2019 Mystic Alluvium 27.5+ Large
Build
650B/27.5 in × 3 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
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Geometry
| Stack | 656mm |
| Reach | 482mm |
| Stack to Reach Ratio | 1.36:1 |
| Seat Tube Length, C-T | 460mm |
| Top Tube Length, Effective/Horizontal Center | 671mm |
| Top Tube Slope | 19.4deg |
| Head Tube Angle | 66deg |
| Seat Tube Angle | 73.9deg |
| Head Tube Length | 131mm |
| Bottom Bracket Drop | 62.5mm |
| Bottom Bracket Height | 305.7mm |
| Chainstay Length | 429mm |
| Chainstay Length Horizontal | 424.4mm |
| Front-Center | 804mm |
| Front-Center Horizontal | 801.6mm |
| Wheelbase | 1226mm |
| Fork Offset/Rake | 51mm |
| Fork Length (Axle-To-Crown) | 561mm |
| Trail | 108.1mm very high |
| Mechanical Trail | 98.8mm |
| Wheel Flop | 40.2mm |
| Standover Height | 858mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 265.8mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 135.7mm |
27.5+ Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 3in |
| Tire Outer Diameter | 736.4mm |
| Bike Length with Tires | 1962.4mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 150mm |
| Suspension Sag | Unknown |
| Frame Material | Steel |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://theradavist.com/2019/09/open-sourced-the-mystic-alluvium-27-5-29er-hardtail-mtb-geo/