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Rockrider Adult ST100 27.5 Mountain Bike

Sale price: $99.00 Regular price: $399.00

Comfort first: CGF frame with raised position, 80 mm suspension, Ergofit hammock saddle with Flex stem, 27.5" wheels (26" in XS") so you stay comfortable as you ride.

Color: Select a color
Size: Select a size
Size Guide
Sale price: $99.00 Regular price: $399.00

See shipping rate at checkout

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:

  • Cycling comfort: Enjoy: the high position (CGF frame), 80mm suspension, hammock saddle, flex stem
  • Efficiency: Progress: light frame, 21 speeds, 27.5” double-walled wheels (26”1 wall in XS)
  • Precision: Control your path with tires with side lugs and V-brakes.
  • Lifetime warranty:Rockrider offers a lifetime warranty on the frame, handlebars, and stem.
Model: 8628165

Product Features

A photo of the Rockrider Adult ST100 27.5 Mountain Bike in use
A photo of the Rockrider Adult ST100 27.5 Mountain Bike in use

Rockrider Adult ST100 27.5 Mountain Bike | making it easy to enjoy the great outdoors on two wheels!

Comfort first: CGF frame with raised position, 80 mm suspension, Ergofit hammock saddle with Flex stem, 27.5" wheels (26" in XS") so you stay comfortable as you ride.

Cycling comfort

Enjoy: the high position (CGF frame), 80mm suspension, hammock saddle, flex stem

Efficiency

Progress: light frame, 21 speeds, 27.5” double-walled wheels (26”1 wall in XS)

Precision

Control your path with tires with side lugs and V-brakes.

Product Lifestyle Image Gallery

Image Gallery



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Rockrider Adult ST100 27.5 Mountain Bike, black/red Image 9 of 9

Questions & Answers

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

Question:

Is the seat adjustable on this bike

Answer:

Yes, the seat can be adjusted in height with a quick release. No tool needed

By Olivier on May 19, 2023 | STAFF

Question:

What is the weight capacity for Large and XL bikes ?

Answer:

The maximum capacity is 140kg or 300 lbs.

By Olivier on June 2, 2023 | STAFF

Question:

I could see that this cannot be returned.But if there is a shipping or manufacturer defect how do I handle it...

Answer:

Please contact our customer service team at customer.service@decathlon.com or from our contact form page. To help start your claim we will need the following information: Customer name, USS order number, Item name and documentation (images/video) of the defect you have noted in your item. Please look to provide as much detail as possible, so our team can properly review your case.

By Ashley on May 19, 2023 | STAFF

Question:

decathlon bike st 100 had a flat tire today. both the tire and the inner tube are more like broken. Where can I find the manual for the Bike to get the information the tire and inner tube for replacement. I saw the tire said: 27.5x2.00 Thanks

Answer:

Indeed you can replace the tire with 27.5 x 2 to 27.5 x 2.5 tires. for the tube I recommend this size. https://www.decathlon.com/collections/bike-tubes/products/btwin-schrader-inner-tube-275-x-19-25-x-48mm-15167?variant=1518952448013

By Olivier on June 22, 2023 | STAFF

Question:

What is the inside front fork dimension? We're looking a roof racks and we need to know if we need adapters for a 100mm mount

Answer:

The measurement inside the fork, where the hub will be placed, is 100mm.

By Nicolò on July 10, 2023 | STAFF

Question:

Is the bike true to size? For example is the small comfortable for a person at 5’4?

Answer:

Yes it is true to size. A small typically fits a person 5'1" - 5'5". Of course all people are build diffrently i.e long torso or legs - generally to sizing is accurate.

By Thierry on July 28, 2023 | STAFF

Question:

Does the bike have lights?

Answer:

This bike does not come with lights, they can be purchased seperately. The bike does come with reflectors.

By Thierry on July 28, 2023 | STAFF

Question:

What size should I order for my son? He is 6' and a half inch.

Answer:

XL will be the right size for him.

By Yann on Aug 8, 2023 | STAFF

Question:

Does the bike come assembled? Does it need any additional parts to be purchased separately (like pedals) to start riding?

Answer:

This bike come 95% assembled, you will need to put on the front wheel and adjust the seat height. It does come with everything you need to ride it, including pedals. But a kickstand and waterbottle cages would be extra.

By Thierry on Aug 15, 2023 | STAFF

Question:

It shows shipping is 200$, can i pick it up from store?

Answer:

We do not have store in the U.S. but we offer a free pick up from our warehouse if you are in the Oakland CA area

By Thierry on Aug 28, 2023 | STAFF

Question:

Whats the box total weight and dimensions?

Answer:

It depends the model and size of the bike but assume 8" Thick 32" tall and 52" wide, weight boxed is aproxamately 40lbs

By Thierry on Sep 18, 2023 | STAFF

Question:

Do you sell the individual wheels? I need a replacement for the back wheel since I don’t have equipment to true the wheel

Answer:

No we do not, I would recomend going to your local bike shop. As they typically stock a wide variety of wheels

By Thierry on Sep 26, 2023 | STAFF

Question:

I am between 5'11 and 6'0. Which bike size should i purchase?

Answer:

A large should be a good fit for you

By Thierry on Oct 5, 2023 | STAFF

Question:

I am 6’2. Is XL good for me?

Answer:

yes - perfect

By Thierry on Nov 27, 2023 | STAFF

Question:

I am 6.2 feet tall. Would XL size be a good fit for me?

Answer:

yes - perfect

By Thierry on Nov 27, 2023 | STAFF

Question:

My rear tire went flat, ive tried removing the wheel and it wont budge, most youtube videos, including decathlons showcase rear wheels of different designs than this bike, where can i find a guide on removing it?

Answer:

Make sure you loose both bolts and slide the wheel forward, with the tire completely deflated. The design is standard. A Pro trick is to also shift the bike so the chain is in the small chain ring up front, and smalles gear in the back, putting the least amount of tention on the chain making the wheel much easier to remove.

By Thierry on Nov 27, 2023 | STAFF

Question:

Does it come with all the necessary accesories and guide to help assemble the remaining part of it?

Answer:

Yes, it does.

By Thierry on Dec 20, 2023 | STAFF

Question:

When will you have the medium size available?

Answer:

Unfortuanely not, we will not be stocking this model moving forward.

By Thierry on Dec 26, 2023 | STAFF

Question:

How much is the total weight including package and all, ready for shipping? I'd need to know this is to know if It can be shipped to my country or with that courier. Thank you

Answer:

40lbs.

By Thierry on Dec 26, 2023 | STAFF

Question:

Is it possible to change the brakes to disc brakes? on my own

Answer:

Unfortunately not. The frames and forks are specically designed and reinforced to accept Disc Brakes.

By Thierry on Jan 4, 2024 | STAFF

Question:

Is there any way to get free shipping? If the product is on sale?

Answer:

Unfortunately not... sorry.

By Thierry on Jan 19, 2024 | STAFF

Question:

Is the hub a freewheel or a cassette?

Answer:

This bike uses a 7 speed Freewheel.

By Thierry on Feb 6, 2024 | STAFF

Question:

Why is this item being labeled as a "kids" bike? I'm really confused. I don't know any kids that stand 6'5" in height riding a 27.5 inch bike? That's crazy, please help.

Answer:

Ha! you are 100% correct, our apologies. We have several similar junior models and the wording was not accurately updated. This is an adult bike.

By Thierry on Mar 4, 2024 | STAFF

Question:

Do you ship to Morocco?

Answer:

Not from the US but we have Decathlon Stores in Morocco.

By Thierry on Apr 30, 2024 | STAFF

Product Customer Reviews

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10592 Reviews
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Rockrider Adult ST100 27.5 Mountain Bike, black/red Image 9 of 9
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the bike seems nice

although I didn't enjoy it for long because on the same day the thread holding the pedal in the crank broke

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MTB bike ST 100, 27.5", gray ROCKRIDER

My husband uses it, but the whole family uses a similar brand. Light, comfortable, strong.

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St100

Enough for daily use. I recommend extra protection and gloves for the saddle.

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bought for my son. Solid bike

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Mountain bike

Very comfortable and robust bicycle with very good finishes and great quality in its components

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.

Disturbing noises when driving/Switching between driving modes occurs automatically

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Good mountain bike

Good value for money

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Comfortable and good aesthetics

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Great for forest walks

Cool for the trails and the fluorescent yellow of the bike allows you to be well seen on the road

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Excellent 👍👍👍

Approx

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Good value for money bike

At the top, very nice bike to use

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Welds should be less visible

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.

.

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Excellent choice so far.

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Size Guide

Size Guide Visual

Additional Product Information

Composition

Bike frame : 100.0% Aluminum

A unisex sport bike

Available in a variety of sizes (XS: 4 ft9 Inch ~ XL: 6 ft7 Inch), the CGF frame is lightweight, comfortable, and versatile

How to choose the size of your bike?

S: 5 ft1Inch ~ 5 ft5Inch M: 5 ft5Inch ~ 5 ft9Inch L: 5 ft9Inch ~ 6 ft

Front shock absorber

The 80 mm SUNTOUR XCT front shock absorber is designed for rugged pavements, helping beginners easily cope with sporty bike rides. Mechanical springs are designed to be reliable and easy to maintain.

Transmission system

3 x 7 speed sprocket, 21 speed! Three-chain sprocket wheel (22/32/42 teeth) + grease protection - Microshift front derailleur - Microshift rear derailleur - with speedometer Microshift hand shift lever- 7 gears, 14~28 teeth Shimano sprocket

Horizontal / handle / handle

The ST100 sport bike has a 10° angled handle for a higher operating position and is easy to operate and comfortable.

Storage instructions

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

Guarantee

Lifetime on frame and rigid fork. 2 years on parts.

Origin

Imported

Law label information

Click here to see the product label

 

Size Guide Visual

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