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Rockrider ST540 Mountain Bike 27.5"

Sale price: $350.00 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: $350.00 Regular price: $699.00

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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.

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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2949 Reviews
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Rockrider ST540 Mountain Bike 27.5
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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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Buy it now it's great

Good value for money

Good value for money

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Bike does not conform to the description

The bicycle is not the one in the description, the front double chainring is not Shimano, the front fork has a front bridge and no rear, the brake calipers are black and not white, I don't know if they are of inferior quality, the front derailleur is not Shimano but different from the photos the knob shifter is not Shimano acera wheel previous history I don't know if there are any extremes for a reported non-compliant product it is not a form of fraud

Excellent purchase

An excellent compromise between price and quality

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Fine for recreational riding.

The bike is ok. The brakes are strangely inefficient, I don't know if it's the pads or something else, but my Srama Vs seem more efficient.

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ST540 very fun

Very fun and smooth ride

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Beyond expectations

The bike is truly wonderful, it arrived very quickly, and the staff in the Rozzano bike department proved to be courteous, attentive and professional. The bike was delivered to me perfectly assembled and fully adjusted properly. I thank all the guys at Decathlon Rozzano for their availability.

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in the top

in the top

Rockrider ST 540

The bike is very good, it is very light and it is perfect for MTB - DOWNHILL

Bicycle Worth Attention

Good bike, nice equipment configuration at an affordable price 👍

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Size Guide

Size Guide Visual

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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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


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