MountainVerified spec

2018 Giant Fathom 1

Launched at $1,480

Own a 2018 Giant Fathom 1?

Track its value in your garage, or list it for sale locally in a few taps.

What a used one is worth

New

$644

$389 to $801

Like new

$612

$370 to $761

Excellent

$580

$350 to $721

Good

$483

$292 to $601

Fair

$354

$214 to $441

For parts

$193

$117 to $240

From the launch price, aged to 2026 and adjusted for condition. Guidance from our catalog, not an appraisal.

Fork: SR Suntour Axon LO-RC, low speed compression and rebound adjust, 15mm thru-axle, OverDrive, 120mm travel
Stem: Giant Connect
Tires: Maxxis Ardent, 27.5x2.25, Folding, Tubeless, 60TPI
Brakes: Shimano BR-M365, hydraulic disc, [F] 180mm, [R] 160mm
Saddle: Giant Contact Neutral
Wheels: Giant XC-1 Disc, Tubeless
Cassette: Shimano SLX 11x46, 11-Speed
Crankset: Shimano SLX, 30T
Seatpost: Giant Contact Switch, dropper, 30.9mm
Shifters: Shimano SLX
Handlebar: Giant Connect Trail
Rear derailleur: Shimano SLX
Travel front mm: 120

L: Reach mm: 444; Stack mm: 611; Chainstay mm: 425; Wheelbase mm: 1153; Head angle deg: 67; Seat angle deg: 73.5
M: Reach mm: 428; Stack mm: 598; Chainstay mm: 425; Wheelbase mm: 1131; Head angle deg: 67; Seat angle deg: 73.5
S: Reach mm: 411; Stack mm: 588; Chainstay mm: 425; Wheelbase mm: 1109; Head angle deg: 67; Seat angle deg: 73.5
XL: Reach mm: 460; Stack mm: 625; Chainstay mm: 425; Wheelbase mm: 1174; Head angle deg: 67; Seat angle deg: 73.5

MSRP as listed on the Giant Group US product page for this model year, accessed 2026-09-21.

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