2021 CHIRU Chilkoot Base

	S	M	L	XL
Stack	548mm	568mm	588mm	608mm
Reach	375mm	381mm	387mm	394mm
Stack to Reach Ratio	1.46:1	1.49:1	1.52:1	1.54:1
Seat Tube Length, C-T	500mm	525mm	535mm	575mm
Top Tube Length, Effective/Horizontal Center	530mm	550mm	565mm	580mm
Top Tube Slope	7.5deg	7deg	8deg	5.9deg
Head Tube Angle	70.7deg	71deg	71.3deg	71.5deg
Seat Tube Angle	74.2deg	73.4deg	73.2deg	73deg
Head Tube Length	130mm	150mm	170mm	190mm
Bottom Bracket Drop	66mm	66mm	66mm	66mm
Bottom Bracket Height	285mm	285mm	285mm	285mm
Chainstay Length	423mm	423mm	423mm	423mm
Chainstay Length Horizontal	417.8mm	417.8mm	417.8mm	417.8mm
Front-Center	594.9mm	604.8mm	615.7mm	626.7mm
Front-Center Horizontal	591.2mm	601.2mm	612.2mm	623.2mm
Wheelbase	1009mm	1019mm	1030mm	1041mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	395mm	395mm	395mm	395mm
Trail	75.2mm high	73.3mm high	71.3mm high	70mm high
Mechanical Trail	71mm	69.3mm	67.5mm	66.4mm
Wheel Flop	23.5mm	22.6mm	21.7mm	21.1mm
Tire to Pedal Spindle	73.9mm 170 mm cranks	83.8mm 170 mm cranks	94.7mm 170 mm cranks	105.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	115mm 170 mm cranks	115mm 170 mm cranks	115mm 170 mm cranks	115mm 170 mm cranks

Published Sizing Recommendations

Height

163 cm

172 cm

170 cm

180 cm

178 cm

190 cm

188 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:http://www.chirubikes.com/frames-chilkoot