Velopedia Bicycle Archive
2017 Giant Fathom 2
Original manufacturer specifications including geometry for 5 published sizes.
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What Velopedia knows
- Model year
- 2017
- Category
- Mountain
- Sizes
- S, M, L, XL
- Colors
- Green
- Geometry
- 5 manufacturer sizes · Geometry context
- Record coverage
- 22 preserved details · archived image · preserved geometry
- Archive ID
- 900002226
Frameset
| Frame Construction | ALUXX SL-grade aluminum |
|---|---|
| Frame Material | Aluminum |
| Fork | SR Suntour Raidon XC LO-R, 9mm thru-axle, OverDrive, 120mm travel |
| Rear Shock | N/A |
Drivetrain
| Shifters | Shimano Alivio |
|---|---|
| Front Derailleur | Shimano Deore |
| Rear Derailleur | Shimano Deore |
| Crankset | FSA Comet, 24/38 |
| Bottom Bracket | FSA, Press fit |
| Cassette | Shimano HG400 12x36, 9-speed |
| Chain | KMC X9 |
| Pedals | Platform, caged |
Brakes
| Brakes | Shimano M315, hydraulic disc, [F] 180mm [R] 160mm |
|---|
Cockpit & Contact Points
| Handlebar | Giant Connect Trail, 31.8mm |
|---|---|
| Stem | Giant Connect |
| Saddle | Giant Connect Upright |
| Seatpost | TranzX YSP-03 dropper post, internal routing, 30.9mm |
Wheels & Tires
| Hubs | Giant Sport Tracker Disc, [F] 9mm thru-axle 28h, [R] QR 32h |
|---|---|
| Rims | Giant Alloy, Double wall |
| Spokes | Stainless Steel, 14g |
| Front Tire | Maxxis Ardent, 27.5x2.25, Folding |
| Rear Tire | Maxxis Ardent, 27.5x2.25, Folding |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Seat tube | 370 mm | 390 mm | 445 mm | 480 mm | 530 mm |
| Top tube | 565 mm | 585 mm | 605 mm | 625 mm | 645 mm |
| Head tube | 95 mm | 100 mm | 110 mm | 125 mm | 140 mm |
| Head-tube angle | 67° | 67° | 67° | 67° | 67° |
| Seat-tube angle | 73.5° | 73.5° | 73.5° | 73.5° | 73.5° |
| Chainstay / rear center | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm |
| Wheelbase | 1089 mm | 1109 mm | 1131 mm | 1153 mm | 1174 mm |
| Bottom-bracket drop | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
| Reach | 392 mm | 411 mm | 428 mm | 444 mm | 460 mm |
| Stack | 584 mm | 588 mm | 598 mm | 611 mm | 625 mm |
| Standover height | 697 mm | 714 mm | 743 mm | 753 mm | 786 mm |
| Fork offset / rake | 42 mm | 42 mm | 42 mm | 42 mm | 42 mm |
| Trail | 105 mm | 105 mm | 105 mm | 105 mm | 105 mm |
| Crank length | 170 mm | 170 mm | 175 mm | 175 mm | 175 mm |
| Stem length | 70 mm | 80 mm | 90 mm | 100 mm | 110 mm |
| Handlebar width | 730 mm | 730 mm | 730 mm | 730 mm | 730 mm |
| Wheel size | 27.5" | 27.5" | 27.5" | 27.5" | 27.5" |
Geometry source: Giant first-party size geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
XS geometry
Archive context: The chainstay of 425 mm sits toward the shorter rear-center end. Its reach of 392 mm sits toward the longer end. The head angle of 67° sits toward the slacker end.
Compared with 18 distinct mountain geometries in the XS-equivalent size cohort from model years 2015–2019 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XS geometry S geometry
Archive context: The chainstay of 425 mm sits toward the shorter rear-center end. Its reach of 411 mm sits toward the longer end. Its trail of 105 mm sits toward the higher-trail end.
Compared with 37 distinct mountain geometries in the Small-equivalent size cohort from model years 2015–2019 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze S geometry M geometry
Archive context: The chainstay of 425 mm sits toward the shorter rear-center end. Its trail of 105 mm sits toward the higher-trail end. Its reach of 428 mm sits somewhat longer than typical.
Compared with 39 distinct mountain geometries in the Medium-equivalent size cohort from model years 2015–2019 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze M geometry L geometry
Archive context: The chainstay of 425 mm sits toward the shorter rear-center end. Its trail of 105 mm sits toward the higher-trail end. The seat angle of 73.5° sits somewhat steeper than typical.
Compared with 36 distinct mountain geometries in the Large-equivalent size cohort from model years 2015–2019 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze L geometry XL geometry
Archive context: The chainstay of 425 mm sits toward the shorter rear-center end. Its trail of 105 mm sits somewhat higher than typical. The seat angle of 73.5° sits somewhat steeper than typical.
Compared with 30 distinct mountain geometries in the XL-equivalent size cohort from model years 2015–2019 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XL geometry Parts & serviceability
Find replacement parts
KMC X9
Exact archived model
Shimano HG400 12x36, 9-speed
Exact archived model
Maxxis Ardent, 27.5x2.25, Folding
Named tire and published size
More qualified parts (6)
FSA, Press fit
Named archived component — verify dimensions
FSA Comet, 24/38
Named archived component — verify exact version
Shimano Deore
Interpreted as Shimano Deore · 9-speed Named component · published drivetrain speed — verify exact version
Shimano Deore
Interpreted as Shimano Deore · 9-speed Named component · published drivetrain speed — verify exact version
Shimano Alivio
Interpreted as Shimano Alivio · 9-speed Named component · published drivetrain speed — verify exact version
30.9 mm dropper post
Dropper post identified — verify travel, routing and insertion depth
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- BrakesBoth levers should feel firm and return cleanly. Check for fluid around the levers and calipers, inspect pad thickness and contamination, and look for worn or bent rotors.Inspect the brakes →
- SuspensionAsk when the fork was last serviced. Check the stanchions for damage, look for oil at the seals and make sure the fork moves smoothly without bushing play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 9-speed system.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 20 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: 2017 Giant Fathom 2 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: ALUXX SL-grade aluminum · Fork: SR Suntour Raidon XC LO-R, 9mm thru-axle, OverDrive, 120mm travel
Suspension
Evaluate the suspension →Archived: Fork: SR Suntour Raidon XC LO-R, 9mm thru-axle, OverDrive, 120mm travel
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano Alivio · Front derailleur: Shimano Deore · Rear derailleur: Shimano Deore · Crankset: FSA Comet, 24/38 · Bottom bracket: FSA, Press fit · Cassette: Shimano HG400 12x36, 9-speed · Chain: KMC X9
Brakes
Inspect the brakes →Archived: Brakes: Shimano M315, hydraulic disc, [F] 180mm [R] 160mm
Wheels and tires
Check wheels and tires →Archived: Rims: Giant Alloy, Double wall · Hubs: Giant Sport Tracker Disc, [F] 9mm thru-axle 28h, [R] QR 32h · Front tire: Maxxis Ardent, 27.5x2.25, Folding · Rear tire: Maxxis Ardent, 27.5x2.25, Folding
Controls and contact points
Archived: Handlebar: Giant Connect Trail, 31.8mm · Stem: Giant Connect · Seatpost: TranzX YSP-03 dropper post, internal routing, 30.9mm · Saddle: Giant Connect Upright · Pedals: Platform, caged
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.