2019 Specialized Bicycles Rockhopper Base S
Build
700C/29 in × 2.1 in
Insights
Average stack and reach vs trend of hardtail cross-country mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 595mm |
| Reach | 395mm |
| Stack to Reach Ratio | 1.51:1 |
| Seat Tube Length, C-T | 400mm |
| Top Tube Length, Effective/Horizontal Center | 568mm |
| Top Tube Slope | 22.6deg |
| Head Tube Angle | 69.8deg |
| Seat Tube Angle | 73.7deg |
| Head Tube Length | 125mm |
| Bottom Bracket Drop | 57.5mm |
| Bottom Bracket Height | 306.8mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 431.2mm |
| Front-Center | 649.4mm |
| Front-Center Horizontal | 646.8mm |
| Wheelbase | 1078mm |
| Fork Offset/Rake | 51mm |
| Fork Length (On-Axis) | 496mm |
| Trail | 79.7mm high |
| Mechanical Trail | 74.8mm |
| Wheel Flop | 25.8mm |
| Standover Height | 750mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 115mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 136.8mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.1in |
| Tire Outer Diameter | 728.7mm |
| Bike Length with Tires | 1806.7mm |
| Crank Length | 170mm |
| Handlebar Width | 720mm |
| Stem Length | 70mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.specialized.com/us/en/mens-rockhopper/p/134064?color=240216-134064