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Giant Fathom 1 2018 Mountain Bike


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Product Details

Giant Fathom 1 Hardtail Mountain Bike

The Giant Fathom 1 trail-ready mountain bike hardtail is upgraded with a Shimano STX 1x11 drivetrain and cartridge bearing wheels.

Upgrades from Giant Fathom 2

  • The 1x11 drivetrain with its 30t chainring and 11-46 cassette offers all the gears you'll probably need in a simplified one-by format
  • SLX is one step up the Shimano hierarchy from Deore so built to closer tolerances
  • Same goes for the upgrade to Shimano M365 hydraulic disc brakes
  • The Maxxis Ardent 27.5x2.25" tubeless tyres are mounted on smoother rolling wheels with cartridge bearing hubs

Same as Giant Fathom 2

  • Maxxis Ardent 27.5x2.25" Tubeless Tyres
  • Fitted with tubeless tyres, previously reserved for Giant's Pro-quality £2,000-plus bicycles
  • Giant so believe in the benefits of tubeless tyres (improved cushioning, traction and puncture resistance) they are now fitting them as standard on more and more of their 2018 bikes from around £1,000 - More on tubeless tyres
  • The frame is built with Giant's lighter weight ALUXX SL Grade alloy tubing
  • Proper trail geometry
  • The slack 67˚ head tube angle improves stability for confident downhilling
  • The steep-ish 73.5˚ seat tube angle makes it easier to ride out the saddle and boost yourself up climbs

Here's how Giant describe the Fathom 1


With its lightweight ALUXX SL aluminum frame and trail-friendly geometry, Fathom is a great choice for XC terrain and singletrack shredding. It blends the efficient ride quality of a classic hardtail with the can-do capabilities of an all-round off-roader. Engineered to optimize its 27.5 wheel platform, it has trail-friendly geometry including a more relaxed head angle made for a 120mm suspension fork. Tubeless ready.

  • ALUXX SL-grade aluminum frame
  • SR Suntour Axon LO-RC 120mm-travel fork with 15mm thru-axle
  • Shimano SLX 1x11 speed drivetrain
  • Shimano M365 hydraulic disc brakes
  • Giant XC-1 Disc wheelset with Maxxis Ardent tubeless tyres
  • Colour: Satin/Blue/Black

Mountain Bike Sizing Guide.

Bike sizing guide by brand.


See all Mountain Bikes.

Technical Specifications

Giant Fathom 1 2018 
SizesS, M, L, XL
ColoursSatin Blue / Satin Black / Satin White
FrameALUXX SL-Grade Aluminum
ForkSuntour Axon LO-RC, 120mm Travel, Air Spring, Tapered Alloy Steerer, Low speed Compression and Rebound Adjust, 15x100 axle
HandlebarGiant Connect Trail, 780mm
StemGiant Connect
SeatpostNEW Giant Contact Switch, Dropper post
SaddleGiant Contact (Neutral)
PedalsMTB Caged, 9/16"
ShiftersShimano SLX 11 speed
Rear DerailleurShimano SLX, Shadow +
BrakesShimano M365 [F] 180mm [R] 160mm, Hydraulic Disc
Brake LeversShimano M365
CassetteShimano SLX, 11x46
ChainKMC X11-1
CranksetShimano SLX, 30t
Bottom BracketShimano MT500 PressFit
RimsGiant XC-1 Wheelset, 23mm Inner Width
Hubs[F] Giant Tracker 15x100, Sealed 2 Bearing, [R] Giant Tracker Sport QR, Sealed Bearing
SpokesSapim Race
TyresMaxxis Ardent 27.5x2.25", Folding, 60 TPI, TR, Tubeless with Tyre Sealant
Weight- weighed in our Aberdeen shop March 2018Large Frame: 12.37kg/27.27lb


Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.