Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Giant
2018 Giant Fathom 3
Value Guide market data · 2018 Giant Fathom 3
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All Fathom model years
2018 Fathom 3 lineup
Overview
About this bike
2018 Giant Fathom 3 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Suntour Raidon XC LO-R, OverDrive Tapered Steerer, 120mm
- Frame
- ALUXX SL-Grade Butted Aluminum
Drivetrain
- Groupset
- Shimano Alivio
- Bottom Bracket
- FSA, Press Fit
- Cassette
- Shimano HG400, 12-36, 9-Speed
- Chain
- KMC X9
- Chainrings
- 26/36
- Crankset
- FSA Comet
- Front Derailleur
- Shimano Deore
- Rear Derailleur
- Shimano Deore, Shadow
- Shifters
- Shimano Alivio
Brakes
- Brake Levers
- Shimano M315
- Brakes
- Shimano M315 Hydraulic Disc, [F] 180mm [R] 160mm
Cockpit
- Handlebars
- Giant Connect Trail, 31.8
- Saddle
- Giant Contact, Neutral
- Seatpost
- Giant Contact Switch, 30.9, [XS-S] 100mm, [M] 125mm, [L-XL] 150mm
- Stem
- Giant Connect
Wheels & Tires
- Hubs
- Giant Sport Tracker, 28h
- Rims
- Giant XC-2 Tubeless, 27.5", Disc
- Spokes
- Sapim
- Tires
- Maxxis Ardent Tubeless, 27.5x2.25", 60 TPI
Pedals
- Pedals
- Platform MTB
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.