2021 Giant Bicycles Fathom 29 2

Design
Flat Bar, Hardtail (Front suspension)
Frame
Aluminum
Suspension
130mm fork travel
Features
Disc brake
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

S
M
L
XL
Stack
622mm
622mm
631mm
640mm
Reach
425mm
445mm
470mm
490mm
Stack to Reach Ratio
1.46:1
1.4:1
1.34:1
1.31:1
Seat Tube Length, C-T
380mm
430mm
465mm
495mm
Top Tube Length, Effective/Horizontal Unknown
592mm
612mm
639mm
662mm
Head Tube Angle
66deg
66deg
66deg
66deg
Effective Seat Tube Angle, Seat Tube Top
75deg
75deg
75deg
75deg
Head Tube Length
95mm
95mm
105mm
115mm
Bottom Bracket Drop
60mm
60mm
60mm
60mm
Bottom Bracket Height
314.5mm
314.5mm
314.5mm
314.5mm
Chainstay Length
435mm
435mm
435mm
435mm
Chainstay Length Horizontal
430.8mm
430.8mm
430.8mm
430.8mm
Front-Center
725.6mm
745.6mm
774.5mm
798.4mm
Front-Center Horizontal
723.2mm
743.2mm
772.2mm
796.2mm
Wheelbase
1154mm
1174mm
1203mm
1227mm
Fork Offset/Rake
44mm
44mm
44mm
44mm
Trail
118.6mm
very high
118.6mm
very high
118.6mm
very high
118.6mm
very high
Mechanical Trail
108.3mm
108.3mm
108.3mm
108.3mm
Wheel Flop
44.1mm
44.1mm
44.1mm
44.1mm
Standover Height
730mm
745mm
765mm
790mm
Tire to Pedal Spindle
186.1mm
165 mm cranks
201.1mm
170 mm cranks
230mm
170 mm cranks
253.9mm
170 mm cranks
Pedal Spindle to Ground Clearance
149.5mm
165 mm cranks
144.5mm
170 mm cranks
144.5mm
170 mm cranks
144.5mm
170 mm cranks

2 Build

S
M
L
XL
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
2.5in
2.5in
2.5in
2.5in
Tire Outer Diameter
749mm
749mm
749mm
749mm
Bike Length with Tires
1903mm
1923mm
1952mm
1976mm
Crank Length
165mm
170mm
170mm
170mm
Handlebar Width
780mm
780mm
780mm
780mm
Stem Length
40mm
40mm
50mm
50mm

Published Sizing Recommendations

Height
163 cm
to
172 cm
171 cm
to
180 cm
179 cm
to
188 cm
187 cm
to
198 cm

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Category Trend
Hardtail Trail MTB
Source:https://www.giant-bicycles.com/us/fathom-29-2-2021