Velopedia Bicycle Archive
2020 Giant Fathom 29 2
Original specifications: geometry for 4 published sizes.
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At a glance
- Model year
- 2020
- Category
- Mountain
- Original MSRP
- $1,200.00
- Sizes
- S, M, L, XL
- Colors
- Silver, Pure Red
- Geometry
- 4 manufacturer sizes
- In this record
- 20 specifications · 2 archived images · original MSRP · geometry
- Archive ID
- 900002225
Model history 1 other year
Original buildAluminum
Frameset
| Frame Construction | ALUXX SL-Grade Aluminum |
|---|---|
| Frame Material | Aluminum |
| Fork | Suntour Raidon XC LO-R (100mm, tapered, 15x110 QR) OR Giant Crest 34 Suspension Fork |
Drivetrain
| Shifters | SRAM SX Eagle |
|---|---|
| Rear Derailleur | SRAM SX Eagle |
| Crankset | SRAM Eagle SX Eagle DUB, 30t |
| Bottom Bracket | SRAM DUB, press fit |
| Cassette | SRAM SX Eagle, 11x50 |
| Chain | SRAM SX Eagle |
| Pedals | platform |
Brakes
| Brakes | Tektro HDM 275 |
|---|
Cockpit & Contact Points
| Handlebar | Giant Connect Trail, 780x31.8, [GA 690] |
|---|---|
| Stem | Giant Contact |
| Saddle | Giant custom |
| Seatpost | Giant Connect, 30.9 |
Wheels & Tires
| Hubs | [F] Giant Tracker Performance Boost 15x110, sealed bearing [R] Giant Tracker Giant Sport Boost QR 141, loose ball |
|---|---|
| Rims | Giant XCT 29” tubeless ready sleeve-joint rim, 25mm inner width |
| Spokes | Sapim |
| Front Tire | [F] Maxxis Forekaster 2, , EXO/TR[R] Maxxis 29x2.35 Rekon Race, foldable, , EXO/T |
| Rear Tire | [F] Maxxis Forekaster 2, , EXO/TR[R] Maxxis 29x2.35 Rekon Race, foldable, , EXO/T |
Geometry
Frame measurements by size.
Published frame view
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 17 measurements
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Seat tube | 390 mm | 445 mm | 480 mm | 530 mm |
| Top tube | 585 mm | 605 mm | 625 mm | 645 mm |
| Head tube | 95 mm | 100 mm | 115 mm | 130 mm |
| Head-tube angle | 69° | 69° | 69° | 69° |
| Seat-tube angle | 73.5° | 73.5° | 73.5° | 73.5° |
| Chainstay / rear center | 442 mm | 442 mm | 442 mm | 442 mm |
| Wheelbase | 1100 mm | 1121 mm | 1142 mm | 1163 mm |
| Bottom-bracket drop | 55 mm | 55 mm | 55 mm | 55 mm |
| Reach | 406 mm | 425 mm | 441 mm | 457 mm |
| Stack | 603 mm | 608 mm | 622 mm | 636 mm |
| Standover height | 700 mm | 739 mm | 751 mm | 782 mm |
| Fork offset / rake | 42 mm | 42 mm | 42 mm | 42 mm |
| Trail | 100.5 mm | 100.5 mm | 100.5 mm | 100.5 mm |
| Crank length | 170 mm | 175 mm | 175 mm | 175 mm |
| Stem length | 60 mm | 70 mm | 80 mm | 90 mm |
| Handlebar width | 780 mm | 780 mm | 780 mm | 780 mm |
| Wheel size | 29" | 29" | 29" | 29" |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Parts & serviceability
Find replacement parts
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Bike-specific inspection checklist 21 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2020 Giant Fathom 29 2 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: ALUXX SL-Grade Aluminum · Fork: Suntour Raidon XC LO-R (100mm, tapered, 15x110 QR) OR Giant Crest 34 Suspension Fork
Suspension
Evaluate the suspension →Archived: Fork: Suntour Raidon XC LO-R (100mm, tapered, 15x110 QR) OR Giant Crest 34 Suspension Fork
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM SX Eagle · Rear derailleur: SRAM SX Eagle · Crankset: SRAM Eagle SX Eagle DUB, 30t · Bottom bracket: SRAM DUB, press fit · Cassette: SRAM SX Eagle, 11x50 · Chain: SRAM SX Eagle
Brakes
Inspect the brakes →Archived: Brakes: Tektro HDM 275
Wheels and tires
Check wheels and tires →Archived: Rims: Giant XCT 29” tubeless ready sleeve-joint rim, 25mm inner width · Hubs: [F] Giant Tracker Performance Boost 15x110, sealed bearing [R] Giant Tracker Giant Sport Boost QR 141, loose ball · Front tire: [F] Maxxis Forekaster 2, , EXO/TR[R] Maxxis 29x2.35 Rekon Race, foldable, , EXO/T · Rear tire: [F] Maxxis Forekaster 2, , EXO/TR[R] Maxxis 29x2.35 Rekon Race, foldable, , EXO/T
Controls and contact points
Archived: Handlebar: Giant Connect Trail, 780x31.8, [GA 690] · Stem: Giant Contact · Seatpost: Giant Connect, 30.9 · Saddle: Giant custom · Pedals: platform
Before and during the test ride
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Gallery2 images
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

