2021 Marin Bikes bolinas ridge Base M (27.5)
Build
650B/27.5 in × 2.2 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail cross-country mtb bikes
Design deviates from other sizes of Marin Bikes bolinas ridge
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 590mm |
| Reach | 430mm |
| Stack to Reach Ratio | 1.37:1 |
| Seat Tube Length, C-T | 431mm |
| Top Tube Length, Effective/Horizontal Center | 599.2mm |
| Top Tube Slope | 17.8deg |
| Head Tube Angle | 68.5deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 48mm |
| Bottom Bracket Height | 299.9mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 427.3mm |
| Front-Center | 692.6mm |
| Front-Center Horizontal | 690.9mm |
| Wheelbase | 1118.2mm |
| Fork Offset/Rake | 44mm |
| Fork Length, Unknown | 560mm |
| Trail | 89.7mm very high |
| Mechanical Trail | 83.5mm |
| Wheel Flop | 30.6mm |
| Standover Height | 706.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 174.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 129.9mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.2in |
| Tire Outer Diameter | 695.8mm |
| Bike Length with Tires | 1814mm |
| Crank Length | 170mm |
| Handlebar Width | 780mm |
| Stem Length | 45mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 80mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
Source:https://www.marinbikes.com/bikes/2024-bolinas-ridge-2