2021 Cotic Tonic Base

	XS	Small	Medium	Large
Stack	555.1mm	563.8mm	580.1mm	598.1mm
Reach	360.6mm	370.1mm	382.9mm	397mm
Stack to Reach Ratio	1.54:1	1.52:1	1.52:1	1.51:1
Seat Tube Length, C-T	450mm	480mm	510mm	540mm
Top Tube Length, Actual C-C	525mm	537mm	560mm	580mm
Top Tube Slope	14.2deg	11.6deg	9.9deg	8.4deg
Head Tube Angle	71deg	71.5deg	72deg	72deg
Seat Tube Angle	73.5deg	73.5deg	73deg	73deg
Head Tube Length	128mm	135mm	150mm	170mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm
Bottom Bracket Height	276mm	276mm	276mm	276mm
Chainstay Length	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	419.2mm	419.2mm	419.2mm	419.2mm
Front-Center	576.1mm	584mm	595.9mm	619.8mm
Front-Center Horizontal	571.8mm	579.8mm	591.8mm	615.8mm
Wheelbase	991mm	999mm	1011mm	1035mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Fork Length, Unknown	400mm	400mm	400mm	400mm
Trail	71.5mm high	68.3mm high	65.1mm high	65.1mm high
Mechanical Trail	67.7mm	64.8mm	61.9mm	61.9mm
Wheel Flop	22mm	20.6mm	19.1mm	19.1mm
Tire to Pedal Spindle	60.1mm 170 mm cranks	68mm 170 mm cranks	79.9mm 170 mm cranks	103.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	106mm 170 mm cranks	106mm 170 mm cranks	106mm 170 mm cranks

Published Sizing Recommendations

Height

155 cm

166 cm

165 cm

175 cm

173 cm

180 cm

191 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.cotic.co.uk/product/tonic#sizing