2020 Genesis Bikes Datum Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Carbon/Composite
Fork
Carbon/Composite
Features
Disc brake
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

XS
S
M
L
XL
Stack
544mm
563mm
585mm
602mm
621mm
Reach
365mm
375mm
385mm
395mm
405mm
Stack to Reach Ratio
1.49:1
1.5:1
1.52:1
1.52:1
1.53:1
Seat Tube Length, C-T
460mm
490mm
520mm
540mm
570mm
Top Tube Length, Effective/Horizontal HT Top
526mm
542mm
561mm
579mm
595mm
Top Tube Slope
11.7deg
10.3deg
9.3deg
8.8deg
7.6deg
Head Tube Angle
72deg
72deg
72deg
72deg
72deg
Seat Tube Angle
73.5deg
73.5deg
73.25deg
73deg
73deg
Head Tube Length
115mm
135mm
155mm
175mm
195mm
Bottom Bracket Drop
72mm
72mm
72mm
72mm
72mm
Bottom Bracket Height
271mm
271mm
271mm
271mm
271mm
Chainstay Length
420mm
420mm
420mm
420mm
420mm
Chainstay Length Horizontal
413.8mm
413.8mm
413.8mm
413.8mm
413.8mm
Front-Center
575.7mm
591.6mm
607.5mm
623.4mm
640.3mm
Front-Center Horizontal
571.2mm
587.2mm
603.2mm
619.2mm
636.2mm
Wheelbase
985mm
1001mm
1017mm
1033mm
1050mm
Fork Offset/Rake
50mm
50mm
50mm
50mm
50mm
Trail
58.9mm
mid/​neutral
58.9mm
mid/​neutral
58.9mm
mid/​neutral
58.9mm
mid/​neutral
58.9mm
mid/​neutral
Mechanical Trail
56mm
56mm
56mm
56mm
56mm
Wheel Flop
17.3mm
17.3mm
17.3mm
17.3mm
17.3mm
Standover Height
752mm
777mm
801mm
816mm
839mm
Tire to Pedal Spindle
62.7mm
170 mm cranks
76.1mm
172.5 mm cranks
92mm
172.5 mm cranks
105.4mm
175 mm cranks
122.3mm
175 mm cranks
Pedal Spindle to Ground Clearance
101mm
170 mm cranks
98.5mm
172.5 mm cranks
98.5mm
172.5 mm cranks
96mm
175 mm cranks
96mm
175 mm cranks

Base Build

XS
S
M
L
XL
Wheel Size
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
Tire Width
32mm
32mm
32mm
32mm
32mm
Tire Outer Diameter
686mm
686mm
686mm
686mm
686mm
Bike Length with Tires
1671mm
1687mm
1703mm
1719mm
1736mm
Crank Length
170mm
172.5mm
172.5mm
175mm
175mm
Handlebar Width
400mm
420mm
420mm
440mm
440mm
Stem Length
90mm
100mm
100mm
110mm
110mm

Published Sizing Recommendations

Height
158 cm
to
165 cm
164 cm
to
171 cm
170 cm
to
177 cm
176 cm
to
183 cm
182 cm
to
191 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
All-road/Gravel
Source:https://www.genesisbikes.co.uk/bike/datum