2021 Giant Bicycles Fathom 1 XL

Build

650B/27.5 in × 2.6 in

Insights

Average stack and reach vs trend of hardtail trail mtb bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
640mm
Reach
490mm
Stack to Reach Ratio
1.31:1
Seat Tube Length, C-T
495mm
Top Tube Length, Effective/Horizontal Unknown
662mm
Head Tube Angle
66deg
Effective Seat Tube Angle, Seat Tube Top
75deg
Head Tube Length
115mm
Bottom Bracket Drop
60mm
Bottom Bracket Height
298mm
Chainstay Length
435mm
Chainstay Length Horizontal
430.8mm
Front-Center
798.4mm
Front-Center Horizontal
796.2mm
Wheelbase
1227mm
Fork Offset/Rake
44mm
Trail
111.3mm
very high
Mechanical Trail
101.6mm
Wheel Flop
41.3mm
Standover Height
771mm
Tire to Pedal Spindle Distance
With 170 mm cranks
270.4mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
128mm

1 Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
2.6in
Tire Outer Diameter
716.1mm
Bike Length with Tires
1943.1mm
Crank Length
170mm
Handlebar Width
780mm
Stem Length
50mm
Suspension Type
Hardtail (Front suspension)
Bar Type
Flat Bar
Fork Travel
130mm
Suspension Sag
Unknown
Frame Material
Aluminum
Fork Material
N/A
Brake Type
Disc

Published Sizing Recommendations

Height
187 cm
to
198 cm
Source:https://www.giant-bicycles.com/us/fathom-1-2021