2021 Format 1311 Plus Base M
Build
650B/27.5 in × 2.6 in
Insights
Somewhat upright stack and reach vs trend of hardtail trail mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 643mm |
| Reach | 420mm |
| Stack to Reach Ratio | 1.53:1 |
| Seat Tube Length, C-T | 430mm |
| Top Tube Length, Effective/Horizontal Center | 604mm |
| Top Tube Slope | 23.1deg |
| Head Tube Angle | 66deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 308mm |
| Chainstay Length | 428mm |
| Chainstay Length Horizontal | 425.1mm |
| Front-Center | 741.6mm |
| Front-Center Horizontal | 739.9mm |
| Wheelbase | 1165mm |
| Fork Offset/Rake | 51mm |
| Fork Length (On-Axis) | 552mm |
| Trail | 103.6mm very high |
| Mechanical Trail | 94.6mm |
| Wheel Flop | 38.5mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 213.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 138mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 716.1mm |
| Bike Length with Tires | 1881.1mm |
| Handlebar Width | 760mm |
| Stem Length | 45mm |
| Stem Angle | 7deg |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 150mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Rim |
Source:https://format.bike/catalog/mtb/format-1311-plus-2021/