B'Twin Rockrider Women's ST 100 MTB
- B'TWIN Ladies
Alloy Hardtail MTB Frame with Front Suspension
- Part of the Rockrider Bikes range.
- 27.5" Wheels (V Brakes)
- 21 Speed (3 x
- Available in XS, S, M & L in White.
- Weighs 15.3kg
|Frame||Lightweight female specific aluminium CGF frame|
|Forks||80mm suspension fork with mechanical spring and adjustable using a dial|
|Fork Type||Suspension Fork|
|Wheels||27.5" double-walled 28-spoke rims|
|Tyres||Dry 27.5 x 2.0 tyres|
|Handlebars||620mm wide steel handlebar|
|Stem||Alloy stem with 10 degrees rise, 90mm length for XS/S and 110mm for M,L & XL|
|Headset||Own brand headset|
|Grips||Soft touch grips|
|Seatpost||27.2mm Flex seat post (350mm or 400mm long)|
|Saddle||Women's hammock Ergofit saddle|
|Pedals||Hard resin platform MTB pedals|
|Brakes||Two V-Brakes front and rear, 2 finger aluminium brake levers|
|Brakes Type||Caliper Brakes|
|Chainset||Triple chainset for 7 speed system|
|Front Derailleur||Microshift FD-M20 front derailleur|
|Rear Derailleur||Microshift RD-M25 rear derailleur|
|Shifters||Microshift MS25 grip shifters with speed indicators|
|Chain||KMC Z51 chain|
|Cassette||Shimano TZ500 7 cog cassette, 14 to 28 teeth|
|Number of Gears||21 Speed|
|Other Info||Comes with a derailleur guard, chainring guard, bell, lights, wheel reflectors, and pedals|
|Bike Type||Mountain Bikes|
|Size||XS, S, M & L|
Our team designed this 27.5" mountain bike especially for women getting started with mountain biking, for rides of up to 90 minutes in dry weather.
Comfort first and foremost: this ST100 women's MTB has a raised position, comfortable saddle, 27.5'' wheels (26" / XS) to keep you comfy while mountain biking. Double-wall rims and light alu frame.
User comfort: Comfort for women: ergonomic saddle and fork adjustable starting at 45kg.
Robustness: An ultra-strong MTB: double-walled rims, welded saddle, derailleur guard.
Efficiency: Fly with a light frame, 21 speeds, 27.5" (XS 26") wheels & fast rolling tyres.
Ease of use: Change speeds quickly: grip shifters & closely-spaced brakes.
Which is the right size?: Here is our guide for MTB sizes. XS:between 1.40m and 1.54m.
S: between 1.55m and 1.64m.
M: between 1.65m and 1.74m / 15.5 kg in sizem.
L: between 1.75m and 1.84m. To 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.
THE WOMEN'S ROCKRIDER MTB PROJECT: 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.
A MOUNTAIN BIKE FOR GIRLS AND WOMEN: 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 A COMFORTABLE, PLAYFUL FRAME: 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.
FRONT SUSPENSION FOR CUSHIONING LUMPS AND BUMPS: 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.
DERAILLEUR & DRIVETRAIN: HOW TO CHANGE SPEEDS: 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 STEM, HANDLEBAR, GRIPS: for comfort: The 90mm long aluminium stem, with a 10 degrees 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.
V-brakes: BRAKE EFFECTIVELY!: 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.
27.5" WHEELS & TYRES FOR DRY GROUND: READY TO RIDE?: 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.
PLATFORM PEDALS: 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.
EASILY TRANSPORT AND STORE YOUR MOUNTAIN BIKE: 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.
Accessories: : 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 cover.
Weight: XS - 140-154cm : 15.3 kg.
S - 155-164cm : 15.4 kg.m - 165-174cm : 15.5 kg.
L - 175-184cm : 15.6 kg.
XL - 185-200cm : 15.8 kg.
.. more details.
B'Twin are a popular choice of bike in the UK, partly due to their widespread distribution by Decathlon, and partly due to the value they offer. Their bikes are divided into several slightly overlapping ranges, with Triban best known for road and gravel bikes, and Rockrider gaining a reputation for high performing MTBs to suit every budget. Elops largely consist of a range of city bikes, whereas Riverside focus on hybrids. All in all, B'Twin bikes are well worth checking out given the size of their ranges; there's a model to suit most budgets.
Rockrider Mountain Bikes
Rockrider are Decathlon's off-road offerings, comprising of a series of kids bikes and adult hardtails, full suspension steeds and even a handful of high end E-MTBs.
This brand was launched in 2018, when Decathlon decided to split their B'Twin bikes into different genres. In terms of prices, there's something for everyone, with adult's MTBs starting at just over £200 and rising up to high end lightweight race bikes at nearly the £4000 mark.
If you want to ride off-road, and would prefer to buy from Decathlon, then the Rockrider mountain bike range is for you.