mountainbike st 100 27 5 zoll 27.5" mountain bike st 100 – Sunny Outdoors
SKU: 21678992854
mountainbike st 100 27 5 zoll

mountainbike st 100 27 5 zoll 27.5" mountain bike st 100 – Sunny Outdoors

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Description

mountainbike st 100 27 5 zoll 27.5" mountain bike st 100 – Sunny OutdoorsThis 27. 5" mountain bike is designed for getting started with MTB touring in dry weather. ROBUSTNESS An ultra strong MTB: double walled rims, welded saddle, derailleur guard. CYCLING COMFORT Enjoy touring: raised position, 80 mm suspension, hammock saddle, FLEX seat post EFFICIENCY Light frame, 21 speeds, 27. 5" wheels (XS 26"), tyres with low rolling resistance DIRECTIONAL CONTROL Steering control: V Brake calipers, tyres with side knobs LIFETIME

This 27.5" mountain bike is designed for getting started with MTB touring in dry weather.

ROBUSTNESS

An ultra-strong MTB: double-walled rims, welded saddle, derailleur guard.

CYCLING COMFORT

Enjoy touring: raised position, 80 mm suspension, hammock saddle, FLEX seat post

EFFICIENCY

Light frame, 21 speeds, 27.5" wheels (XS 26"), tyres with low rolling resistance

DIRECTIONAL CONTROL

Steering control: V-Brake calipers, tyres with side knobs
LIFETIME WARRANTY

ROCKRIDER offers a lifetime warranty on the frame, handlebar and stem

WHICH IS THE RIGHT SIZE?

Several sizes available:
XS:between 1.40m and 1.54m
S: between 1.55m and 1.64m
M: between 1.65 m and 1.74 m
L: between 1.75 m and 1.84 m
XL: between 1.85m and 2.00m
To adapt the MTB to your height and size, try these tips:
1/ Sitting on the saddle, you should be able to touch the ground with the tips of your toes.
2/ To adjust the saddle height, your knee should be slightly flexed with the foot on the pedal in the lowest position.
3/ If you're between two sizes, choose the larger size.

UNISEX FRAME

With a very marked slope on the top tube and a wide range of sizes (from XS:1.40m to XL:2.00m),

The ST 100 mountain bike frame is UNISEX.

The ST 100 mountain bike exists with the same frame in a WOMEN'S version: fitted seat, narrower handlebar, shorter stem, fork with a more flexible spring, and brake levers that are closer together.

As a WOMAN, if you choose the MEN'S model, we recommend at least purchasing the WOMEN'S SPORT 500 saddle which is fitted to the female form.

A WORD FROM THE TEAM

We created this ST 100 mountain bike at our B'Twin Village (Lille, France) especially for mountain biking enthusiasts.

Recreational mountain bikers told us they wanted comfort, effectiveness and durability. Those features were our starting point as we designed, developed and tested the ST 100 mountain bike, with real riders involved throughout the project.

A LIGHTWEIGHT, COMFORTABLE, FUN FRAME

It isn't always easy to get the right position on a mountain bike. Our designers created a frame that's easy to get onto.
The 100% aluminium CGF frame (Comfort Geometry Frame) is both comfortable and easy to handle. The slope angle has been designed to keep your back straight, while the rear bases were shortened to make the bike very agile in turns.

FRONT SUSPENSION

The 80 mm front suspension helps you get started with overcoming obstacles on slightly uneven trails easily.

Its mechanical spring is a stamp of reliability. And the fork is particularly easy to maintain.
To adjust the stiffness? It's very easy using a single dial.

REAR SUSPENSION: NONE

This mountain bike has no rear suspension.

It is a "semi-stiff" mountain bike: perfect for beginners launching themselves into their first mountain bike touring rides. Compared to a full suspension mountain bike (with rear suspension), the advantages are clear: this mountain bike is lighter; you spend less energy on flat ground.

DERAILLEUR & DRIVETRAIN:

3 x 7 speed chainrings, 21 speeds total!
2 easy-to-use grip shifters on the handlebar.
Left (chainrings): control ascents/descents.
Right (speeds): more precise control over your pedalling.

In detail:
-Triple-chainring chainset (22/32/42 teeth) + protection / grease.
-MICROSHIFT FD-M20 FRONT derailleur
-MICROSHIFT RD-M25 REAR derailleur
-MICROSHIFT MS25 grip shifters with speed indicators
-SHIMANO TZ500 7 cog cassette, 14 to 28 teeth
-Large, solid KMC Z51 chain

HANDLEBARS, STEM, GRIPS

With a stem that tilts 10° upwards, the riding position of the ST 100 is raised, accessible, and comfortable.

In detail:
-Aluminium stem, 90mm long, with a 10° angle for maximum comfort.
-620mm wide steel handlebar, for stability and control.
-Grips in "soft touch" material' for good grip and a soft comfortable feel.

SADDLE

The saddle of the ST 100 is welded to prevent any movement of the saddle.

And because your comfort is our priority after your safety, we've added an exclusive wider Ergofit saddle with a hammock shape.

Easily adjust the height of your saddle with the Flex steel seat post (350mm or 400mm long depending on the bike size). Its smaller 27.2mm diameter provides your seat with natural flexibility, 30% more than a standard solution.

V-BRAKES WITH PADS

Two V-Brake pads for effective braking.
These brakes are composed of callipers that exert more or less pressure on the rim to slow or stop the rotation of the wheels.
Thanks to the special design of the ST 100's aluminium brake levers, you only need two fingers to brake.One a year, check how the pads are wearing. If the grooves are disappearing, take your bike to your local store's workshop.

27.5" WHEELS & TYRES FOR DRY TERRAIN

The wheels of the ST 100 are tolerant and robust, with 27.5" double-walled 28-spoke rims (26" for the XS size). Start overcoming obstacles fearlessly, including small rocks, cracks, holes and bumps!
Because you're getting started with MTB touring on dry ground, this mountain bike is equipped with DRY 27.5 x 2.0 tyres. Their performance is optimised thanks to the rounded central section, whilst the side lugs provide good grip on turns.

PLATFORM PEDALS

The Rockrider ST 100 mountain bike is supplied with hard resin platform mountain bike pedals for added lightness and safety.

If your foot slides on the pedal, there's less risk of injury.

TRANSPORT & STORAGE

We added a quick release system for easily removing/reattaching the front wheel.
There is a nut at the back to secure the bike and limit the risk of theft. You will need a spanner to remove the rear wheel.
Our advice: a bike rack is an easy way to transport your mountain bike without dirtying your car.

ACCESSORIES

Your ST 100 mountain bike comes with a chainwheel guard (to protect your clothing from dirt), bell, lights, wheel reflectors and pedals.

The frame is compatible with:
-500 chainstay stand (ref. 8302792)
-100 bottle cage (ref. 8049106) and 500 bottle cage (ref. 8358133)
-Mountain bike mudguard set (ref. 8385291)
-100 saddle bag (ref. 8347394) and 500 saddle bag (ref. 8354448)
-500 pannier rack (ref. 8364376)
-POLISPORT GROOVY frame-mounted baby seat (ref.8385622), from size S

COMFORT & SAFETY

Your bike's fittings (chain, derailleur, brakes, etc.) will adjust over time. Take advantage of a free servicing within 6 months after purchase. Our technicians will carry out a 13-point inspection of your bike. Just come to your nearest Decathlon workshop with your Decathlon card and/or receipt.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 21678992854

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4.1 ★★★★★
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A
Air-cooled SF
Whiting, US
★★★★★ 5
This is a great blanket for those who prefer to be cool all night.
This is a great blanket for those who prefer to be slightly cooler all night. I have been using this for almost two months now. It's been difficult to figure out how to explain it's use. Ultimately I have figured out that it acts like a blanket, insulating and keeping you warm, however, wherever the blanket is actually resting on your skin stays cool. It took me a while to figure it out. How does an insulating blanket cool you? I'm not sure how the material actually works, but that is what it does, at least for slightly cool interior weather with a bit of humidity. I imagine in the desert it may work differently. I would say nights when a sheet may be too cold or thin, and a blanket way too hot, this is the in between. The material itself is soft and almost silky. It is made well, has a pleasant appearance on the bed, and doesn't wrinkle. So getting up in the morning it is easy to toss and make the bed. It breathes unlike a duvet cover and feather blanket, so no need to air it out so much. I have come to really love it and recommend it for anyone looking for an in between, between a sheet and comforter. I have never woken up sweating or pulling it off at night. My only experience was at first thinking I was cold but learning that I was not, only where my skin was in contact! For the quality and price, it is definitely worth giving it a try!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
Z
Zontar
Louisville, US
★★★★★ 5
Attractive Comforter That Will Keep Hot Sleepers Cool
The Bedsmile striped cooling comforter ice blanket for hot sleepers is amazing. It's cool and comfortable thanks to its unique structure. If you're a hot sleeper, then this comforter is definitely the one for you. This comforter gives you the comfort of a blanket, but manages to also keep you cool throughout the night. It's soft and it feels cold to the touch on one side and smooth and comforting on the other. This is because one side is made from nylon which feels cool because it's a synthetic, thermally conductive material that quickly draw heat away from your skin. My daughter is the lucky recipient of this comforter, and she loves it. It matches perfectly with the gray sheets and pillowcases she already has. I have to admit I had my doubts when I first pulled it out of the package and saw it wasn't thick like a traditional comforter, but so far it has exceeded my expectations. The design is very attractive, gray with white stripes on one side, and a solid gray on the other. It is the solid gray side that is made of nylon for that cooling effect. It’s lightweight without feeling flimsy, and it is well-stitched. This is a quality comforter made with top of the line material. It's Queen size and its measurements are true. The ad says it is "reversible" but the solid gray side is nylon and that is where you get the cooling benefits...plus, it looks so much better with the gray and white strips on top. I'm really happy with this bedspread, it looks great, it is made with quality materials, it is soft and silky and it does keep you cool and comfortable at night. If you're looking for a good nights sleep, I highly recommend this comforter.
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Reviewed in the United States on March 19, 2026
B
Bernard K. Skoch
Bozeman, US
★★★★★ 5
Quality design, materials, and stitching...with one annoying trait
There is a lot to love about this comforter. First, as advertised, it works. I don't know how, but on a warm day in the house it feels great to cover yourself in it and to feel its "coolness." The design is cool as well, but in a stylistic way. It's elegant and tasteful, and the colors went well with our mocha-colored walls. And the fabric color is neutral enough that it will go with a large range of colors. The fabric has a high thread count, so it looks, feels, and is luxurious. Stitching is perfect. Overall, the design and materials are superior...with one--for me, anyway--annoying characteristic: we couldn't keep the comforter on the bed. The backing material is so very smooth and shiny that the moment it was disturbed even in a slight way, this lovely blanket went instantly to the floor night after night, sliding down on that smoothness and shininess. As a result we keep it kind of rolled/folded up in the middle of the bed during the day (which is a shame because the design is so nice), and we find ourselves frustrated at night when it invariably slides off the bed! All told, this is an elegant, quality made comforter. I almost knocked a star off for its seeming inability to stay on the bed. But it looks so nice, is so well made, and actually works, that it deserves a 5-star rating. Just be ready to grab it quickly when it starts its quick slide to the floor in the middle of the night. A good value. Recommended.
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Reviewed in the United States on March 18, 2026
J
Verified Purchase
Jennie Smith
Boise, US
★★★★★ 3
Nice for cooling but not so cool with staying on the bed
Color: Black Pinstripe, Size: King(108"x90")
Definitely cooled while sleeping however due to the silky fabric it did not stay on the bed and often ended up on the floor by morning.
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Reviewed in the United States on May 7, 2026
M
MamaRagu
San Leandro, US
★★★★★ 4
Pretty nice blanket
First off I have to say that this is not exactly a cooling blanket. It is true that when you first get under it, it does feel cool. Shortly thereafter though, wherever the blanket makes contact with you it warms up to your body temperature, so it doesn’t remain cool. Still, I just moved my foot to a different area and hit a cool pocket, so it has its moments. I have to say I really like the weight of this blanket. It’s so hard to find a good blanket, that is not that thick, It is thin, which is exactly what I was looking for since I live in Florida. One side of the blanket is the “cooling“ side which is plain gray, and on the other side is a gray and white striped pattern. I’m not really crazy about the pattern to be honest. I wish this blanket came in more colors or patterns. The blanket fit my queen bed nicely - not too big or too small. For what it is, I’m not really sure I would say it’s good value for the money, but I do like this blanket.
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Reviewed in the United States on March 20, 2026

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