2021 Planet X Rocky Road Base

Category
Rigid MTB
Design
Flat Bar, Rigid, suspension corrected
Frame
Titanium
Fork
Carbon/Composite
Features
Disc brake
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

Small
Medium
Large
X-Large
Stack
616mm
624mm
633mm
640mm
Reach
403mm
426mm
448mm
471mm
Stack to Reach Ratio
1.53:1
1.46:1
1.41:1
1.36:1
Seat Tube Length, C-T
394mm
432mm
470mm
508mm
Top Tube Length, Effective/Horizontal HT Top
580mm
605mm
630mm
655mm
Top Tube Slope
24.9deg
21deg
17.4deg
13.9deg
Head Tube Angle
70deg
70deg
70deg
70deg
Seat Tube Angle
74deg
74deg
74deg
74deg
Head Tube Length
92mm
100mm
110mm
120mm
Bottom Bracket Drop
70mm
70mm
70mm
70mm
Bottom Bracket Height
294.3mm
299.4mm
299.4mm
299.4mm
Chainstay Length
450mm
450mm
450mm
450mm
Chainstay Length Horizontal
444.5mm
444.5mm
444.5mm
444.5mm
Front-Center
647mm
673mm
698mm
724mm
Front-Center Horizontal
643.5mm
689.5mm
695.5mm
720.5mm
Wheelbase
1088mm
1134mm
1140mm
1165mm
Fork Offset/Rake
39.2mm
58.1mm
40mm
39.5mm
Trail
90.9mm
very high
72.6mm
high
91.9mm
very high
92.4mm
very high
Mechanical Trail
85.4mm
68.2mm
86.4mm
86.9mm
Wheel Flop
29.2mm
23.3mm
29.5mm
29.7mm
Tire to Pedal Spindle
112.7mm
170 mm cranks
133.6mm
170 mm cranks
158.6mm
170 mm cranks
184.6mm
170 mm cranks
Pedal Spindle to Ground Clearance
124.3mm
170 mm cranks
129.4mm
170 mm cranks
129.4mm
170 mm cranks
129.4mm
170 mm cranks

Base Build

Small
Medium
Large
X-Large
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
2.1in
2.3in
2.3in
2.3in
Tire Outer Diameter
728.7mm
738.8mm
738.8mm
738.8mm
Bike Length with Tires
1816.7mm
1872.8mm
1878.8mm
1903.8mm

Published Sizing Recommendations

Height
160 cm
to
170 cm
168 cm
to
178 cm
175 cm
to
188 cm
185 cm
to
193 cm

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
Category Trend
Rigid MTB
Source:https://www.planetx.co.uk/i/q/CBOORRSX/on-one-rocky-road-sram-sx-titanium-adventure-bike