This mountain bike was fully designed and developed at the B'Twin Village (Lille, France) and is the brainchild of an expert team of mountain bike enthusiasts.
To best meet the need for comfort and ease expressed by beginner mountain bikers, the team created, designed, and tested the ST100, involving riders at every stage of the project.
Whether you're heading out alone, with friends or family, the fun of riding the ST100 mountain bike has been approved by users!
A UNISEX MOUNTAIN BIKE
The ST100 mountain bike is suitable for both men and women.
Carefully designed down to the smallest detail, with a noticeable slope on the top tube, with a wide range of sizes (XS: 1.45m to XL: 2.00m), the CGF frame of the ST100 is light, comfortable, and very versatile.
To make the most of the improved comfort, the women of the Rockrider team recommend the 500 Women's Sport saddle that is adapted to women's morphology.
A LIGHT, COMFORTABLE, FUN 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 for both men and women.
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 whilst the low rear ensures the bike is very agile when turning.
FRONT SUSPENSION FOR CUSHIONING LUMPS AND BUMPS
The Suntour XCT 80mm front suspension is designed for slightly uneven trails and helps you overcome your first obstacles with no worries.
Its design, based on a mechanical spring, is reliable and easy to maintain. You can also easily adjust the stiffness using a dial.
REAR SUSPENSION: NONE
This mountain bike has no rear suspension. It is a "semi-stiff" mountain bike: ideal for beginners.
Compared with a full suspension bike (with rear suspension) the benefit is clear: it weighs much less so you waste less energy on flat terrain.
A semi-rigid mountain bike like the ST100 is the perfect choice for your first outings!
DERAILLEUR & DRIVE TRAIN: CHANGE CHAINRING AND COG
3 x 7 speed chainwheels, 21 speeds total!
Left (chainwheels): control ascents/descents.
Right (speeds): more precise control over your pedalling.
-Triple 22-, 32- and 42-tooth chainring + protection from grease
-BTWIN Drive train
-Microshift thumb shifters with speed indicator
-Wide, sturdy KMC Z51 chain
STEM, HANDLEBAR, GRIPS: FOR GOOD HAND POSITIONING
With the 10° angled stem, the ST100 offers a higher steering position that is accessible and comfortable.
SADDLE: SIT COMFORTABLY!
The saddle fixing (welded) of the ST100 prevents any movement of the saddle as you cycle.
Because your comfort is our next priority after safety, we've added the exclusive Ergofit saddle that's wider and with a hammock shape.
Easily adjust the height of your saddle with the Flex steel seat post, either 350mm or 400mm long (according to the bike size). Its reduced diameter of 27.2mm provides your seat with natural flexibility, 30% more than a standard solution.
V-BRAKES: CONTROL YOUR BRAKING
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 ST100 aluminium brake levers, only two fingers are needed to brake.
27.5" WHEELS & TYRES FOR DRY TERRAIN: READY TO ROLL?
Slow down without worrying about obstacles: small rocks, cracks, holes and bumps!
The wheels of the ST100 are tolerant and robust, with 27.5-inch double-walled 28-spoke rims (26-inch single-wall 32-spoke on the XS size).
Because your first tours will be on dry ground, the Dry 27.5 x 2.0 tyres are most suitable. Their performance has been optimised thanks to a faster central section, while their side lugs offer excellent traction in turns.
The Rockrider ST100 mountain bike will be supplied with resin platform mountain bike pedals for added lightness and safety.
If your foot slides on the pedal, there's less risk of injury.
EASILY TRANSPORT AND STORE YOUR MOUNTAIN BIKE
At ROCKRIDER, we know that not all rides start on your doorstep or right outside the store. You might need to transport or store your bike in a confined space (car boot, porch, etc.). To make it easier to mount / remove your front wheel, we've fitted it with a quick release system.
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 back wheel.
15.3 kg in size XS without pedals.
15.4 kg in S without pedals.
15.5 kg in M without pedals.
15.6 kg in L without pedals.
15.8 kg in XL without pedals.
COMFORT & SAFETY
We recommend that beginners wear cycling shorts with a pad (foam in the shape of a saddle) or a gel saddle cover to reduce soreness.
For longer rides, remember to take something to drink (e.g: a hydration bladder or bottle).
In all circumstances, even for a short ride, wearing a helmet is essential!
1) The components seen on the bicycle in the videos may change from the actual product. 2) The bicycle will be delivered in 95% assembled condition(Handlebar and pedals have to be assembled). The directions for the cycle assembly will be sent via mail ( if you have subscribed) and available on the product pages. The tools for assembly are provided with the cycle only for online buyers.
1) If you will need a spare part to be replaced, we have it all at our workshop. You will have to drop by our workshop to get your cycle serviced. 2)The 3-month, free checkup is valid only if the user is able to take the bicycle to a decathlon workshop. 3) All bicycle accessories need to be purchased separately.
After washing, rub with a dry cloth to remove all traces of moisture. Store your mountain bike in a cool, dry place, away from corrosive products and salty air.