Product Colors and Sizes
- Black Friday product
- New Deal product
- Cyber Monday product
- Clearance product
- Deal product
- Best Seller product
- Ecodesign product
- New product
- Staff Pick product
- In The News product
- Innovation product
- product
- Black Friday product
- New Deal product
- Cyber Monday product
- Clearance product
- Deal product
- Best Seller product
- Ecodesign product
- New product
- Staff Pick product
- In The News product
- Innovation product
- product
Rockrider ST540 Mountain Bike 27.5"
Mid-level Sport Trail mountain bike hardtail
Free shipping over $49
Final Sale: No returns or exchanges
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
About this item:
- Yield: Roll efficiently with 27.5” wheels, 18 speeds, and lightweight tires.
- Trajectory control: Manage your trajectory: hydraulic disc brakes, tires and wide handlebars.
- Driving comfort: Enjoy the raised position, adjustable stem, 100mm suspension and hammock saddle.
- Ease of use: Block the fork with a simple gesture and effortlessly adjust your saddle.
- Lifetime warranty: ROCKRIDER guarantees the frame, stem and handlebars for life.
Product Features

Cycling comfort
100 mm hydraulic fork (smoother). Ergonomic saddle. Height-adjustable stem.
Efficiency
Shimano 2×9 speeds. Lightweight, fast tires. Fork with lockout.
Easy to use
2×9 speeds, hydraulic disc brakes, suspension fork
Questions & Answers
There are no questions
Be the first to post a question
Product Customer Reviews
Fantastic bike to ride, very comfortable, goes through the gears with ease, very pleased
Amazing bike for the money.
The spoke tips on the rim side are tearing the rim's alloy. Basically, the spoke looks fine, but it's the rim that's breaking down... It doesn't look very serious...
truly unbeatable quality/price ratio
I lost my pedal twice
I have been using it for a week. The bike is very nice. The gearboxes work precisely and beautifully. The brakes still need to wear in, but they are already quite effective. The telescope does its job nicely. The pedals are plastic, but they seem solid, they don't slide. The seats are also comfortable for me. I haven't had any problems with the tires yet, they grip properly. The rear gear row, on the other hand, is of very poor quality. It wobbles slightly during rotation and this is probably why the chain makes a crunching sound under load. It is worth replacing it with another, better quality one. After such a short period of use, I feel that it is a light, well-controlled bike in this price category.
all the time the left crank falls out I've already bought a clip blocking it 6 times the carvings didn't fall out but still this clip takes while riding and falls out although it's impossible but it happens as I found out it's a bicycle defect during production so this shop sold me damaged goods and also when I replaced Karol's clamp from the rear disc brake they couldn't adjust the cable length and now it's there. the whole brake needs to be replaced for 400zł thanks decathlon for the next expenses for your incompetent repair.
it's great to ride it
I can only recommend it. It has met all the criteria so far.
more than two years of use and I can assure you that it is worth the purchase.
EXCELLENCE
R. A. S.
Hello. From ordering to pickup, everything went flawlessly. Thank you very much. That's why we've now bought our sixth bike from you.
Purchase for my son who is very happy with his mountain bike
nice color good value for money
Size Guide

Additional Product Information
Composition
Frame : 100.0% Aluminum
Design
Entirely designed and developed in France at the B'Twin Village (Lille), this mountain bike is the fruit of the work of an expert team of passionate mountain bikers. Production is done in Suzhou, China by our own factories in order to be as close to the regional Decathlon stores as possible.
Guarantee
Lifetime on frame and fork, 2 years on parts.
Origin
Imported
Ca warning
California Prop65 WARNING: This product can expose you to chemicals including Lead, which is known by the State of California to cause cancer. For more information, go to www.P65warnings.ca.gov.
Law label information

Rockrider ST540 Mountain Bike 27.5"
Your location: City, ST
Please enter a valid city with state or zipcode. Example: San Francisco, CA or 94101
Order online for
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.
