2023 Polygon Bikes Helios A7X Base

	XXS	XS	S	M	L	XL
Stack	505mm	520.2mm	535.2mm	550.4mm	564.7mm	580.8mm
Reach	370mm	375mm	380mm	385mm	390mm	395mm
Stack to Reach Ratio	1.36:1	1.39:1	1.41:1	1.43:1	1.45:1	1.47:1
Seat Tube Length, C-T	450mm	475mm	500mm	520mm	545mm	570mm
Top Tube Length, Effective/Horizontal Center	505.3mm	517.3mm	530.4mm	543mm	555.1mm	569.3mm
Top Tube Slope	8.2deg	7.1deg	6deg	5.5deg	4.4deg	3.6deg
Head Tube Angle	71.5deg	71.8deg	72deg	72.3deg	72.3deg	72.8deg
Seat Tube Angle	75deg	74.7deg	74.3deg	74deg	73.7deg	73.3deg
Head Tube Length	100mm	115mm	130mm	145mm	160mm	175mm
Bottom Bracket Drop	68mm	68mm	68mm	68mm	68mm	68mm
Bottom Bracket Height	271mm	271mm	271mm	271mm	271mm	271mm
Chainstay Length	415mm	415mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	409.4mm	409.4mm	409.4mm	409.4mm	409.4mm	409.4mm
Front-Center	563.2mm	570.5mm	578.5mm	585.7mm	595.1mm	600.3mm
Front-Center Horizontal	559mm	566.4mm	574.5mm	581.7mm	591.2mm	596.4mm
Wheelbase	968.4mm	975.8mm	983.9mm	991.1mm	1000.6mm	1005.8mm
Fork Offset/Rake	40.6mm	40.6mm	40.6mm	40.7mm	40.7mm	40.8mm
Trail	70.6mm high	68.7mm high	67.4mm high	65.4mm high	65.5mm high	62.3mm mid/neutral
Mechanical Trail	67mm	65.3mm	64.1mm	62.3mm	62.4mm	59.5mm
Wheel Flop	21.3mm	20.4mm	19.8mm	19mm	19mm	17.6mm
Standover Height	716mm	739.4mm	763.2mm	780.8mm	802.5mm	824.3mm
Tire to Pedal Spindle	54.2mm 170 mm cranks	61.5mm 170 mm cranks	69.5mm 170 mm cranks	76.7mm 170 mm cranks	83.6mm 172.5 mm cranks	88.8mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	98.5mm 172.5 mm cranks	98.5mm 172.5 mm cranks

	XXS	XS	S	M	L	XL
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm
Tire Width Max	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1646.4mm	1653.8mm	1661.9mm	1669.1mm	1678.6mm	1683.8mm
Crank Length	170mm	170mm	170mm	170mm	172.5mm	172.5mm
Handlebar Width	400mm	400mm	400mm	420mm	420mm	420mm
Stem Length	100mm	100mm	100mm	110mm	110mm	110mm
Stem Angle	0deg	0deg	0deg	0deg	0deg	0deg

Published Sizing Recommendations

Height

158 cm

164 cm

163 cm

168 cm

166 cm

174 cm

172 cm

180 cm

178 cm

186 cm

184 cm

192 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.

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Source:https://www.bikesonline.com.au/polygon-helios-a7x