2017 Chumba Cycles Rastro 27plus/27.5" Base SM
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
View all sizes
Geometry
| Stack | 626mm |
| Reach | 392mm |
| Stack to Reach Ratio | 1.6:1 |
| Seat Tube Length, C-T | 381mm |
| Top Tube Length, Effective/Horizontal Center | 585mm |
| Top Tube Slope | 27.5deg |
| Head Tube Angle | 67deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 33mm |
| Bottom Bracket Height | 335.2mm |
| Chainstay Length | 430mm |
| Chainstay Length Max | 430mm |
| Chainstay Length Horizontal | 428.7mm |
| Chainstay Length Horizontal Max | 428.7mm |
| Front-Center | 691.1mm |
| Front-Center Horizontal | 690.3mm |
| Wheelbase | 1119mm |
| Wheelbase Max | 1119mm |
| Fork Offset/Rake | 42.9mm |
| Trail | 109.7mm very high |
| Mechanical Trail | 101mm |
| Wheel Flop | 39.5mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 152.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 165.2mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 3in |
| Tire Outer Diameter | 736.4mm |
| Bike Length with Tires | 1855.4mm |
| 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:Bike Counterculture Geometry Database