2026 Sour Bicycles Purple Pie Pinion SM
Build
700C/29 in × 50 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 554.4mm |
| Reach | 378.2mm |
| Stack to Reach Ratio | 1.47:1 |
| Seat Tube Length, C-T | 480mm |
| Top Tube Length, Effective/Horizontal HT Top | 532mm |
| Top Tube Slope | 10.3deg |
| Head Tube Angle | 70.5deg |
| Seat Tube Angle | 74.5deg |
| Head Tube Length | 135mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 289mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.1mm |
| Front-Center | 604.2mm |
| Front-Center Horizontal | 599.9mm |
| Wheelbase | 1034mm |
| Fork Offset/Rake | 45mm |
| Fork Length (On-Axis) | 405mm |
| Trail | 80.1mm very high |
| Mechanical Trail | 75.5mm |
| Wheel Flop | 25.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 73.2mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 119mm |
Pinion Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 50mm |
| Tire Outer Diameter | 722mm |
| Bike Length with Tires | 1756mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://sour.bike/bikes/gravel/purple-pie/