2025 Black Mountain Cycles Mod.Zero Base 47cm
Build
650B/27.5 in × 45 mm
Insights
Very upright stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 588mm |
| Reach | 366mm |
| Stack to Reach Ratio | 1.61:1 |
| Seat Tube Length, C-T | 470mm |
| Top Tube Length, Effective/Horizontal Unknown | 540mm |
| Top Tube Slope | 15.4deg |
| Head Tube Angle | 71.5deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 140mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 265mm |
| Chainstay Length | 438mm |
| Chainstay Length Horizontal | 432mm |
| Front-Center | 601mm |
| Front-Center Horizontal | 597mm |
| Wheelbase | 1029mm |
| Fork Offset/Rake | 55mm |
| Fork Length, Unknown | 410mm |
| Trail | 54.8mm mid/neutral |
| Mechanical Trail | 51.9mm |
| Wheel Flop | 16.5mm |
| Standover Height | 778mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 94mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 95mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 674mm |
| Bike Length with Tires | 1703mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://blackmtncycles.com/info/frame-geometry-charts/