1989 Specialized Bicycles Rock Combo Base 19 1/2
Build
26 in × 1.5 in
Insights
Very aggressive stack and reach vs trend of off-road touring bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 494.4mm |
| Reach | 423.2mm |
| Stack to Reach Ratio | 1.17:1 |
| Seat Tube Length, C-TTT | 498mm |
| Top Tube Length, Effective/Horizontal Center | 580mm |
| Top Tube Length, Actual C-C | 580mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 72.5deg |
| Bottom Bracket Drop | 55.5mm |
| Bottom Bracket Height | 262.1mm |
| Chainstay Length | 434mm |
| Chainstay Length Horizontal | 430.4mm |
| Front-Center | 635mm |
| Front-Center Horizontal | 632.6mm |
| Wheelbase | 1063mm |
| Fork Offset/Rake | 43mm |
| Trail | 63.9mm mid/neutral |
| Mechanical Trail | 60.4mm |
| Wheel Flop | 19.7mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 147.4mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 92.1mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 1.5in |
| Tire Outer Diameter | 635.2mm |
| Bike Length with Tires | 1698.2mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:http://forums.mtbr.com/attachments/vintage-retro-classic/71198d1113966853-specialized-rock-combo-articles-specifications-rock-combo003-copy.jpg