg: 75
- XL
- Reach mm: 490; Stack mm: 640; Chainstay mm: 435; Wheelbase mm: 1227; Head angle deg: 66; Seat angle deg: 75
Last Giant US MSRP shown on the archived model-year page, observed 2026-09-21; not the launch MSRP (Giant changed this model year's price after launch). Price labels fixed 2026-09-27: moved $1,500 from msrp_usd to list_price_usd (as of 2026-09) and set msrp_usd to null per the Giant model-year price audit.
For sale now
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Other Fathom builds and years
- 2022 Fathom 1$1,850
- 2022 Fathom 2$1,500
- 2022 Fathom 29 1$1,850
- 2022 Fathom 29 2$1,500
- 2021 Fathom 1$1,650
- 2021 Fathom 2$1,500
- 2021 Fathom 29 1$1,650
- 2020 Fathom 1$1,500
- 2020 Fathom 2$1,200
- 2020 Fathom 29 1$1,500
- 2020 Fathom 29 2$1,200
- 2019 Fathom 1$1,470
- 2019 Fathom 2$1,155
- 2019 Fathom 29 1$1,470
- 2019 Fathom 29 2$1,155
- 2018 Fathom 1$1,480
- 2018 Fathom 2$1,175
- 2018 Fathom 29 1$1,480
- 2018 Fathom 29 2$1,070
- 2017 Fathom 1
- 2017 Fathom 2
- 2017 Fathom 29 1
- 2017 Fathom 29 2