2026 RFRP Fat Man Prototype Custom
Build
686mm BSD × 2.4 in
Stack and Reach vs. Category Trend
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Geometry
| Stack | 623mm |
| Reach | 420mm |
| Stack to Reach Ratio | 1.48:1 |
| Seat Tube Length, Unknown | 460mm |
| Top Tube Length, Actual C-C | 568mm |
| Head Tube Angle | 68deg |
| Effective Seat Tube Angle, ETT HT Top | 73.5deg |
| Head Tube Length | 90mm |
| Bottom Bracket Drop | 100mm |
| Bottom Bracket Height | 304mm |
| Chainstay Length | 465mm |
| Chainstay Length Horizontal | 454.1mm |
| Front-Center | 688.2mm |
| Front-Center Horizontal | 680.9mm |
| Wheelbase | 1135mm |
| Fork Offset/Rake | 44mm |
| Fork Length (Axle-To-Crown) | 490mm |
| Trail | 115.8mm very high |
| Mechanical Trail | 107.3mm |
| Wheel Flop | 40.2mm |
| Tire to Pedal Spindle Distance With 160 mm cranks | 124.2mm |
| Pedal Spindle to Ground Clearance With 160 mm cranks | 144mm |
Prototype Build
| Wheel Size | 686mm BSD |
| Tire Width | 2.4in |
| Tire Outer Diameter | 807.9mm |
| Bike Length with Tires | 1942.9mm |
| Crank Length | 160mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:n/a