Women's 27.5" Mountain Bike ST 100 - White/Pink
Enjoy touring: raised position, 80 mm suspension, hammock saddle, FLEX seat post
An ultra-strong MTB: double-walled rims, welded saddle, derailleur guard.
Fly with a light frame, 21 speeds, 27.5" (XS 26") wheels & fast rolling tyres.
Comfort for women: ergonomic saddle and fork adjustable starting at 45kg.
Adjust your weight on the fork, starting at 40kg.
ROCKRIDER offers a lifetime warranty on the frame, handlebars and stem.
Product Lifestyle Image gallery
Excellent product gone are the days of having to build it yourself
Very nice bike, comfortable to ride esp with a child bike seat attached to the back. Only 1 thing was the seat isn't that comfortable so I bought a gel saddle cover and it has made all the diffrence.
We bought this for our daughter, she's only 9 yrs old but 146 cm tall. We didn't want a kid's bike for her as they tend to be very heavy with poor quality components. This bike is perfect for her now, easily rideable with plenty of saddle adjustment for a growing kid. The bike came quickly and was well packaged as you would expect. Assembly took about 5 minutes, just fit the pedals and handlebars. Tools provided are adequate for this. The fit and finish of the frame and components is superb for a bike in this price range, gears change precisely and easily, brakes work well enough and the front suspension is adjustable for rider weight. Tyres are chunky and were already inflated out of the box. If you are looking for a bike for a teen or small woman then this could be for you too. My daughter is delighted with her new bike and should get years of use out of it
A good looking bike but the breaks are rubbish ( particularly when wet) and can be dangerous. I suppose you get what you pay for. My bike got stolen and I am not getting the same one.
I would definitely recommend this bike. It is really quite lightweight and, for the price, is excellent.
She loves it....well made,just 100% exactly what she wanted. Great price
Nice looking bike and great value for money
Mechanically this is a great bike. Perfect for leisure riding, and quite well assembled in the box it comes in. However, the contact points are the most important part of a bike. That's the pedals, seat and bars. On the ST100 the saddle has no, or little adjustment for tilt. I ended up buying a new seatpost for my daughter as she was incredibly uncomfortable after only a short ride. As a bike builder and avid cycling enthusiast I was able to figure out why, the saddle was nose up! Generally a level, or slightly nose down seat is more comfortable. I'd still recommend this bike, I bought it because it fitted the purpose better than any other option, just budget for an adjustable seatpost, its a fairly standard size so easy enough to get hold of.
A superb bike and a fantastic price!
Good bike apart from the tyres. I have only been on two bike rides so far and both times I have had a puncher
great size bike for my daughter, the assistant advised us to get this size as it has bigger wheels and would last he a lot longer, great bike for the money, also came with lights and bell, we bought a water bottle and carrier that the assistant fitted when he was doing his pre deliver check.very helpful staff the bike also comes with a free service.
The twist grip gears are too hard for my daughter to turn in the direction against the spring. Levers instead of twist grip would be preferred. Good bike for the price
Bought for my daughter and she loves its perfect
Great bike and great value service was brilliant
The bike is great. Missing parts from decathlon. I had to purchase the quick release skewer to attach the front wheel as it was missing, also the band is missing to attach the rear tail light. Except the missing parts. The bike is great. You might also consider a saddle cushion to avoid the soreness. 5 starts for the bike , 3 stars for decathlon for missing the assembly items.
- 100% Aluminium
Here is our guide for MTB sizes.XS:between 1.40m and 1.54mS: between 1.55m and 1.64mM: between 1.65 m and 1.74 m / 15.5 kg in size ML: between 1.75m and 1.84mTo fit your MTB to your 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 smaller size.
Designed and developed entirely in France at the B'Twin Village (Lille).The team observed and studied women's needs and used this to design and test the ST 100 MTB, involving mountain bikers at every stage of the process.Our aim is to make you want to jump onto your comfortable, easy-to-use mountain bike so that you enjoy every one of your rides.
We carried out studies:These included studies with the Decathlon Sports Lab, and real-world tests with hard-core women mountain bikers.The result: a bike with positioning elements designed for women!These include:- A comfortable saddle with a hollow centre that is adapted to wider hips.- An adjustable fork based on your weight starting at 45kg.- An XS frame starting at 1.40m
Because we've noticed that it's not always easy to get the right position on a mountain bike, our designers have created an entirely new frame that's easy to get onto.The CGF frame (Comfort Geometry Frame) is 100% aluminium for optimal comfort and excellent manoeuvrability. The slope angle has been designed to keep your back straight, while the low rear ensures the bike is very agile in turns.
Adjust the suspension hardness based on your weight, from 45 to 90 kg, to get over roots and stones more easily.All thanks to the UFIT concept (exclusive to Decathlon). Easy: simply turn the adjustment wheel!The 80 mm front suspension is designed for slightly uneven trails and helps you overcome obstacles with peace of mind.Its design, based on a mechanical spring, is reliable and easy to maintain.
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)+ anti-grease protection.-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
The 90mm long aluminium stem, with a 10° angle, provides maximum comfort!- The 620mm-wide steel handlebar provides stability and control.- The soft touch handles are comfortable to hold and provide good grip.
The 2 V-brakes are made of 2 callipers that exert pressure on the rim to slow or stop the rotation of the wheels.The brakes can be applied using only two fingers.One a year, check how the pads are wearing. If the grooves are disappearing, take your bike to your local store's workshop.We offer a free inspection of your mountain bike within 6 months following the purchase of your bike.
Take on your first obstacles! The wheels are effective and sturdy: 27.5", double-walled rims, 28 spokes (26", single-walled and 32 spokes in XS). The rim is lined for added durability and shock absorption. The DRY 27.5 x 2.0 tyres offer optimal performance with a rolling central part and knobs on the side to grip the ground on corners.
The Rockrider ST100 mountain bike comes with resin platform mountain bike pedals for added light weight and safety. If your foot slips off the pedal, there's less risk of bruising your shin.
Not all rides start on your doorstep.Need to remove the front wheel?It's easy thanks to the clamping lever built into the wheel.And the rear wheel?There is a nut at the back wheel to secure the bike and reduce the risk of theft.Note that a flat spanner is needed to remove the rear wheel. For safe rides, don't forget to bring anti-puncture spray.To keep your car clean, a bike rack can make your life easier.
Your ST 100 mountain bike comes with a derailleur guard, chainwheel guard (to keep your clothes from getting dirty), bell, lights, wheel reflectors and pedals.Other optional available accessories:-Front and rear mudguards (Flash MTB or 700 MTB)-Stand (500 Adult Base)-Bottle cage-Saddle bag-Rear pannier rack-Child seat (Polisport Groovy, frame mounted)-Basket-Gel seat coverAll item codes can be found on our website
The saddle of the ST 100 is welded to prevent any movement of the saddle.We recommend that beginners wear cropped bottoms or cycling shorts with a pad (foam in the shape of a saddle) or a gel saddle cover to reduce soreness. For long rides, it's always a good idea to take a drink with you (e.g. a hydration bladder or bottle) and a helmet.
Did you notice the coloured stickers over your mountain bike?Don't worry, it's not to add a touch of colour.Resistant to wear, they provide hints on how to adjust your bike:-adjusting the fork-tyre pressure-rim diameter-saddle heightWhen you head out on a ride, it's useful to have the manual directly on your mountain bike!For other information (washing, chain maintenance, etc.), please refer to our bike care guide.
To get the most from your mountain bike, you can equip it with:a pannier rack / model 500 onesec / ref 8364376a kickstand / model kickstand 500 / ref 1824001and a mudguard kit / ref 8385291
Women's 27.5" Mountain Bike ST 100 - White/Pink
Your location: City, ST
Please enter a valid city with state or zipcode. Example: San Francisco, CA or 94101
Order online for
Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
|Weight Thresholds||Shipping within California||Shipping outside of California|
|> 9 lbs||$20.00||$25.00|
|> 30 lbs||$50.00||$65.00|
|> 100 lbs||$100.00||$125.00|
|> 200 lbs||$200.00||$230.00|
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.