Velopedia Bicycle Archive

2020 Giant Fathom E+ 3 Power

Original manufacturer specifications including geometry for 4 published sizes.

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What Velopedia knows

Model year
2020
Category
Mountain
Original MSRP
$2,700.00
Sizes
XS, S, M, L, XL
Colors
Matte Black / Silver
Geometry
4 manufacturer sizes · Geometry context
Record coverage
22 preserved details · archived image · original MSRP · preserved geometry
Archive ID
900002215

Manufacturer catalog

Published sizes and colors

5 sizes · 1 color

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

XSSMLXL

Published colors

Matte Black / Silver

Frameset

Frame ConstructionALUXX aluminum, Overdrive 1½ - 1⅛" head tube, 141mm Boost QR, integrated KS18 kickstand mount
Frame MaterialAluminum
ForkSR Suntour XCM 32 NLO DS 15AH-110, 27.5 120mm travel, Tapered 1½ - 1⅛" steerer, lockout
Rear ShockN/A

Drivetrain

ShiftersShimano SL-M2000
Front Derailleur-
Rear DerailleurShimano Deore, 9-Speed, Shadow design
CranksetForged Alloy minimal Q-factor, 36T Steel Direct Mount ring
Bottom BracketN/A
CassetteShimano CS-HG200, 11-36T, 9-Speed
ChainKMC e.9 Sport
PedalsAluminum Platform

Brakes

BrakesTektro HD-M285, hydraulic disc, 180mm

Cockpit & Contact Points

HandlebarGiant Connect TR Riser 31.8x750mm
StemGiant Contact
SaddleGiant Sport
SeatpostGiant 30.9mm, 2-bolt Micro Adjustable, Forged Aluminium

Wheels & Tires

HubsGiant eTracker Sport, [F] 15mm Thru-Axle [R] 141mm QR
RimsGiant AM 27.5, Tubeless ready, 30mm inner width
SpokesStainless steel
Front TireMaxxis Forekaster 27.5x2.6, foldable, 60 TPI, EXO, Tubeless ready
Rear TireMaxxis Forekaster 27.5x2.6, foldable, 60 TPI, EXO, Tubeless ready

Size-specific frame data

Geometry

4 sizes · 17 measurements

Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.

MeasurementSMLXL
Seat tube405 mm455 mm505 mm535 mm
Top tube575 mm595 mm615 mm635 mm
Head tube110 mm115 mm140 mm150 mm
Head-tube angle68°68°68°68°
Seat-tube angle73°73°73°73°
Chainstay / rear center470 mm470 mm470 mm470 mm
Wheelbase1135 mm1156 mm1178 mm1199 mm
Bottom-bracket drop45 mm45 mm45 mm45 mm
Reach386 mm405 mm417 mm435 mm
Stack617 mm622 mm645 mm654 mm
Standover height753 mm760 mm787 mm791 mm
Fork offset / rake46 mm46 mm46 mm46 mm
Trail100.7 mm100.7 mm100.7 mm100.7 mm
Crank length165 mm170 mm170 mm170 mm
Stem length50 mm60 mm60 mm70 mm
Handlebar width780 mm780 mm780 mm780 mm
Wheel size27.5+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

Choose a size

S geometry

Archive context: Its reach of 386 mm sits toward the shorter end. The seat angle of 73° sits toward the more relaxed end. Its stack of 617 mm sits somewhat taller than typical.

Compared with 19 distinct electric-assist geometries in the Small-equivalent size cohort from model years 2020–2022 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

Parts & serviceability

Find replacement parts

3 top part searches
CassetteExact archived part
Shimano CS-HG200, 11-36T, 9-Speed Exact archived model
Front tireMatching fit standard
Maxxis Forekaster 27.5x2.6, foldable, 60 TPI, EXO, Tubeless ready Named tire and published size
Brake padsExact archived part
Tektro HD-M285, hydraulic disc, 180mm Brake model identified — verify pad shape
More qualified parts (3)
Rear derailleurMatching configuration
Shimano Deore, 9-Speed, Shadow design Interpreted as Shimano Deore · 9-speed Component family — verify exact version
ShiftersExact archived part
Shimano SL-M2000 Exact archived model
SeatpostMatching fit standard
30.9 mm seatpost Published diameter — verify length and setback

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 →
  • E-bike systemConfirm the main battery charges with the correct charger, locks securely into its mount and has no case damage, swelling, corrosion or overheating marks. Power the bike on from cold, test every assist mode and ask for available battery-health and diagnostic records.Check the battery and electronics →
  • 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 →
  • 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. If it is set up tubeless, confirm both tires hold pressure and ask when the sealant was last refreshed.Check wheels and tires →
Bike-specific inspection checklist 25 checks based on 7 archived component groups Open checklistClose checklist
0 of 25 checked Progress stays in this browser for this bike.

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.

Archived: 2020 Giant Fathom E+ 3 Power · Electric-assist · Published sizes: XS, S, M, L, XL

Archived: Frame: ALUXX aluminum, Overdrive 1½ - 1⅛" head tube, 141mm Boost QR, integrated KS18 kickstand mount · Fork: SR Suntour XCM 32 NLO DS 15AH-110, 27.5 120mm travel, Tapered 1½ - 1⅛" steerer, lockout

Archived: Fork: SR Suntour XCM 32 NLO DS 15AH-110, 27.5 120mm travel, Tapered 1½ - 1⅛" steerer, lockout

Archived: Shifters: Shimano SL-M2000 · Front derailleur: - · Rear derailleur: Shimano Deore, 9-Speed, Shadow design · Crankset: Forged Alloy minimal Q-factor, 36T Steel Direct Mount ring · Cassette: Shimano CS-HG200, 11-36T, 9-Speed · Chain: KMC e.9 Sport

Archived: Brakes: Tektro HD-M285, hydraulic disc, 180mm

Archived: Rims: Giant AM 27.5, Tubeless ready, 30mm inner width · Hubs: Giant eTracker Sport, [F] 15mm Thru-Axle [R] 141mm QR · Front tire: Maxxis Forekaster 27.5x2.6, foldable, 60 TPI, EXO, Tubeless ready · Rear tire: Maxxis Forekaster 27.5x2.6, foldable, 60 TPI, EXO, Tubeless ready

Controls and contact points

Archived: Handlebar: Giant Connect TR Riser 31.8x750mm · Stem: Giant Contact · Seatpost: Giant 30.9mm, 2-bolt Micro Adjustable, Forged Aluminium · Saddle: Giant Sport · Pedals: Aluminum Platform

Archived: Giant Fathom E+ 3 Power · electric-assist identification

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.

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