2017 Chumba Cycles URSA 29plus Backcountry Base

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Features
Disc brake
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Somewhat aggressive stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Somewhat aggressive stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Somewhat aggressive stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

SM
MD
LG
XL
Stack
595mm
604mm
615mm
616mm
Reach
404mm
426mm
448mm
454mm
Stack to Reach Ratio
1.47:1
1.42:1
1.37:1
1.36:1
Seat Tube Length, C-T
381mm
431.8mm
482.6mm
520.7mm
Top Tube Length, Effective/Horizontal Center
585mm
610mm
635mm
645mm
Top Tube Slope
24.1deg
19.1deg
14.6deg
11.1deg
Head Tube Angle
69deg
69deg
69deg
69deg
Seat Tube Angle
72.5deg
72.5deg
72.5deg
72.5deg
Head Tube Length
90mm
100mm
110mm
115mm
Bottom Bracket Drop
56mm
56mm
56mm
56mm
Bottom Bracket Height
331.2mm
331.2mm
331.2mm
331.2mm
Chainstay Length
460mm
460mm
460mm
460mm
Chainstay Length Max
460mm
460mm
460mm
460mm
Chainstay Length Horizontal
456.6mm
456.6mm
456.6mm
456.6mm
Chainstay Length Horizontal Max
456.6mm
456.6mm
456.6mm
456.6mm
Front-Center
652.8mm
678.7mm
703.7mm
717.6mm
Front-Center Horizontal
650.4mm
676.4mm
701.4mm
715.4mm
Wheelbase
1107mm
1133mm
1158mm
1172mm
Wheelbase Max
1107mm
1133mm
1158mm
1172mm
Fork Offset/Rake
36.9mm
37.4mm
36.3mm
43.4mm
Fork Length (Axle-To-Crown)
490mm
490mm
490mm
490mm
Trail
109.1mm
very high
108.6mm
very high
109.8mm
very high
102.2mm
very high
Mechanical Trail
101.9mm
101.4mm
102.5mm
95.4mm
Wheel Flop
36.5mm
36.3mm
36.7mm
34.2mm
Standover Height
736.6mm
774.7mm
805.2mm
825.5mm
Tire to Pedal Spindle
95.6mm
170 mm cranks
121.5mm
170 mm cranks
146.5mm
170 mm cranks
160.4mm
170 mm cranks
Pedal Spindle to Ground Clearance
161.2mm
170 mm cranks
161.2mm
170 mm cranks
161.2mm
170 mm cranks
161.2mm
170 mm cranks

Base Build

SM
MD
LG
XL
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
3in
3in
3in
3in
Tire Width Max
3in
3in
3in
3in
Tire Outer Diameter
774.4mm
774.4mm
774.4mm
774.4mm
Bike Length with Tires
1881.4mm
1907.4mm
1932.4mm
1946.4mm

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 Scale
Source:Bike Counterculture Geometry Database