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Rockrider ST530S Full Suspension Mountain Bike 27.5"

Sale price: $400.00 Regular price: $799.00

Enjoy the comfort of the 120 mm front and rear suspension on the ST 530 S. The single chainring and the hydraulic disc brakes are your best allies for adapting to changing terrain as you ride.

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Sale price: $400.00 Regular price: $799.00

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Final Sale: No returns or exchanges

Free returns

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8555876

Product Videos

Product Features

A photo of the Rockrider ST530S Full Suspension Mountain Bike 27.5" in use
A photo of the Rockrider ST530S Full Suspension Mountain Bike 27.5" in use

Rockrider ST530S Full Suspension Mountain Bike 27.5" | This 27.5" MTB is designed for MTB rides lasting 2 to 3 hours, all year round.

Enjoy the comfort of the 120 mm front and rear suspension on the ST 530 S. The single chainring and the hydraulic disc brakes are your best allies for adapting to changing terrain as you ride.

Cycling comfort

Enjoy the raised position, adjustable stem, 120 mm suspension, & hammock saddle

Easy to use

Adjust your speed without thinking: 9-speed single-chainring drivetrain.

Directional control

Control your trajectory: hydraulic fork and brakes, tires, and a wide handlebar.


Smooth riding: lightweight aluminum frame, single chainring, and 27.5” wheels.

Lifetime warranty

ROCKRIDER offers a lifetime warranty on the frame, handlebars, and stem.

Product Lifestyle Image Gallery

Image Gallery

Rockrider ST530S Full Suspension Mountain Bike 27.5 

Rockrider ST530S Full Suspension Mountain Bike 27.5 

Rockrider ST530S Full Suspension Mountain Bike 27.5 

Rockrider ST530S Full Suspension Mountain Bike 27.5

Questions & Answers

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


Hey, I have one of these bikes and I wanted to upgrade the suspension and I’m wondering if this will fit a tapered head tube?


No, a tapered fork tube will not fit the frame. Customer needs to look for 1" 1/8 straight fork tube.

By Nicolo on June 22, 2023 | STAFF


hello, what width is the seat post on this bike? I want to install a dropper seat post.


The Seatpost is 31.4mm wide and 400mm long.

By Thierry on Aug 7, 2023 | STAFF


is it posible to replace the headset cups and if it is what size should i look for


Yes it is possible to replace the cups, but the entire headset should be replaced at the same time as the bearings are specific to the cups, as is the crown race which is attached to the fork. The cups should be 1 1/8cups

By Thierry on Aug 28, 2023 | STAFF

Product Customer Reviews

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Rockrider ST530S Full Suspension Mountain Bike 27.5
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for off-road less for the mountain

The bike feels good on the off-road but not on areas with a large slope because the pedal plate is large enough to offer important help when climbing and at the same time it is too small to offer extra speed on a straight road . I took it for suspension and it does its job very well, my back no longer hurts after a session. The tires are also off-road, on the road they feel strange, but that is quickly resolved. With small modifications :) it will be the perfect bike for me

Rockrider ST 530 S mtb black-red 27.5" ROCKRIDER


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a very good bike to advance on the mtb, the brakes stop you in a second and the suspensions are the best, I recommend changing the stock tires because they do not grip much on dirt, and putting a short power on it, otherwise an excellent bike .

Very good

The bike is very comfortable. It is open to improvement. With a new fork and middle shock absorber, it becomes a monster in your hands. The bike is super. I recommend it. By the way, the middle shock absorber did not burst. I have been using it hard for months. It is still in good shape.

Youth PB

Fork which spits grease through the oil seal but not guaranteed. 230km in fact Front and rear tires cracking, taken under warranty by getting angry to prove my good faith in storage and difficulties in actually having the tires checked to tell me that ultimately yes it is not normal. Too bad the bike corresponds well to my level and the price is very reasonable for the equipment compared to what we see in specialized stores.

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Very good but the tire…

It's been 4 weeks since I bought the bike. The gears, brakes and suspension of the bike are very good, but the tires slide like butter in rainy weather, other than that, the bike is very good.


A bicycle with good performance and a more than economical price for what it offers, the truth is, these days I have tried it and it has been spectacular. The only drawback I found was that from the factory it came with a squeak in the front wheel, but I took it to my nearest Decathlon and they fixed it in no time, plus the super friendly staff. For now I am very happy with both the service and the product, thank you very much.

Too heavy bike with bad gears

After 1 month, shifting is very difficult, despite good maintenance

An incredible bike full price performance

If you have a very good budget, I highly recommend it.

Overall disappointed.

I'm going to change bikes after 3 weeks! The bike 150 km used in the Basque forests, cracking of the crankset, doubtful transmission and already checked. Felt vibrations at the slightest stone, tire grip non-existent in turns, even uphill. Cassette too small to overcome slightly steep climbs. Braking is correct taking into account my 87 kilos. This bike is clearly not made for what DECATHLON announces in the description.


great bike


I don't know what you have with the front fork, but I didn't do anything to it and we are going very well, the rear sock is stuck, I can't turn it anymore (a friend of mine also has this problem) you should change the tires that all conditions are not good and everything else is fine

Good bike

Good bike

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Awesome bicycle

Very good product and very smooth to ride thank you decathlon

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Good product and very good service

I had to make a repair and they did it perfectly, good treatment and excellent service.

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Size Guide

Size Guide Visual

Additional Product Information


Frame (for bike): 100.0% Aluminium

Which is the right size?

Several sizes available: S: between 4'11” and 5'5”M: between 5'5” and 5'9”L: between 5'9” and 6'XL: between 6'1” and 6'7”If you are at the limit between 2 sizes: Choose the smaller size for easier steering (easier to handle) and comfort (straighter back).Choose the larger size for easier pedaling with a more stretched-out position (position more suited to performance).

Unisex frame

The ST 530 S MTB has a UNISEX frame.The ST 530's frame has been carefully designed down to the smallest detail, from the top tube's relatively pronounced slope, to the wide range of sizes (M: 5'5” to XL: 6'7”). The ST 530 S is not only lightweight and comfortable, but UNISEX as well.To make the most of the improved comfort, the women on the RockRider team recommend the 500 Women's Sports saddle, which is specially designed for the female form.

A word from the team

The ST 530 S mountain bike was fully designed and developed by our passionate MTB team at the B'Twin Village in France (Lille).A mountain bike that makes steering easier: more powerful and progressive hydraulic disc brakes, shocks, and a fork with 120 mm travel for riding over obstacles, a single chainring so you can very quickly adapt to changes in terrain, etc. MTB riders were involved at every stage of this bike's creation to make sure it works just right.

A light, comfortable frame

For less weight and more efficient pedaling, the RockRider ST 530 S frame is made from 6061 aluminum (only 6 lbs in size M without suspension). Its 120 mm rear shock uses a single-pivot system (more sensitive to small impacts, while remaining firm when encountering large impacts) and sealed bearings for a great lifespan.

120 mm front suspension

The hydraulic fork, with 120 mm travel, allows you to easily ride over more obstacles (roots, pebbles, stones, mud).The fork's built-in lockout system helps to prevent bobbing and loss of speed on faster terrain.

Rear suspension

This mountain bike has a RockRider U-Fit 120 mm spring shock absorber, specially adjusted for this frame. You can easily adjust it based on your weight, which provides you with a very good balance between sensitivity and performance.

Derailleur and drivetrain: a single chainring like the pros!

The single chainring is easy and efficient to use:1 chainring and 9 speeds. Accelerate on the flats and easily tackle the climbs. With a single lever on the handlebar, you can change gears while hardly thinking! -ROCKRIDER FC ATB 500 single chainring (32T)-MICROSHIFT ADVENT rear derailleur with medium cage -MICROSHIFT ADVENT right shifter-MICROSHIFT H092 9-cog cassette (11-42 T)-KMC Z9 wide, sturdy chain

Handlebars, stem, grips

The adjustable stem brings the ST 530 S controls to your hands. The all-aluminum ROCKRIDER stem is 70 mm (size S), 80 mm (size M/L), or 90 mm (size XL) and can be raised to 5 adjustment intervals: + 0 mm, + 7.5 mm, + 15 mm, + 22.5 mm, + 30 mm.In detail:- 720 mm oversize ROCKRIDER SPORT aluminum handlebar- ROCKRIDER ergonomic grips for good grip and a comfortable feel.


The ST 530 S saddle is welded to prevent any saddle movement as you cycle.Because your comfort is our next priority after safety, we've added an exclusive RockRider Ergofit Evo saddle that is wider and hammock shaped.Easily adjust the height of your saddle with the 400 mm long, 31.4 mm diameter seat post.

Product testing

Our engineers always have real riders test all our products in real conditions. These tests round out our lab tests and let us validate all our products before they hit store shelves.

Storage instructions

After washing, rub with a dry cloth to remove all traces of moisture. Store your mountain bike in a cool, dry place, away from corrosive products and salty air.


Lifetime (frame, stem, handlebar). Availability of spare parts: 2 years.



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

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    Minimal retail footprint

    lowers overhead and indirect costs


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