2021 Planet X Rocky Road Base
- Category
- Rigid MTB
- Design
- Flat Bar, Rigid, suspension corrected
- Frame
- Titanium
- Fork
- Carbon/Composite
- Features
- Disc brake
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 ScaleCategory Trend
Rigid MTBSource:https://www.planetx.co.uk/i/q/CBOORRSX/on-one-rocky-road-sram-sx-titanium-adventure-bike