2026 Primos Mono Base M
Build
650B/27.5 in × 2.2 in
Insights
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Primos Mono
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 584mm |
| Reach | 391mm |
| Stack to Reach Ratio | 1.49:1 |
| Seat Tube Length, C-T | 453mm |
| Top Tube Length, Effective/Horizontal HT Top | 584mm |
| Top Tube Slope | 16.1deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 72deg |
| Head Tube Length | 163mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 282.9mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 440.2mm |
| Front-Center | 635.1mm |
| Front-Center Horizontal | 631.8mm |
| Wheelbase | 1072mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 420mm |
| Trail | 78.7mm high |
| Mechanical Trail | 74mm |
| Wheel Flop | 25.3mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 117.2mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 112.9mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.2in |
| Tire Outer Diameter | 695.8mm |
| Bike Length with Tires | 1767.8mm |
| Crank Length | 170mm |
| Handlebar Width | 610mm |
| Stem Length | 90mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://primoscycles.com/products/mono-bicycle?variant=49690319814942