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Rockrider ST100, Mountain Bike, 24'', Kids 4'5" to 4'11"

Sale price: $169.00 Regular price: $299.00

We've designed this robust, easy-to-use (1 chainring) 24-inch children's MTB for helping children to get started with mountain biking.

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Size Guide
Sale price: $169.00 Regular price: $299.00

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8627456

Product Features

A photo of the Rockrider ST100, Mountain Bike, 24'', Kids 4'5" to 4'11" in use

Rockrider ST100, Mountain Bike, 24'', Kids 4'5" to 4'11" | 9- to 12-year-olds (4'5" to 4'11") wanting to start mountain biking.

We've designed this robust, easy-to-use (1 chainring) 24-inch children's MTB for helping children to get started with mountain biking.

Easy to use

Equipped with a grip shifter to easily change gears (6 speeds).

Brake control

2 V-Brake pads for effective braking.


Tires with side lugs for good grip in the turns.

Cycling comfort

A saddle with a sporty design, specially sized for children's build.

Product Lifestyle Image Gallery

Image Gallery

Rockrider ST100, Mountain Bike, 24'', Kids 4'5 

Rockrider ST100, Mountain Bike, 24'', Kids 4'5 

Rockrider ST100, Mountain Bike, 24'', Kids 4'5 

Rockrider ST100, Mountain Bike, 24'', Kids 4'5

Product Customer Reviews

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Rockrider ST100, Mountain Bike, 24'', Kids 4'5
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Много сме доволни. Много добро качество. Детето е щастливо от избора. Оборудването с фар и стоп също е много голям плюс особено, когато денят започва да става по-къс.

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Благодарим Ви, за отделеното време да споделите обратната си връзка за нашия продукт!

Като спортна компания, която се стреми да направи спорта достъпен за всеки, нашата цел е винаги да предоставяме качествени и функционални продукти.

Спортни поздрави,

Екипът на Декатлон

Велосипеда е супер!

Малкия го кара всеки ден и е щастлив.

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За тези нужди е идеален

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Отличен велосипед

Отличен велосипед

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Kolo pro děti - luxusní vyváženost kvality

Jsme maximálně spokojeni.

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Kolo 24''

Kolo Jezdí dobře, jedině co se synovi nelíbí, jsou blatníky, nepraktické a plast naprosto na kolo nevhodny

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Dcera je velmi spokojená.

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zatím je spokojený jezdí krátkou dobu

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Pro kluka kterému musíme stejně pomalu každý rok kupovat nové kolo, protože roste, je to super....

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Dcera je spokojena, jízda se jí líbí na tomto kole :-) To je pro mě fajn :-)

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Zatím bez problémů, syn je spokojený, vše funguje jak má, ale používáme krátce

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Plná spokojenost, za ty peníze dobré kolo

Kolo splnilo očekávání. Syn spokojený, nájezd cca 45km každý víkend

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Dobré kolo za pěknou cenu. Kolo má těžší rám.Syn je spokojený.

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Velmi spokojený

Super výrobek syn je spokojen

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kolo vynikající,

vnučka spokojené.

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Size Guide

Size Guide Visual

Additional Product Information


Bike frame

  • 100% Steel

A frame that is suitable for mountain biking

Our engineers have designed a new sturdy steel frame. The frame's rear chainstays are short, making the bike responsive and easy to handle.

Controlled braking

2 V-Brake pads for effective braking. These brakes are composed of calipers that exert more or less pressure on the rim to slow or stop the rotation of the wheels.

Changing gears (6 speeds)

This bike is equipped with a grip shifter to change between the 6 speeds: It's a safer and easier system for children so they don't need to let go of the handlebar. This makes changing gears to match the terrain simple and easy!

A reinforced, ergonomic saddle

A saddle with a sporty design, designed with care to adapt to the morphology of children. It is equipped with a plastic cover at the back (a bumper) to protect from any potential impacts.

Riding position

To provide you with maximum comfort, this mountain bike is equipped with a high-rise stem. Your position on the bike is slightly raised so you can better anticipate your trajectory.


The new chainset has a 152 mm crank that is designed for a child's leg length. This chainset allows you to start pedaling more easily. The double chain guard prevents the chain from derailing.

24" wheels and mtb tires

To transport the bike, we’ve made it easy to remove and attach the front wheel. It is equipped with a quick-release system. The tires are designed for mountain biking. The side lugs provide good grip for cornering. The recommended tire pressure is indicated on the side of the tire (2 to 3.5 bars). 24" inner tube, 1.7" to 2.2" Schrader valve.

Bike accessories

This MTB is equipped with a bell, lighting, wheel reflectors and platform pedals. The frame is also compatible with other B'Twin accessories: - front and rear mudguards; - stand; - bottle holder; - bike bags; - stabilizers

Dimensions of the bike ready to use

Length: 63". Height: 39.4". Width: 22".



Storage instructions

Store the bike in a clean, dry place. Clean and grease the chain regularly. Our tips for before each ride: inflate the tires to the pressure indicated on the sidewall.


for life (frame, stem, handlebars, rigid fork). Find out more about the bike guarantee.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual