2018 Ritchey Design P-650B Base S (15")
Build
650B/27.5 in × 2.25 in
Insights
Very 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 | 567mm |
| Reach | 411mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 381mm |
| Top Tube Length, Effective/Horizontal Center | 580mm |
| Top Tube Length, Actual C-C | 560mm |
| Top Tube Slope | 23.3deg |
| Head Tube Angle | 69.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 299.2mm |
| Chainstay Length | 432mm |
| Chainstay Length Horizontal | 429.1mm |
| Front-Center | 650.8mm |
| Front-Center Horizontal | 648.9mm |
| Wheelbase | 1078mm |
| Fork Offset/Rake | 42mm |
| Fork Length (Axle-To-Crown) | 459mm |
| Trail | 85.7mm very high |
| Mechanical Trail | 80.3mm |
| Wheel Flop | 28.1mm |
| Standover Height | 719mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 131.7mm |
| 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 | 1776.3mm |
| 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