2025 Forbidden Bike Co. Heathen Base S4 (29 Wheels)
Build
700C/29 in × 2.4 in
Insights
Somewhat upright stack and reach vs trend of full-suspension all-mountain/enduro mtb bikes
Design deviates from other sizes of Forbidden Bike Co. Heathen
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 648mm |
| Reach | 495mm |
| Stack to Reach Ratio | 1.31:1 |
| Seat Tube Length, C-T | 470mm |
| Top Tube Length, Effective/Horizontal Center | 657mm |
| Top Tube Slope | 17.5deg |
| Head Tube Angle | 64deg |
| Seat Tube Angle | 76deg |
| Effective Seat Tube Angle, ETT HT Top | 76deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 0mm |
| Bottom Bracket Height | 372mm |
| Chainstay Length | 441mm |
| Chainstay Length Horizontal | 441mm |
| Front-Center | 829.6mm |
| Front-Center Horizontal | 829.6mm |
| Wheelbase | 1270.6mm |
| Fork Offset/Rake | 44mm |
| Fork Length (On-Axis) | 541mm |
| Trail | 132.5mm very high |
| Mechanical Trail | 119.1mm |
| Wheel Flop | 52.2mm |
| Standover Height | 764mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 287.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 202mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 2014.5mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | Unknown |
| Rear Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:https://forbiddenbike.com/bikes/heathen/