	41 cm	44 cm	48 cm	54 cm
Stack	619mm	619mm	628mm	654mm
Reach	398mm	412mm	434mm	440mm
Stack to Reach Ratio	1.56:1	1.5:1	1.45:1	1.49:1
Seat Tube Length, C-T	410mm	440mm	480mm	540mm
Top Tube Length, Effective/Horizontal HT Top	575mm	595mm	620mm	640mm
Top Tube Slope	23.8deg	20.2deg	16.4deg	13deg
Head Tube Angle	70.5deg	70.5deg	70.5deg	71deg
Seat Tube Angle	74deg	73.5deg	73.5deg	73deg
Head Tube Length	95mm	100mm	110mm	140mm
Bottom Bracket Drop	65mm	60mm	60mm	55mm
Bottom Bracket Height	300mm	305mm	305mm	310mm
Chainstay Length	430mm	435mm	435mm	440mm
Chainstay Length Horizontal	425.1mm	430.8mm	430.8mm	436.6mm
Front-Center	646.2mm	660.9mm	686.8mm	696.6mm
Front-Center Horizontal	642.9mm	658.2mm	684.2mm	694.5mm
Wheelbase	1068mm	1089mm	1115mm	1131mm
Fork Offset/Rake	46mm	45.4mm	46.2mm	45.6mm
Trail	80.5mm very high	81.1mm very high	80.2mm very high	77.5mm high
Mechanical Trail	75.9mm	76.4mm	75.6mm	73.3mm
Wheel Flop	25.3mm	25.5mm	25.3mm	23.9mm
Tire to Pedal Spindle	111.2mm 170 mm cranks	125.9mm 170 mm cranks	151.8mm 170 mm cranks	161.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	130mm 170 mm cranks	135mm 170 mm cranks	135mm 170 mm cranks	140mm 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.

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2018 Bulls Black Adder 29

Geometry