2018 Ritchey Design P-650B Base XL (21")
Build
650B/27.5 in × 2.25 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail cross-country mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 611mm |
| Reach | 447mm |
| Stack to Reach Ratio | 1.37:1 |
| Seat Tube Length, C-T | 533mm |
| Top Tube Length, Effective/Horizontal Center | 635mm |
| Top Tube Length, Actual C-C | 612mm |
| Top Tube Slope | 9.9deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 145mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 299.2mm |
| Chainstay Length | 432mm |
| Chainstay Length Horizontal | 429.1mm |
| Front-Center | 697.7mm |
| Front-Center Horizontal | 695.9mm |
| Wheelbase | 1125mm |
| Fork Offset/Rake | 42mm |
| Fork Length (Axle-To-Crown) | 459mm |
| Trail | 82.4mm very high |
| Mechanical Trail | 77.4mm |
| Wheel Flop | 26.5mm |
| Standover Height | 826mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 178.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 129.2mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 698.3mm |
| Bike Length with Tires | 1823.3mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Steel |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://us.ritcheylogic.com/media/itm/magb1/Productfiles/97450008002/1521470425_ritchey-p650b-geometry.pdf