2021 Cairn Cycles E-Adventure 1.0 650B Base

	Small	Medium	Large	XLarge
Stack	551mm	570mm	593mm	607mm
Reach	370mm	384mm	393mm	403mm
Stack to Reach Ratio	1.49:1	1.48:1	1.51:1	1.51:1
Seat Tube Length, Unknown	470mm	500mm	530mm	550mm
Top Tube Length, Effective/Horizontal Unknown	553mm	558mm	574mm	588mm
Top Tube Slope	11.3deg	9.8deg	8.9deg	8.2deg
Head Tube Angle	71deg	71deg	72deg	72deg
Seat Tube Angle	73.5deg	73deg	73deg	73deg
Head Tube Length	130mm	150mm	170mm	185mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm
Bottom Bracket Height	279.2mm	279.2mm	279.2mm	279.2mm
Chainstay Length	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	424.3mm	424.3mm	424.3mm	424.3mm
Front-Center	591mm	611mm	617mm	632mm
Front-Center Horizontal	585.7mm	606.7mm	612.7mm	627.7mm
Wheelbase	1010mm	1031mm	1037mm	1052mm
Fork Offset/Rake	48mm	48mm	48mm	48mm
Fork Length, Unknown	398mm	398mm	398mm	398mm
Trail	69.5mm high	69.5mm high	63mm mid/neutral	63mm mid/neutral
Mechanical Trail	65.7mm	65.7mm	59.9mm	59.9mm
Wheel Flop	21.4mm	21.4mm	18.5mm	18.5mm
Standover Height	770mm	790mm	820mm	835mm
Tire to Pedal Spindle	71.9mm 170 mm cranks	91.9mm 170 mm cranks	95.4mm 172.5 mm cranks	110.4mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	109.2mm 170 mm cranks	109.2mm 170 mm cranks	106.7mm 172.5 mm cranks	106.7mm 172.5 mm cranks

Published Sizing Recommendations

Height

158 cm

172 cm

168 cm

182 cm

175 cm

190 cm

180 cm

200 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.cairncycles.com/collections/ebikes-e-adventure/products/cairn-e-adventure-1-0-gravel-bike