2025 Rivendell Bicycle Works Atlantis Base 50
Build
650B/27.5 in × 48 mm
Insights
Very aggressive stack and reach vs trend of off-road touring bikes
Design deviates from other sizes of Rivendell Bicycle Works Atlantis
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 566mm |
| Reach | 389mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-T | 500mm |
| Top Tube Length, Effective/Horizontal Center | 575mm |
| Top Tube Length, Actual C-C | 559.1mm |
| Top Tube Slope | 6deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 72deg |
| Bottom Bracket Drop | 68mm |
| Bottom Bracket Height | 272mm |
| Chainstay Length | 520mm |
| Chainstay Length Horizontal | 515.5mm |
| Front-Center | 638.1mm |
| Front-Center Horizontal | 634.5mm |
| Wheelbase | 1150mm |
| Fork Offset/Rake | 60.3mm |
| Trail | 59.5mm mid/neutral |
| Mechanical Trail | 56mm |
| Wheel Flop | 19.1mm |
| Standover Height | 780mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 128.1mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 102mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 48mm |
| Tire Outer Diameter | 680mm |
| Bike Length with Tires | 1830mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Swept Back Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:https://cdn.shopify.com/s/files/1/1403/7343/files/RBW_Bicycle_Geometries_August_2025.pdf?v=1755816394