Technical information
How to choose your VTC size?

3 sizes available:

• Size S: 1.50 m to 1.65 m

• Size M: 1.66 m to 1.77 m

• Size L: 1.78 m to 1.89 m

If you are between two sizes:

• Choose the smaller size for better maneuverability and comfort (more upright position)

• Choose the larger size for a more stretched-out position (better for speed).

Easy mounting

The low frame allows you to easily step over the bike from the front without having to lift your leg over the saddle. This frame type is used by both men and women seeking more comfort. It is especially convenient when riding with a child. The child carrier requires stepping over the bike from the front.

Steel frame and fork. Lifetime warranty.

The frame and fork are made of steel and come with a lifetime warranty.

The curve on the top tube makes it more comfortable during stops, especially on urban trips.

8-speed transmission

The single chainring transmission makes shifting easier: You change gears with just one trigger. The gear ratio is designed to handle small hills.

• 8-speed MICROSHIFT H081 cassette

• Cogs: 11 / 34

• Steel single chainring: 36 teeth

• KMC Z51 chain with quick link

• BTWIN RD M25 rear derailleur

• Anti-derailleur guard

V-brake pad brakes

Brake efficiently with the 2 V-brake pad brakes.

Comfortable and dynamic trekking position

Adjust the stem height to your liking for increased comfort when riding your VTC.

• Semi-curved handlebar (620 mm)

• Adjustable height stem

• Stem length: 110 mm

• 1 1/8-inch headset

• Handlebar and stem welded into one piece for more safety and comfort

• Rigid steel fork (threaded 1 1/8-inch pivot)

Trekking saddle

Since having a comfortable seat is essential, our team chose the ERGOFIT TREKKING 500 saddle. It provides a position suitable for VTC with a 60° back angle.

• Collar diameter = 32 mm

• Seat post diameter = 28.6 mm

Double-walled wheels

Ride confidently with double-walled wheels offering great durability and longevity.
Dimension: 700x19C

Versatile road & trail tires

The Riverside 120 is equipped with versatile BTWIN TREKKING tires to take you anywhere, on both roads and trails.
Recommended tire pressure: 2 to 4 bars (details on the tire sidewalls).

Dimensions: 700 x 38 (38-622)
Minimum width dimension: 28 mm

Flat pedals

The Riverside 120 comes with versatile pedals featuring a wide contact surface for better foot support.

Included accessories

Your Riverside 120 comes with a bell, lights (front/back), wheel reflectors, and pedals.

Accessory compatibility

The Riverside 120 LF is compatible with:

• Most racks (recommended references: 8364376 and 8402094)

• Central kickstands (recommended references: 8172769 and 8367621)

• Mudguards (recommended reference: 8328053)

Sizes M and L are compatible with frame-mounted baby carriers. Size S is not compatible.
(Example reference: 8487125)

(Enter the product code in the Decathlon website search bar to find your accessory)

Equip your bike with everything you need.

Weight

14.9 kg in size M

Warranty

Lifetime warranty: frame, stem, and handlebars. Spare parts: 2 years.

Weight

15.2 kg

Technical information

Weight
S: 15.1 kg
M: 15.2 kg
L: 15.3 kg
XL: 15.5 kg

Lightweight, Comfortable, and Playful Frame
Our designers have created a new, easy-to-mount frame. This CGF (Comfort Geometry Frame) made entirely of aluminum is both comfortable and easy to handle. The geometry has been designed to keep your back upright while shortening the rear stays to ensure good agility when cornering.

Derailleur and Transmission: A Single Chainring Like the Pros!
Discover the efficiency and ease of a single chainring:
1 chainring and 9 speeds.
Accelerate on flat terrain and easily tackle uphill climbs without compromise.
With just one shifter on the handlebars, no more thinking!

ROCKRIDER FC ATB 100 single chainring – 32 teeth with 2 chain guides (anti-derailment)

MICROSHIFT RD-M46-L Rear Derailleur

MICROSHIFT SL-759 Right Shifter with speed indicator

MICROSHIFT H092 Cassette (9 cogs, 11 to 36 teeth)

Strong KMC Z9 Chain

Front Suspension
The 80mm front suspension allows you to comfortably tackle your first obstacles on slightly rugged trails.
Easily adjust the hardness with U-FIT (Weight Adjuster) technology. Simply turn the dial on the fork to match your weight (from 55kg to 105kg).

27.5″ Wheels and Tires for Dry Terrain
The ST 120 wheels are forgiving and robust, with 19mm rims and 28 spokes on 27.5-inch double-wall rims.
Conquer your first obstacles with ease: small stones, roots, holes, and bumps!
The DRY 27.5 x 2.0 tires are ideal for dry terrain, with optimized rolling efficiency thanks to a central tread and lateral studs for good grip in turns.

Mechanical Disc Brakes
The 160mm TEKTRO TKD 68 mechanical disc brakes offer powerful and progressive braking at the front and rear.
The TEKTRO brake levers are made of aluminum, easy to grip, and precise. Only two fingers are needed for braking.
For optimal braking, perform 3 or 4 series of 10 dry and intermittent brake applications to break in your brake pads.
Consider having your disc brakes serviced once a year.

Handlebar, Stem, Grips
With its 10° upward-angled stem, the ST 120 mountain bike’s handlebar setup is raised, accessible, and comfortable.

90mm aluminum stem with 10° angle for maximum comfort

640mm aluminum handlebar for stability and control

Soft-touch grips for excellent grip and a comfortable feel.

Saddle
The welded saddle mount on the ST 120 prevents saddle movement.
We offer an exclusive ERGOFIT saddle, which is wider with a hammock shape for better comfort.
Easily adjust the saddle height with the 350mm or 400mm (depending on size) steel FLEX seat post. The 27.2mm diameter provides flexibility, offering 30% more than standard posts.

Flat Pedals
The ROCKRIDER ST 120 mountain bike comes with hard resin flat pedals for lightness and safety.
If your foot slips off the pedal, the risk of injury is reduced.

Transport and Storage
To easily remove and install the front wheel, we’ve added a quick-release system.
Our advice: A bike rack is a simple way to transport your mountain bike without dirtying your car.

Which Mountain Bike Size to Choose?
Several sizes available:

• S: 1.50m to 1.64m

• M: 1.65m to 1.74m

• L: 1.75m to 1.84m

• XL: 1.85m to 2.00m
  To adjust the bike to your size and morphology, follow these tips:

While sitting on the saddle, your feet should just touch the ground.

When adjusting the saddle, your knee should be slightly bent with your foot at the lowest pedal position.

If you’re between two sizes, choose the larger size.

Accessories
Your ST 120 mountain bike comes with a bell, front and rear lights, wheel reflectors (catadiopters), and pedals.
The frame is compatible with:

Central stands 300 (ref. 8172767) and 500 (ref. 8172769)

Bottle holders 100 (ref. 8049106) and 500 (ref. 8358133)

MTB mudguard kit (ref. 8385291)

Saddle bags 100 (ref. 8347394) and 500 (ref. 8354448)

Rear rack 500 (ref. 8364376)

Baby seat 100 (ref. 8486913 and 8487125) for sizes M and above.

Warranty
Lifetime warranty (frame, stem, and handlebars). Spare parts availability: 2 years.

Weight
15.2 kg