2012 Specialized Bicycles Hardrock Base 15.5
Build
700C/29 in × 2 in
Insights
Somewhat upright stack and reach vs trend of hardtail trail mtb bikes
Design deviates from other sizes of Specialized Bicycles Hardrock
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 622mm |
| Reach | 395mm |
| Stack to Reach Ratio | 1.57:1 |
| Seat Tube Length, C-T | 394mm |
| Top Tube Length, Effective/Horizontal Unknown | 574mm |
| Top Tube Length, Actual C-C | 555mm |
| Top Tube Slope | 25.7deg |
| Head Tube Angle | 70.5deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 68.5mm |
| Bottom Bracket Height | 293.3mm |
| Chainstay Length | 450mm |
| Chainstay Length Horizontal | 444.8mm |
| Front-Center | 641.9mm |
| Front-Center Horizontal | 638.2mm |
| Wheelbase | 1083mm |
| Fork Offset/Rake | 44.5mm |
| Trail | 80.9mm very high |
| Mechanical Trail | 76.2mm |
| Wheel Flop | 25.5mm |
| Standover Height | 710mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 110.1mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 123.3mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2in |
| Tire Outer Diameter | 723.6mm |
| Bike Length with Tires | 1806.6mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 80mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
Source:https://www.specialized.com/us/en/hardrock-sport-disc-29/p/35007?color=79776-35007