2019 Sour Bicycles Crumble Base M 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
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Geometry
| Stack | 602.5mm |
| Reach | 465.6mm |
| Stack to Reach Ratio | 1.29:1 |
| Seat Tube Length, C-T | 410mm |
| Top Tube Length, Effective/Horizontal Center | 610mm |
| Top Tube Slope | 19.8deg |
| Head Tube Angle | 67deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 48mm |
| Bottom Bracket Height | 305mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 422.3mm |
| Front-Center | 749.3mm |
| Front-Center Horizontal | 747.7mm |
| Wheelbase | 1170mm |
| Fork Offset/Rake | 43mm |
| Trail | 103.1mm very high |
| Mechanical Trail | 94.9mm |
| Wheel Flop | 37.1mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 226.3mm |
| 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 | 1875.9mm |
| 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