2020 Rockrider ST540 Base
- Category
- Hardtail Trail MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Fork
- Aluminum
- Suspension
- 100mm fork travel
- Features
- Disc brake
Average 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 | Average 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
Small | Medium | Large | X Large | |
Stack | 588mm | 607mm | 617mm | 635mm |
Reach | 375mm | 399mm | 426mm | 441mm |
Stack to Reach Ratio | 1.57:1 | 1.52:1 | 1.45:1 | 1.44:1 |
Seat Tube Length, Unknown | 421mm | 432mm | 443mm | 493mm |
Top Tube Length, Effective/Horizontal Unknown | 555mm | 585mm | 615mm | 635mm |
Top Tube Slope | 20.4deg | 20.3deg | 19.2deg | 15.6deg |
Head Tube Angle | 69.5deg | 69.5deg | 69.5deg | 69.5deg |
Seat Tube Angle | 73deg | 73deg | 73deg | 73deg |
Head Tube Length | 110mm | 130mm | 140mm | 160mm |
Bottom Bracket Drop | 43mm | 43mm | 43mm | 43mm |
Bottom Bracket Height | 302.3mm | 302.3mm | 302.3mm | 302.3mm |
Chainstay Length Horizontal | 430mm | 430mm | 430mm | 430mm |
Front-Center | 625.5mm | 656.4mm | 687.4mm | 708.3mm |
Front-Center Horizontal | 624mm | 655mm | 686mm | 707mm |
Wheelbase | 1054mm | 1085mm | 1116mm | 1137mm |
Fork Offset/Rake | 42mm | 42mm | 42mm | 42mm |
Fork Length, Unknown | 496mm | 496mm | 496mm | 496mm |
Trail | 84.3mm very high | 84.3mm very high | 84.3mm very high | 84.3mm very high |
Mechanical Trail | 78.9mm | 78.9mm | 78.9mm | 78.9mm |
Wheel Flop | 27.7mm | 27.7mm | 27.7mm | 27.7mm |
Tire to Pedal Spindle | 110.1mm 170 mm cranks | 141.1mm 170 mm cranks | 172mm 170 mm cranks | 193mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 132.3mm 170 mm cranks | 132.3mm 170 mm cranks | 132.3mm 170 mm cranks | 132.3mm 170 mm cranks |
Base Build
Small | Medium | Large | X Large | |
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 | 2.1in | 2.1in | 2.1in | 2.1in |
Tire Outer Diameter | 690.7mm | 690.7mm | 690.7mm | 690.7mm |
Bike Length with Tires | 1744.7mm | 1775.7mm | 1806.7mm | 1827.7mm |
Handlebar Width | 640mm | 640mm | 680mm | 680mm |
Stem Length | 70mm | 70mm | 80mm | 90mm |
Published Sizing Recommendations
Height | 150 cm to 164 cm | 165 cm to 174 cm | 175 cm to 184 cm | 185 cm to 200 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
Hardtail Trail MTBSource:https://www.decathlon.it/p/mtb-st-540-27-5/_/R-p-301097?mc=8500757&c=NERO