2018 Chromag Bikes Rootdown 27.5+

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Suspension
160mm fork travel
Features
Disc brake
Very 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
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

S
M
M/L
L
XL
Stack
647mm
647mm
647mm
647mm
647mm
Reach
410mm
438mm
452mm
473mm
492mm
Stack to Reach Ratio
1.58:1
1.48:1
1.43:1
1.37:1
1.32:1
Seat Tube Length, C-T
394mm
431mm
470mm
495mm
533mm
Top Tube Length, Effective/Horizontal HT Top
578mm
603mm
622mm
648mm
667mm
Top Tube Slope
27.5deg
22.8deg
18.6deg
15.7deg
11.9deg
Head Tube Angle
65deg
65deg
65deg
65deg
65deg
Seat Tube Angle
75deg
75deg
75deg
75deg
75deg
Head Tube Length
95mm
95mm
95mm
105mm
105mm
Bottom Bracket Drop
51.2mm
51.2mm
51.2mm
51.2mm
51.2mm
Bottom Bracket Height
317mm
317mm
317mm
317mm
317mm
Chainstay Length
415mm
415mm
415mm
415mm
415mm
Chainstay Length Horizontal
411.8mm
411.8mm
411.8mm
411.8mm
411.8mm
Front-Center
738mm
764.9mm
782.9mm
808.8mm
827.8mm
Front-Center Horizontal
736.2mm
763.2mm
781.2mm
807.2mm
826.2mm
Wheelbase
1148mm
1175mm
1193mm
1219mm
1238mm
Fork Offset/Rake
51mm
51mm
51mm
51mm
51mm
Trail
115.4mm
very high
115.4mm
very high
115.4mm
very high
115.4mm
very high
115.4mm
very high
Mechanical Trail
104.6mm
104.6mm
104.6mm
104.6mm
104.6mm
Wheel Flop
44.2mm
44.2mm
44.2mm
44.2mm
44.2mm
Standover Height
687mm
695mm
729mm
749mm
784mm
Tire to Pedal Spindle
199.8mm
170 mm cranks
226.7mm
170 mm cranks
244.7mm
170 mm cranks
270.6mm
170 mm cranks
289.6mm
170 mm cranks
Pedal Spindle to Ground Clearance
147mm
170 mm cranks
147mm
170 mm cranks
147mm
170 mm cranks
147mm
170 mm cranks
147mm
170 mm cranks

27.5+ Build

S
M
M/L
L
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
650B/27.5 in
584 mm BSD
Tire Width
3in
3in
3in
3in
3in
Tire Outer Diameter
736.4mm
736.4mm
736.4mm
736.4mm
736.4mm
Bike Length with Tires
1884.4mm
1911.4mm
1929.4mm
1955.4mm
1974.4mm
Handlebar Width
780mm
780mm
780mm
780mm
780mm
Stem Length
40mm
40mm
40mm
40mm
40mm

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:http://www.chromagbikes.com/bikes/rootdown#geometry