2019 Sour Bicycles Crumble Base S 27,5
Build
650B/27.5 in × 2.4 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail trail mtb bikes
Design deviates from other sizes of Sour Bicycles Crumble
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 598mm |
| Reach | 450mm |
| Stack to Reach Ratio | 1.33:1 |
| Seat Tube Length, C-T | 370mm |
| Top Tube Length, Effective/Horizontal Center | 590mm |
| Top Tube Slope | 23.7deg |
| Head Tube Angle | 67deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 95mm |
| Bottom Bracket Drop | 48mm |
| Bottom Bracket Height | 305mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 422.3mm |
| Front-Center | 740.3mm |
| Front-Center Horizontal | 738.7mm |
| Wheelbase | 1161mm |
| Fork Offset/Rake | 50.9mm |
| Trail | 94.6mm very high |
| Mechanical Trail | 87.1mm |
| Wheel Flop | 34mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 217.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 135mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 705.9mm |
| Bike Length with Tires | 1866.9mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 130mm |
| Suspension Sag | Unknown |
| Frame Material | Steel |
| Fork Material | N/A |
| Brake Type | Disc |
Source:https://sour.bike/shop/rahmen/268/crumble?c=122