1989 Bianchi Super Grizzly Base

	17.5”	19.5”	21”	22.5”
Stack	425.4mm	474mm	510.4mm	546.8mm
Reach	418.7mm	423.8mm	427.7mm	431.5mm
Stack to Reach Ratio	1.02:1	1.12:1	1.19:1	1.27:1
Seat Tube Length, C-T	444.5mm	495.3mm	533.4mm	571.5mm
Top Tube Length, Effective/Horizontal Center	550mm	570mm	585mm	600mm
Top Tube Length, Actual C-C	550mm	570mm	585mm	600mm
Top Tube Slope	0deg	0deg	0deg	0deg
Head Tube Angle	71deg	71deg	71deg	71deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Bottom Bracket Drop	10mm	36mm	45mm	45mm
Bottom Bracket Height	320.3mm	294.3mm	285.3mm	285.3mm
Chainstay Length	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	429.9mm	428.5mm	427.6mm	427.6mm
Front-Center	631.2mm	637.5mm	650.9mm	667.9mm
Front-Center Horizontal	631.1mm	636.5mm	649.4mm	666.4mm
Wheelbase	1061mm	1065mm	1077mm	1094mm
Fork Offset/Rake	50mm	50mm	50mm	50mm
Trail	60.9mm mid/neutral	60.9mm mid/neutral	60.9mm mid/neutral	60.9mm mid/neutral
Mechanical Trail	57.5mm	57.5mm	57.5mm	57.5mm
Wheel Flop	18.7mm	18.7mm	18.7mm	18.7mm
Tire to Pedal Spindle	130.9mm 170 mm cranks	137.2mm 170 mm cranks	150.6mm 170 mm cranks	167.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	150.3mm 170 mm cranks	124.3mm 170 mm cranks	115.3mm 170 mm cranks	115.3mm 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:1989 Bianchi Catalog

Geometry