2021 Sour Bicycles Crumble Base S 27,5''
Build
650B/27.5 in × 2.5 in
Insights
Average 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 | 630mm |
| Reach | 440mm |
| Stack to Reach Ratio | 1.43:1 |
| Seat Tube Length, Unknown | 370mm |
| Top Tube Length, Effective/Horizontal Unknown | 590mm |
| Top Tube Slope | 27deg |
| Head Tube Angle | 66deg |
| Seat Tube Angle | 75.5deg |
| Head Tube Length | 95mm |
| Bottom Bracket Drop | 48mm |
| Bottom Bracket Height | 307.5mm |
| Chainstay Length | 415mm |
| Chainstay Length Horizontal | 412.2mm |
| Front-Center | 750.3mm |
| Front-Center Horizontal | 748.8mm |
| Wheelbase | 1161mm |
| Fork Offset/Rake | 51mm |
| Fork Length, Unknown | 515mm |
| Trail | 102.5mm very high |
| Mechanical Trail | 93.6mm |
| Wheel Flop | 38.1mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 224.8mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 137.5mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.5in |
| Tire Outer Diameter | 711mm |
| Bike Length with Tires | 1872mm |
| 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/candy-shop/bikes/crumble/