2025 Sour Bicycles Purple Haze Base S
Build
650B/27.5 in × 55 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Sour Bicycles Purple Haze
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 554.5mm |
| Reach | 378.2mm |
| Stack to Reach Ratio | 1.47:1 |
| Seat Tube Length, Unknown | 495mm |
| Top Tube Length, Effective/Horizontal Unknown | 532mm |
| Top Tube Slope | 8.6deg |
| Head Tube Angle | 70.5deg |
| Seat Tube Angle | 74.5deg |
| Head Tube Length | 135mm |
| Bottom Bracket Drop | 52mm |
| Bottom Bracket Height | 295mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 436.9mm |
| Front-Center | 599.3mm |
| Front-Center Horizontal | 597.1mm |
| Wheelbase | 1034mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 405mm |
| Trail | 75.1mm high |
| Mechanical Trail | 70.8mm |
| Wheel Flop | 23.6mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 82.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 125mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 55mm |
| Tire Outer Diameter | 694mm |
| Bike Length with Tires | 1728mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://sour.bike/bikes/gravel/purple-haze/