Very aggressive stack and reachvs category

Somewhat aggressive stack and reachvs category

Average stack and reachvs category

Somewhat upright stack and reachvs category

Average stack and reachvs category

	19” (485mm)	21” (535mm)	23” (585mm)	25” (635mm)	27” (685mm)
Stack	483.9mm	532mm	580.1mm	627.9mm	676mm
Reach	390.7mm	386.8mm	388.2mm	393.4mm	424.8mm
Stack to Reach Ratio	1.24:1	1.38:1	1.49:1	1.6:1	1.59:1
Seat Tube Length, C-T	485mm	535mm	585mm	635mm	685mm
Seat Tube Length, C-C	470mm	520mm	570mm	620mm	670mm
Top Tube Length, Effective/Horizontal Center	535mm	545mm	560mm	580mm	625mm
Top Tube Length, Actual C-C	535mm	545mm	560mm	580mm	625mm
Top Tube Slope	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	72deg	72.5deg	73.5deg	72.5deg	73.5deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Bottom Bracket Drop	50.1mm	70mm	69.9mm	70mm	69.9mm
Bottom Bracket Height	292.8mm	272.9mm	273.1mm	272.9mm	273.1mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	422mm	419.2mm	419.2mm	419.2mm	419.2mm
Front-Center	588.2mm	586.7mm	594mm	613.7mm	657.7mm
Front-Center Horizontal	586.1mm	582.5mm	589.9mm	609.7mm	654mm
Wheelbase	1008.1mm	1001.7mm	1009.1mm	1028.9mm	1073.2mm
Fork Offset/Rake	50mm	50mm	50mm	50mm	50mm
Trail	58.8mm mid/neutral	55.7mm mid/neutral	49.4mm mid/neutral	55.7mm mid/neutral	49.4mm mid/neutral
Mechanical Trail	56mm	53.1mm	47.4mm	53.1mm	47.4mm
Wheel Flop	17.3mm	16mm	13.5mm	16mm	13.5mm
Tire to Pedal Spindle	75.3mm 170 mm cranks	73.8mm 170 mm cranks	81.1mm 170 mm cranks	100.8mm 170 mm cranks	144.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	122.8mm 170 mm cranks	102.9mm 170 mm cranks	103.1mm 170 mm cranks	102.9mm 170 mm cranks	103.1mm 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

1985 Bridgestone Cycle Co. 400 Base

Geometry