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Btwin Rockrider ST100 Mountain Bike 20" Kids 3'11" to 4'5"
A sturdy, single-speed, 20" white bike that's simple to ride. Equipped with front and rear lights and a bell, it can be ridden around town as well as on trails.
See shipping rate at checkout
Final Sale: No returns or exchanges
Free returns
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Features
Easy to learn
Single-speed, simple and efficient bike. Bike weight 24.3 lbs.
Bike safety
V-Brakes provide powerful and easy braking.
Lifetime warranty
B’Twin offers a lifetime warranty on the frame, stem, handlebar and rigid fork.
Questions & Answers
Look for product information, frequently asked questions, opinions...
Question:
Is the rear hub freewheeling or coaster brake?
Answer:
This bike uses a freewheel on the rear hub only
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Product Customer Reviews
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We've had the bike for almost 3 years now and it still looks new! However, my son uses it regularly, sometimes riding in the rain and in puddles. There is not a single rust spot on the entire bike. I highly recommend it .
My son loves the bike and enjoys riding it. nothing to point
Good quality children's mountain bike that is used every day
I was satisfied. Well done again 👏
Pleased with the purchase surprise for my grandson really happy
Good luck
Let quality always be your concern
RAS
The bike is very practical for a beginner.
Ras
Within 3 months had spent more time in the shop than being ridden problems with gear,brake,chain etc. Customer service mainly poor to non existent first time purchasing a bike from Decathlon seriously considering contacting consumer trading.
good bike
Very helpful staff looking forward to other visit when the time comes!!!
The bike is really top my son is delighted and uses it often I recommend for decathlon quality as usual
Price quality
Additional Product Information
Composition
Bike frame : 100.0% Steel
Frame
The chainwheel anti-derailment device and low step-through frame make it easy to get on and off.
Accessories / equipment
Fully equipped for use on public roads (bell, reflectors).The rear derailleur guard protects the derailleur from damage in the event of an impact.
Origin
Imported
Law label information
Btwin Rockrider ST100 Mountain Bike 20" Kids 3'11" to 4'5"
Your location: City, ST
Please enter a valid city with state or zipcode. Example: San Francisco, CA or 94101
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
| Weight Thresholds | Shipping within California | Shipping outside of California |
|---|---|---|
| > 9 lbs | $20.00 | $25.00 |
| > 30 lbs | $50.00 | $65.00 |
| > 100 lbs | $100.00 | $125.00 |
| > 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.
