	C1	C2	C3	C4	C5
Stack	630mm	639mm	648mm	657mm	666mm
Reach	431mm	450mm	469mm	488mm	507mm
Stack to Reach Ratio	1.46:1	1.42:1	1.38:1	1.35:1	1.31:1
Seat Tube Length, C-T	390mm	417mm	444mm	471mm	495mm
Top Tube Length, Effective/Horizontal Center	607mm	629mm	650mm	672mm	693mm
Top Tube Slope	25.4deg	22.9deg	20.5deg	18.3deg	16.5deg
Head Tube Angle	64.4deg	64.4deg	64.4deg	64.4deg	64.4deg
Seat Tube Angle	74.4deg	74.4deg	74.4deg	74.4deg	74.4deg
Head Tube Length	100mm	110mm	120mm	130mm	140mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm	65mm
Bottom Bracket Height	312mm	312mm	312mm	312mm	312mm
Chainstay Length	445mm	445mm	445mm	445mm	445mm
Chainstay Length Horizontal	440.2mm	440.2mm	440.2mm	440.2mm	440.2mm
Front-Center	752.6mm	775.5mm	798.4mm	821.4mm	844.3mm
Front-Center Horizontal	749.8mm	772.8mm	795.8mm	818.8mm	841.8mm
Wheelbase	1190mm	1213mm	1236mm	1259mm	1282mm
Fork Offset/Rake	44mm	44mm	44mm	44mm	44mm
Fork Length, Unknown	534mm	534mm	534mm	534mm	534mm
Trail	131.9mm very high	131.9mm very high	131.9mm very high	131.9mm very high	131.9mm very high
Mechanical Trail	118.9mm	118.9mm	118.9mm	118.9mm	118.9mm
Wheel Flop	51.4mm	51.4mm	51.4mm	51.4mm	51.4mm
Tire to Pedal Spindle	205.6mm 170 mm cranks	228.5mm 170 mm cranks	251.4mm 170 mm cranks	274.3mm 170 mm cranks	297.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	142mm 170 mm cranks	142mm 170 mm cranks	142mm 170 mm cranks	142mm 170 mm cranks	142mm 170 mm cranks

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/BFe

2026 Cotic BFe 160mm Fork

Geometry