2020 Genesis Bikes Datum Base

	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

Published Sizing Recommendations

Height

158 cm

165 cm

164 cm

171 cm

170 cm

177 cm

176 cm

183 cm

182 cm

191 cm

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.

Category Trend

Source:https://www.genesisbikes.co.uk/bike/datum