2018 Specialized Bicycles Stumpjumper Comp Alloy 27.5 S
Build
650B/27.5 in × 2.6 in
Insights
Average stack and reach vs trend of full-suspension trail mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 590mm |
| Reach | 388mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, Unknown | 396mm |
| Top Tube Length, Effective/Horizontal Center | 553mm |
| Top Tube Slope | 22.8deg |
| Head Tube Angle | 67deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 105mm |
| Bottom Bracket Drop | 18mm |
| Bottom Bracket Height | 340mm |
| Chainstay Length | 420mm |
| Chainstay Length Horizontal | 419.6mm |
| Front-Center | 677mm |
| Front-Center Horizontal | 676.4mm |
| Wheelbase | 1096mm |
| Fork Offset/Rake | 46mm |
| Fork Length, Unknown | 542mm |
| Trail | 102mm very high |
| Mechanical Trail | 93.9mm |
| Wheel Flop | 36.7mm |
| Standover Height | 742mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 149mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 170mm |
Comp Alloy 27.5 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 716.1mm |
| Bike Length with Tires | 1812.1mm |
| Crank Length | 170mm |
| Handlebar Width | 780mm |
| Stem Length | 45mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 150mm |
| Rear Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | N/A |
| Brake Type | Unknown |
Source:https://www.specialized.com/us/en/stumpjumper-comp-alloy-27-5/p/153985