2021 Decathlon RockRider ST 120 L

Build

650B/27.5 in × 2 in

Insights

Average stack and reach vs trend of hardtail cross-country mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
615mm
Reach
429mm
Stack to Reach Ratio
1.43:1
Seat Tube Length, Unknown
417mm
Top Tube Length, Effective/Horizontal Unknown
616.6mm
Top Tube Slope
21.4deg
Head Tube Angle
69.5deg
Seat Tube Angle
73deg
Head Tube Length
140mm
Bottom Bracket Drop
43mm
Bottom Bracket Height
299.8mm
Chainstay Length
430mm
Chainstay Length Horizontal
427.8mm
Front-Center
688.5mm
Front-Center Horizontal
687.2mm
Wheelbase
1115mm
Fork Offset/Rake
40mm
Fork Length, Unknown
474mm
Trail
85.5mm
very high
Mechanical Trail
80.1mm
Wheel Flop
28mm
Tire to Pedal Spindle Distance
With 170 mm cranks
175.7mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
129.8mm

ST 120 Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
2in
Tire Outer Diameter
685.6mm
Bike Length with Tires
1800.6mm
Handlebar Width
640mm
Stem Length
90mm
Stem Angle
10deg
Suspension Type
Hardtail (Front suspension)
Bar Type
Flat Bar
Fork Travel
80mm
Suspension Sag
Unknown
Frame Material
Aluminum
Fork Material
Unknown
Brake Type
Disc

Published Sizing Recommendations

Height
175 cm
to
184 cm
Source:https://www.decathlon.it/p/mtb-rockrider-st-120-nero-azzurro-27-5/_/R-p-305496