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Rockrider ST530 Mountain Bike 27.5"

Sale price: $300.00 Regular price: $599.00

Raised position, stem can be raised up to 3 cm, ergonomic saddle: comfort that also yields greater efficiency. 27.5" wheels, double disc brakes, 9 speeds.

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Size Guide
Sale price: $300.00 Regular price: $599.00

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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:

  • Light weight 6000 series comfort desgined alumium
  • BTwin U-Fit 80 Fork with adjustable dampner, Front Suspension Fork
  • Microshift Advent 9spd Drivetrain
  • Aero Trail Evo Aluminium double walled Disc brake MTB wheelset
  • Rockrider by Tektro Dual Piston Hydraulic Disc Brakes
  • Ergofit Evo Saddle
  • Lifetime Warranty on the frame
Model: 8629973

Product Features

A photo of the Rockrider ST530 Mountain Bike 27.5" in use
A photo of the Rockrider ST530 Mountain Bike 27.5" in use

Questions & Answers

Look for product information, frequently asked questions, opinions...


If i buy this mountain bike. It comes assembled ? IIn How many time I can get it in the warehouse, in Oakland? I'll be in Bay área till nov 1st.


The bike comes 90% assembled - assembly should only take aout 15 minuites with the tools provided. Yes you can pick up at the warehouse Nov 1st.

By Thierry on Nov 1, 2023 | STAFF

Product Customer Reviews

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Rockrider ST530 Mountain Bike 27.5
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A good bike, to take a ride from time to time.

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Very good mountain bike

Very good mountain bike

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Rockroder st 530 bike with hydraulics

Weak bike, the components used in it are pathetic, they are simply made of crap, and they have to be replaced every 4 months of poor riding, the only advantage is the durability of the frame and handlebar stem, tire wear is quite ok, the biggest disadvantage is how this bike was built assembled when purchased, literally tragically, the wheels were not centered, the wheels were not tightened (the wheel unscrewed itself while riding, luckily it was still holding on, otherwise I would have fallen over the handlebars at a speed of 35 km/h, in general I recommend buying a bike from some another company ..

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Manufacturing ?????

I notice that the rear tire is mounted upside down (Not respecting the direction of the arrow indicating Front and Rear), too bad!!!



I recommend

A good bike at the right price

I highly recommend it 👍

I highly recommend it 👍

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Good product.

Good product.

MTB ST 530 27.5" black ROCKRIDER

so far, after the first rides, the daughter is very satisfied

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I'm very satisfied

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Great bike!!!!

Great bike!!!!

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An unexpected surprise

Big disappointment! When I bought it, the sellers were kind and prepared, when I took it back I can say the same, I am completely satisfied with this part, but what is incomprehensible to me is that in 5, i.e. 5 months, it turned into a rattling, rattling, unusable bicycle! The previous bike was also a rockrider, which lasted flawlessly for years of use, unfortunately not this one. I took it back to the store where we bought it, but from now on I wouldn't write here anymore, because I think it's a product-related service that can't be posted here! I never thought that it would be the Decathlon where we would ever walk like this! I would like to add that they did not provide any maintenance instructions that would list what is required to validate the warranty, but due to non-compliance, the bike will not be repaired under warranty! Also, it was among the faulty parts, which is considered a warranty fault, and it was not repaired either! Thank You!

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Poor preparation before delivery to the customer.

The bike is quite good for the price, but as for the way it was delivered to me, frankly... Brakes rubbing, gears with the derailleur stops exceeding the safety margin, etc... They should hire a bicycle mechanic from Seriously, I do everything on a bike and it was even giving me nerves to see two curious people trying to adjust the brakes for about 30 minutes without success and I at home adjusted the brakes in just 2 minutes. Just like the gears... What if I were a layman and the wheel locked me with the chain coming out? Be careful with this, as these are responsible things.

Not very satisfied

Despite the price, pedals were already broken after 1 day. No problem with Decathlon's services. This was repaired without any problems. However, we notice that the quality is not really sustainable.

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Size Guide

Size Guide Visual

Additional Product Information


Bike frame : 100.0% Aluminum


The RockRider 530 was designed in Lille, France, by a team of experts and cycling enthusiasts dedicated to designing our MTB Sport Touring line.


Rockrider CGF Evo (Comfort Geometry Frame) 6061 aluminum frame for 27.5” wheels. Comfortable seating position thanks to raised steering. Seat is 5 times more flexible than a standard frame with its narrow 27.2 mm seat post. Low bottom bracket: helps keep the mountain bike stable in turns, and makes it easier to place foot on the ground. Open steering angle (69.5°): keeps mountain bike stable while riding. Short rear wheel base: bicycle is easy to turn. LIFETIME WARRANTY on the frame!

Front suspension

B'Twin U-Fit 80 fork, with 80 mm of travel and an innovative fork stiffness adjustment based on the rider's weight (121 to 230 lbs.). Durable thanks to the materials and fabrication processes used. Equipped with a mechanical spring and elastomer stoppers for maximum reliability and minimum maintenance.

Rear suspension

No rear suspension.


9 speed single-chainring


Hydraulic Disc brakes


B'Twin Sport Oversize aluminum handlebar; 660 mm (size S and M), and 680 mm (L and XL). Exclusive B'Twin aluminum stem, 70 mm (size S and M), and 80 mm (size L). Stem can be raised by up to 1.2”, with 5 settings (+0”, +0.3”, +0.6”, +0.9”, +1.2”). Semi-integrated A-headset—better sealed and integrated style. B'Twin Sport handles with grooves, 120 mm long: genuine comfort while riding.


Aero Trail Evo aluminum wheels with double-walled rims: lightweight, stiff, and durable. 27.5” diameter: the best balance of comfort and performance. Designed with 28 spokes to reduce weight while still ensuring rigidity and strength.



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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