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Mountain Bike 26" ST 50

Sale price: $349.00 Regular price:

Raised position., stem can be raised up to 1.18 in., ergonomic saddle: comfort that also yields greater efficiency. 27.5" wheels, double disc brakes, 24 speeds.

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Sale price: $349.00 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8676828

Product Videos

Product Features

A photo of the Mountain Bike 26" ST 50 in use

Mountain Bike 26" ST 50 | sporty mountain bike rides.

Raised position., stem can be raised up to 1.18 in., ergonomic saddle: comfort that also yields greater efficiency. 27.5" wheels, double disc brakes, 24 speeds.

Cycling comfort

Raised position. Ergonomic saddle. Height-adjustable stem. Soft-touch grips.


CGF Evo aluminum frame. 24-speed SRAM X3. Light, 27.5" Aero Trail Evo wheels.


Dual disc brakes. Easy handling frame geometry. Tires have good grip in turns.

Easy to use

Innovative fork with easy adjustment based on rider's weight.

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Mountain Bike 26
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Добър за цената си

Велосипедът го кара приятелката ми. За цената си велосипедът е много добър, засега работи като часовник, въпреки че е каран по сравнително тежък терен в Странджа. Малко е тежичък обаче - около 15кг, но още не съм разбрал от кои компоненти е така. Предстоящ ъпгрейд - по-добра вилка. Забележка - наясно съм с целта на гайката на задното колело, но все пак се колебая дали задното колело все пак не е по-добре да е с автомати.

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Super jizda

Predni odpruzeni setri ruce, poradi si i se sterkem a horsim terenem

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Za dané peníze asi nelze očekávat více. Koupili jsme dvě kola pro děti a těm naprosto vyhovují.

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Levné kolo, přesto kvalitní

Horsi ovládání přehazování pro dámskou ruku, jde ztěžka. Jinak skvělý výrobek pro jízdu okolo komína.

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Za tu cenu vypadá super, syn je spokojený, uvidíme jak dlouho vydrží spokojenost.

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Dobre kolo

Dobre kolo

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Byl to dárek

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zatím trochu vržou brzdy, ale prý si to sedne kolo je delší než jsem čekala, takže je celkem problém ho dát do komory dokoupili jsme blatníky dle doporučení na prodejně a moc odstávají

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Syn používá týden, je spokojený. Bohužel se mu vymazala čísla na řazení 1-2-3


dcera velmi spokojená, zatím vše v pořádku

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Kolo odpovídá , syn spokojen

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Nákup kola

Maximální spokojenost

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Pěkné kolo na prázdniny

Dobrá koupě

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Dobře kolo za dobru cenu.

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Veliká spolojenost

Kolo dovezli už připravené, jen se museli otočit řidiltka a přidělat světélka. Zatím mám měsíc a jsem velmi spokojen. Dobrá kvalita za nízkou cenu. Určitě doporučuji.

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Additional Product Information


Bike frame

  • 100% Aluminum


The RockRider 520 was designed and created in Suzhou, China, by a team of experts and cycling enthusiasts dedicated to designing our MTB Sport Touring line. Production was also done near Suzhou to be as close to our Decathlon stores as possible.


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 thanks to a narrow 1.07-in. 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 3.15 in. 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.


SRAM S200 triple-chainring chainset (22/32/42 teeth). SRAM X3 8-speed rear derailleur. Microshift MS22 front derailleur. SRAM X4 shifters with speed indicators. SRAM PG820 cassette, 8 cogs, 11 to 32 teeth.


Tektro aluminum brake levers: lightweight and precise. Front and rear Hayes MX5 mechanical disc brake calipers: powerful, progressive braking, even in rainy and muddy conditions.


B'Twin Sport Oversize aluminum handlebar; 25.9 in. (Size S and M), and 26.7 in. (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, 4.72 in. 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.


Exclusive B'Twin All Terrain Dry 27.5" x 2.0 tires with a central tread specially designed for fast performance. Side lugs provide traction in turns. Also includes a chart showing recommended pressure levels depending on the rider's weight (see markings on tire sidewalls).

Saddle / seat post

Exclusive B'Twin Ergofit Evo saddle offers outstanding comfort thanks to its wider "Hammock" cut and good distribution of pressure points regardless of the rider's pelvis width. B'Twin Sport seat post in aluminum for less weight. 1.1". diameter provides the seat with a natural flex that's 5 times greater than a classic seat post. 400 mm long, offering a broad adjustment range.


Bicycle comes with mountain bike platform pedals with bearings, made from hard resin for lower weight and greater safety (less aggressive in case of pedal that slips).


31.63 lbs in S without pedals. 31.8 lbs in M without pedals. 32.1 lbs in L without pedals.


Frame can take a bottle cage, saddle bag, mud guard, stand, pannier rack.

User guide & bike assembly

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Warning - california prop 65

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Product testing

We also recommend that beginners wear cycling shorts with a protective pad and/or a gel saddle cover to reduce soreness.

Storage instructions

Store in a cool, dry place, away from corrosive products and salty air.

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
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    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