2020 Boskey Archer Base

	S	M	L	XL
Stack	535mm	559mm	581mm	621mm
Reach	370mm	375mm	380mm	395mm
Stack to Reach Ratio	1.45:1	1.49:1	1.53:1	1.57:1
Seat Tube Length, C-T	450mm	490mm	530mm	560mm
Top Tube Length, Actual C-C	520mm	540mm	552mm	585mm
Top Tube Slope	11.7deg	9.8deg	7.8deg	8.7deg
Head Tube Angle	70deg	70.5deg	71.5deg	72deg
Seat Tube Angle	74.5deg	73.5deg	73.5deg	73deg
Head Tube Length	110mm	120mm	150mm	190mm
Bottom Bracket Drop	68mm	68mm	68mm	68mm
Bottom Bracket Height	278mm	278mm	278mm	278mm
Chainstay Length	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	419.5mm	419.5mm	419.5mm	419.5mm
Front-Center	589.4mm	596.4mm	604.3mm	622.2mm
Front-Center Horizontal	585.5mm	592.5mm	600.5mm	618.5mm
Wheelbase	1005mm	1012mm	1020mm	1038mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Trail	78.1mm high	74.8mm high	68.3mm high	65.1mm high
Mechanical Trail	73.3mm	70.5mm	64.8mm	61.9mm
Wheel Flop	25.1mm	23.5mm	20.6mm	19.1mm
Tire to Pedal Spindle	73.4mm 170 mm cranks	80.4mm 170 mm cranks	88.3mm 170 mm cranks	106.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	108mm 170 mm cranks	108mm 170 mm cranks	108mm 170 mm cranks	108mm 170 mm cranks

Published Sizing Recommendations

Height

158 cm

169 cm

170 cm

178 cm

179 cm

183 cm

184 cm

190 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://boskeycycle.com/gravel