Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Giant
2020 Giant Fathom 29 1
Value Guide market data · 2020 Giant Fathom 29 1
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All Fathom 29 model years
2020 Fathom 29 1 lineup
Overview
About this bike
2020 Giant Fathom 29 1 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Rock Shock Recon RL 100mm, Solo Air, 15x110 Maxle Lite
- Frame
- ALUXX SL-Grade Aluminum
Drivetrain
- Groupset
- SRAM SX
- Bottom Bracket
- SRAM DUB, press fit
- Cassette
- SRAM SX Eagle, 11x50, 12-Speed
- Chain
- SRAM SX Eagle
- Chainrings
- 30T
- Crankset
- TruVativ Descendent 6k DUB
- Rear Derailleur
- SRAM NX Eagle
- Shifters
- SRAM SX Eagle
Brakes
- Brake Levers
- Shimano MT401
- Brakes
- Shimano MT400 Hydraulic Disc, [F] 180mm [R] 160mm
Cockpit
- Handlebars
- Giant Connect Trail, 780x31.8
- Saddle
- Giant Contact, Neutral, UniClip Accessory Mount
- Seatpost
- Giant Contact Switch, 30.9, [S] 100mm, [M] 125mm, [L/XL] 150mm
- Stem
- Giant Contact
Wheels & Tires
- Axles
- Front: 15x110mm, Rear: 12x148mm
- Hubs
- [F] Giant Performance Tracker Boost 15x110mm, [R] Giant Sport Tracker, QR Boost 141
- Rims
- Giant XCT Tubeless Ready, 29", Disc (25mm inner)
- Spokes
- Sapim
- Tires
- [F] Maxxis ForeKaster Tubeless, 29x2.35", EXO, 60 TPI, Folding [R] Maxxis Rekon Race Tubeless, 29x2.35", EXO, 60 TPI, Folding
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.