2017 Chumba Cycles Rastro 27plus/27.5" Base
- Category
- Hardtail Trail MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 150mm fork travel
- Features
- Disc brake
Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
SM | MD | LG | XL | |
Stack | 626mm | 636mm | 636mm | 643mm |
Reach | 392mm | 408mm | 428mm | 451mm |
Stack to Reach Ratio | 1.6:1 | 1.56:1 | 1.49:1 | 1.43:1 |
Seat Tube Length, C-T | 381mm | 431.8mm | 482.6mm | 533.4mm |
Top Tube Length, Effective/Horizontal Center | 585mm | 605mm | 625mm | 650mm |
Top Tube Slope | 27.5deg | 22.7deg | 17.1deg | 12.4deg |
Head Tube Angle | 67deg | 67deg | 67deg | 67deg |
Seat Tube Angle | 73deg | 73deg | 73deg | 73deg |
Head Tube Length | 110mm | 120mm | 120mm | 130mm |
Bottom Bracket Drop | 33mm | 33mm | 33mm | 33mm |
Bottom Bracket Height | 335.2mm | 335.2mm | 335.2mm | 335.2mm |
Chainstay Length | 430mm | 430mm | 430mm | 430mm |
Chainstay Length Max | 430mm | 430mm | 430mm | 430mm |
Chainstay Length Horizontal | 428.7mm | 428.7mm | 428.7mm | 428.7mm |
Chainstay Length Horizontal Max | 428.7mm | 428.7mm | 428.7mm | 428.7mm |
Front-Center | 691.1mm | 711mm | 731mm | 758mm |
Front-Center Horizontal | 690.3mm | 710.3mm | 730.3mm | 757.3mm |
Wheelbase | 1119mm | 1139mm | 1159mm | 1186mm |
Wheelbase Max | 1119mm | 1139mm | 1159mm | 1186mm |
Fork Offset/Rake | 42.9mm | 42.6mm | 42.6mm | 43.6mm |
Trail | 109.7mm very high | 110mm very high | 110mm very high | 109mm very high |
Mechanical Trail | 101mm | 101.2mm | 101.2mm | 100.3mm |
Wheel Flop | 39.5mm | 39.6mm | 39.6mm | 39.2mm |
Tire to Pedal Spindle | 152.9mm 170 mm cranks | 172.8mm 170 mm cranks | 192.8mm 170 mm cranks | 219.8mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 165.2mm 170 mm cranks | 165.2mm 170 mm cranks | 165.2mm 170 mm cranks | 165.2mm 170 mm cranks |
Base Build
SM | MD | LG | XL | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 3in | 3in | 3in | 3in |
Tire Width Max | 3in | 3in | 3in | 3in |
Tire Outer Diameter | 736.4mm | 736.4mm | 736.4mm | 736.4mm |
Bike Length with Tires | 1855.4mm | 1875.4mm | 1895.4mm | 1922.4mm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Hardtail Trail MTBSource:Bike Counterculture Geometry Database