2026 Marin Bikes Madrone Trail Base Medium
Build
650B/27.5 in × 2.25 in
Stack and Reach vs. Category Trend
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Geometry
| Stack | 500mm |
| Reach | 345mm |
| Stack to Reach Ratio | 1.45:1 |
| Seat Tube Length, C-T | 515mm |
| Top Tube Length, Effective/Horizontal Center | 524mm |
| Top Tube Slope | 1.8deg |
| Head Tube Angle | 66deg |
| Seat Tube Angle | 70deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 52mm |
| Bottom Bracket Height | 297.2mm |
| Chainstay Length | 470mm |
| Chainstay Length Horizontal | 467.1mm |
| Front-Center | 598.2mm |
| Front-Center Horizontal | 595.9mm |
| Wheelbase | 1063mm |
| Fork Offset/Rake | 50mm |
| Trail | 100.7mm very high |
| Mechanical Trail | 92mm |
| Wheel Flop | 37.4mm |
| Standover Height | 795mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 79mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 127.2mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 698.3mm |
| Bike Length with Tires | 1761.3mm |
| Crank Length | 170mm |
| Handlebar Width | 750mm |
| Stem Length | 90mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Moto/Klunker/Riser Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 163 cm to 175 cm |
Source:marinbikes.com