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Rockrider ST540 Mountain Bike 27.5"

Sale price: $449.00 Regular price: $699.00

Mid-level Sport Trail mountain bike hardtail

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Size: Select a size
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Sale price: $449.00 Regular price: $699.00

Free shipping over $49

Final Sale: No returns or exchanges

See our return rules for heavy items

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.
Model: 8629914

Product Features

A photo of the Rockrider ST540 Mountain Bike 27.5" in use
A photo of the Rockrider ST540 Mountain Bike 27.5" in use

Rockrider ST540 Mountain Bike 27.5" | Sport Trail mountain biking

Mid-level Sport Trail mountain bike hardtail

Cycling comfort

100 mm hydraulic fork (smoother). Ergonomic saddle. Height-adjustable stem.


Shimano 2×9 speeds. Lightweight, fast tires. Fork with lockout.

Easy to use

2×9 speeds, hydraulic disc brakes, suspension fork

Questions & Answers

Product Customer Reviews

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2959 Reviews
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Rockrider ST540 Mountain Bike 27.5
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constant failure of the crank

His left crank keeps falling out. I've bought a clip that locks it 6 times. The carvings don't fall out, but the clip keeps falling out while riding. Even though it's impossible, it still happens. I found out that it was a manufacturing defect of the bike, so the store sold it to me with a damaged one. goods, and when I replaced Karol's rear disc brake clamp, they couldn't adjust the length of the cable and now it's there. the entire brake needs to be replaced for PLN 400, thanks to decathlon for further expenses for your incompetent repair.

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It's ok

It's great to ride

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Very good bike

I can only recommend it. It has fulfilled all criteria so far

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very good

More than two years of use and I can assure you that it is worth the purchase.

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Rockrider MTB ST 540


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Purchase for my son…

Purchase for my son who is very happy with his mountain bike

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very good bike

nice color good value for money

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I've never had a better yearrider

A decent bike, elegant. It lasted almost four years without servicing.

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Everything's fine

great bike, rides perfectly, I recommend it 😊

Price quality is fine...

...But it doesn't give the impression of a "good" bike when riding it. Change is the most regular thing. If you try to shift with a little force (because this is a climb and you can't stop pushing so hard) the shift engages. A similar thing happens in dishes. The brakes are reasonable and replacement parts are not very expensive.

Rockrider mountain bike

The bike was perfectly adjusted from the shop. The bike has a very comfortable gel seat, on which you can sit for many kilometers without pain. I really appreciate the ability to adjust the stiffness of the front fork and the efficiency of the hydraulic disc brakes.

The best purchase! Mr…

The best purchase! Mr loves his bike for his Saturday outings with the guys!

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Perfect all around

Good morning. From ordering to pickup, everything went perfectly. Thank you for that. That is the reason why we have now bought the 6th bike from you.

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Buy it now it's great
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Size Guide

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Additional Product Information


Frame : 100.0% Aluminum


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.


Lifetime on frame and fork, 2 years on parts.



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

Law label information

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