1989 Bianchi Grizzly Base

	16”	17.5”	19.5”	21.5”	22.5”
Stack	388.9mm	425.4mm	474mm	522.5mm	546.8mm
Reach	409.8mm	418.7mm	421.8mm	424mm	431.5mm
Stack to Reach Ratio	0.95:1	1.02:1	1.12:1	1.23:1	1.27:1
Seat Tube Length, C-T	406.4mm	444.5mm	495.3mm	546.1mm	571.5mm
Top Tube Length, Effective/Horizontal Center	530mm	550mm	568mm	585mm	600mm
Top Tube Length, Actual C-C	530mm	550mm	568mm	585mm	600mm
Top Tube Slope	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	71deg	71deg	71deg	71deg	71deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg
Bottom Bracket Drop	32mm	35mm	35mm	35mm	35mm
Bottom Bracket Height	295.8mm	292.8mm	292.8mm	292.8mm	292.8mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	428.8mm	428.6mm	428.6mm	428.6mm	428.6mm
Front-Center	609mm	626.4mm	634.4mm	646.4mm	662.4mm
Front-Center Horizontal	608.2mm	625.4mm	633.4mm	645.4mm	661.4mm
Wheelbase	1037mm	1054mm	1062mm	1074mm	1090mm
Fork Offset/Rake	50mm	50mm	50mm	50mm	50mm
Trail	60mm mid/neutral	60mm mid/neutral	60mm mid/neutral	60mm mid/neutral	60mm mid/neutral
Mechanical Trail	56.7mm	56.7mm	56.7mm	56.7mm	56.7mm
Wheel Flop	18.5mm	18.5mm	18.5mm	18.5mm	18.5mm
Standover Height	—	—	781.1mm	—	—
Tire to Pedal Spindle	111.3mm 170 mm cranks	128.7mm 170 mm cranks	136.6mm 170 mm cranks	148.6mm 170 mm cranks	164.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	125.8mm 170 mm cranks	122.8mm 170 mm cranks	122.8mm 170 mm cranks	122.8mm 170 mm cranks	122.8mm 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