2021 Polygon Bikes Siskiu D6

	S 27.5"	M 27.5"	M 29"	L 29"	XL 29"
Stack	571.2mm	580.4mm	606.7mm	615.9mm	625.2mm
Reach	425mm	445mm	445mm	465mm	485mm
Stack to Reach Ratio	1.34:1	1.3:1	1.36:1	1.32:1	1.29:1
Seat Tube Length, C-T	395mm	435mm	435mm	487mm	522mm
Top Tube Length, Effective/Horizontal Center	572mm	595mm	603mm	624mm	646mm
Head Tube Angle	67deg	67deg	67deg	67deg	67deg
Effective Seat Tube Angle, Unknown	75deg	75deg	76deg	76deg	76deg
Head Tube Length	102mm	105mm	102mm	112mm	122mm
Bottom Bracket Drop	27mm	27mm	47mm	47mm	47mm
Bottom Bracket Height	322.2mm	322.2mm	321.2mm	321.2mm	321.2mm
Chainstay Length	432mm	432mm	436mm	436mm	436mm
Chainstay Length Horizontal	431.2mm	431.2mm	433.5mm	433.5mm	433.5mm
Front-Center	702.4mm	726.4mm	733.1mm	757mm	781mm
Front-Center Horizontal	701.8mm	725.8mm	731.5mm	755.5mm	779.5mm
Wheelbase	1133mm	1157mm	1165mm	1189mm	1213mm
Fork Offset/Rake	42mm	42mm	46mm	46mm	46mm
Trail	102.6mm very high	102.6mm very high	106.3mm very high	106.3mm very high	106.3mm very high
Mechanical Trail	94.4mm	94.4mm	97.9mm	97.9mm	97.9mm
Wheel Flop	36.9mm	36.9mm	38.2mm	38.2mm	38.2mm
Standover Height	676mm	696mm	698mm	733mm	761mm
Tire to Pedal Spindle	183.2mm 170 mm cranks	207.2mm 170 mm cranks	194.9mm 170 mm cranks	213.9mm 175 mm cranks	237.8mm 175 mm cranks
Pedal Spindle to Ground Clearance	152.2mm 170 mm cranks	152.2mm 170 mm cranks	151.2mm 170 mm cranks	146.2mm 175 mm cranks	146.2mm 175 mm cranks

Published Sizing Recommendations

Height

155 cm

168 cm

177 cm

171 cm

180 cm

188 cm

196 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.bicyclesonline.com.au/2021-polygon-siskiu-d6-dual-suspension-mountain-bi