2025 Sour Bicycles Clueless Base S
Build
650B/27.5 in × 37 mm
Insights
Average stack and reach vs trend of endurance road bikes
Design deviates from other sizes of Sour Bicycles Clueless
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 559.4mm |
| Reach | 374.6mm |
| Stack to Reach Ratio | 1.49:1 |
| Seat Tube Length, C-T | 520mm |
| Top Tube Length, Effective/Horizontal HT Top | 535mm |
| Top Tube Slope | 6.6deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 140mm |
| Bottom Bracket Drop | 56mm |
| Bottom Bracket Height | 273mm |
| Chainstay Length | 426mm |
| Chainstay Length Horizontal | 422.3mm |
| Front-Center | 588.2mm |
| Front-Center Horizontal | 585.5mm |
| Wheelbase | 1007.8mm |
| Fork Offset/Rake | 45mm |
| Fork Length, Unknown | 400mm |
| Trail | 59.6mm mid/neutral |
| Mechanical Trail | 56.7mm |
| Wheel Flop | 17.5mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 89.2mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 103mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 37mm |
| Tire Outer Diameter | 658mm |
| Bike Length with Tires | 1665.8mm |
| 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/road/clueless/