2025

Giant Fathom

Name: 2025 Giant Fathom
Brand: Giant

Trail

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Size / SM, MD, LG

Manufacturer Website

At a glance

The 2025 Giant Fathom is an Trail Aluminium / Alloy mountain bike. It comes in a range of sizes, including SM, MD, LG and a Shimano drivetrain. The bike is part of Giant's Fathom range of mountain bikes.

Where To Buy

Giant

Giant Fathom

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Reviews

Specifications

Frameset

Frame

ALUXX SL-grade aluminum, 12x148mm thru-axle
Fork

Giant STL 34, RCL, 140mm, 44mm offset, Boost 15x110

Wheels

Hubs

alloy, sealed
Wheels

Giant AM 27.5, tubeless ready sleeve-joint rim, 30mm inner width
Spokes

stainless
Tires

Front: DHF 27.5x2.5"" (R) Maxxis Dissector 27,5x2.4"

Drivetrain

Chain

KMC X-11
Crank

Shimano CUES FC-U6000, 30t S:170mm, M:170mm, L:170mm, XL:170mm
Bottom Bracket

Shimano, threaded
Rear Derailleur

Shimano CUES RD-U6000
Shifters

Shimano CUES SL-6000, 1x10

Components

Brakeset

Shimano BR-MT420, hydraulic, Shimano RT-26 rotors [F]180mm, [R]180mm
Handlebar

Giant Contact SL TR35, 780x35mm
Saddle

Giant Romero
Seatpost

Giant Contact Switch AT dropper, remote S: 110-140mm travel / 30.9 x 395mm
Stem

Giant Contact SL 35 S:40mm, M:40mm, L:50mm, XL:50mm
Grips

Giant Sole-O

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Geometry

Frame Size	SM	MD	LG
Bottom Bracket Drop	60mm	60mm	60mm
Bottom Bracket Height	295mm	295mm	295mm
Chainstay Length	438mm	438mm	438mm
Crank Length	165mm	170mm	170mm
Front Center	726mm	746mm	774mm
Handlebar Width	780mm	780mm	780mm
Head Tube Angle	66°	66°	66°
Head Tube Length	95mm	95mm	105mm
Rake	44mm	44mm	44mm
Reach	425mm	445mm	470mm
Seat Tube Angle	75°	75°	75°
Seat Tube Length	380mm	430mm	465mm
Stack	622mm	622mm	631mm
Stack Reach Ratio	1.464	1.398	1.343
Standover Height	708mm	727mm	746mm
Stem Length	40mm	40mm	50mm
Top Tube Length	592mm	612mm	639mm
Trail	113mm	113mm	113mm
Wheel Kind Front	27.5	27.5	27.5
Wheel Kind Rear	27.5	27.5	27.5
Wheelbase	1157mm	1177mm	1206mm

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FAQ

Q: Where to buy a 2025 Giant Fathom?

The 2025 Giant Fathom may be purchased directly from Giant.

Q: What size 2025 Giant Fathom should I get?

The 2025 Giant Fathom comes in sizes SM, MD, LG. After measuring your height, use the size chart below to find the typical Giant Fathom size for your height. Remember that these sizes are a general guide and bike sizes can vary between riders and bikes. The best way to find your size is to go for a test ride.

Rider Height (cm)	Rider Height (in)	Frame Size
148cm - 158cm	4'10" - 5'2"	XS
158cm - 168cm	5'2" - 5'6"	S
168cm - 178cm	5'6" - 5' 10"	M
178cm - 185cm	5'10" - 6'1"	L
185cm - 193cm	6'1" - 6'4"	XL
193cm - 198cm	6'4" - 6'6"	XXL