1989 Bridgestone Cycle Co. RB-1 Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Steel
Fork
Steel
Features
Rim brake
Somewhat aggressive stack and reachvs category
Average stack and reachvs category
Somewhat aggressive stack and reachvs category
Average stack and reachvs category
Very upright stack and reachvs category

Geometry

51cm
53cm
56cm
59cm
63cm
48cm
Stack
507.4mm
526.7mm
554.5mm
580.6mm
618.8mm
Reach
382.7mm
377.4mm
395.4mm
392.8mm
391.1mm
Stack to Reach Ratio
1.33:1
1.4:1
1.4:1
1.48:1
1.58:1
Seat Tube Length, C-T
510mm
530mm
560mm
590mm
630mm
480mm
Seat Tube Length, C-C
492mm
512mm
542mm
572mm
612mm
462mm
Top Tube Length, Effective/Horizontal Center
525mm
525mm
555mm
570mm
580mm
Top Tube Length, Actual C-C
525mm
525mm
555mm
570mm
580mm
510mm
Top Tube Slope
0deg
0deg
0deg
0deg
0deg
Head Tube Angle
72deg
72deg
73deg
73.5deg
73.5deg
71.5deg
Seat Tube Angle
74.5deg
74.5deg
74deg
73deg
73deg
74.5deg
Bottom Bracket Drop
75mm
70mm
70mm
70mm
65mm
70mm
Bottom Bracket Height
261mm
266mm
266mm
266mm
271mm
266mm
Chainstay Length
415mm
415mm
415mm
415mm
415mm
415mm
Chainstay Length Horizontal
408.2mm
409.1mm
409.1mm
409.1mm
409.9mm
409.1mm
Front-Center
582mm
583mm
595mm
600mm
606mm
573mm
Front-Center Horizontal
578.8mm
578mm
591mm
596mm
602.1mm
569mm
Wheelbase
987mm
987mm
1000mm
1005mm
1012mm
978mm
Fork Offset/Rake
50mm
50mm
45mm
45mm
45mm
50mm
Trail
56.6mm
mid/​neutral
56.6mm
mid/​neutral
55.7mm
mid/​neutral
52.6mm
mid/​neutral
52.6mm
mid/​neutral
59.7mm
mid/​neutral
Mechanical Trail
53.8mm
53.8mm
53.2mm
50.4mm
50.4mm
56.6mm
Wheel Flop
16.6mm
16.6mm
15.6mm
14.3mm
14.3mm
18mm
Standover Height
754.4mm
772.2mm
800.1mm
828mm
871.2mm
723.9mm
Tire to Pedal Spindle
76mm
170 mm cranks
77mm
170 mm cranks
89mm
170 mm cranks
94mm
170 mm cranks
100mm
170 mm cranks
67mm
170 mm cranks
Pedal Spindle to Ground Clearance
91mm
170 mm cranks
96mm
170 mm cranks
96mm
170 mm cranks
96mm
170 mm cranks
101mm
170 mm cranks
96mm
170 mm cranks

Base Build

51cm
53cm
56cm
59cm
63cm
48cm
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
25mm
25mm
25mm
25mm
25mm
25mm
Tire Outer Diameter
672mm
672mm
672mm
672mm
672mm
672mm
Bike Length with Tires
1659mm
1659mm
1672mm
1677mm
1684mm
1650mm

Stack and Reach vs. Category Trend

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.

Learn more about the Upright/Aggressive Scale
Category Trend
Performance Road
Source:https://www.sheldonbrown.com/bridgestone/1989/index.htm