1991 Bridgestone Cycle Co. RB-1 Base

	50cm	53cm	56cm	59cm	62cm
Stack	497.2mm	524.9mm	552.4mm	579.7mm	608.3mm
Reach	381.5mm	389.2mm	396.5mm	403.2mm	409.5mm
Stack to Reach Ratio	1.3:1	1.35:1	1.39:1	1.44:1	1.49:1
Seat Tube Length, C-T	500mm	530mm	560mm	590mm	620mm
Seat Tube Length, C-C	482.5mm	512.5mm	542.5mm	572.5mm	602.5mm
Top Tube Length, Effective/Horizontal Center	525mm	545mm	565mm	585mm	600mm
Top Tube Length, Actual C-C	525mm	545mm	565mm	585mm	600mm
Top Tube Slope	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	72.5deg	73deg	73.5deg	74deg	74.5deg
Seat Tube Angle	74deg	73.5deg	73deg	72.5deg	72.5deg
Bottom Bracket Drop	75mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	266mm	271mm	271mm	271mm	271mm
Chainstay Length	410mm	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	403.1mm	404mm	404mm	404mm	404mm
Front-Center	574mm	580mm	590mm	595mm	604mm
Front-Center Horizontal	569.9mm	575mm	586mm	591mm	600mm
Wheelbase	973mm	979mm	990mm	995mm	1004mm
Fork Offset/Rake	50mm	45mm	45mm	40mm	40mm
Trail	55.1mm mid/neutral	57.2mm mid/neutral	54.1mm mid/neutral	56.2mm mid/neutral	53.1mm mid/neutral
Mechanical Trail	52.5mm	54.7mm	51.9mm	54mm	51.1mm
Wheel Flop	15.8mm	16mm	14.7mm	14.9mm	13.7mm
Standover Height	743mm	773mm	800mm	828mm	856mm
Tire to Pedal Spindle	63mm 170 mm cranks	69mm 170 mm cranks	79mm 170 mm cranks	84mm 170 mm cranks	93mm 170 mm cranks
Pedal Spindle to Ground Clearance	96mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 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:http://farm4.static.flickr.com/3186/2719995297_cbd42cb8ed_o.jpg

Geometry