Discount ✔️ B Twin Mountain Biking Rockrider ST100, Mountain Bike, 27.5″ 🎉

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

getting away on your first mountain bike tours. Have fun as you tackle small obstacles in the great outdoors

This Rockrider ST100 has a history

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: 4’9″ to XL: 79″), 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.

How do you choose the right ST100 mountain bike size?

Several sizes available:
XS: between 4’9″ and 5′
S: between 5′ and 5’5″
M: between 5’5″ and 5’9″
L: between 5’9″ and 6′
XL: between 6′ and 6’6″

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% aluminum for optimal comfort and excellent maneuverability. The slope angle has been designed to keep your back straight while the low rear ensures the bike is very agile when turning.

FRONT SUSPENSION FOR CUSHIONING LUMPS AND BUMPS

The SUNTOUR XCT 80 mm 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 and DRIVETRAIN: CHANGE CHAINRING AND COG

3 x 7 speed chainwheels, 21 speeds total!
2 easy-to-use grip shifters on the handlebars.
Left (chainwheels): control ascents/descents.
Right (speeds): more precise control over your pedaling.
In detail:
-Triple-chainwheel 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 GOOD HAND POSITIONING

With the 10° angled stem, the ST100 offers a higher steering position that is accessible and comfortable.
In detail:
– 90 mm (in sizes XS and S) or 110 mm (in sizes M, L and XL) aluminum stem with an angle of 10° for maximum comfort
– 620 mm-wide steel handlebar, for stability and control
-“Soft touch” grips for a firm yet soft and pleasant grasp.

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 350 mm or 400 mm long (according to the bike size). Its reduced diameter of 27.2 mm provides your seat with natural flexibility, 30% more than a standard solution.

V-BRAKES: CONTROL YOUR BRAKING

2 V-Brake pads for effective braking.
These brakes are composed of calipers 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 aluminum brake levers, only 2 fingers are needed to brake.

27.5″ wheels and tires 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 tires are most suitable. Their performance has been optimized thanks to a faster central section, while their side lugs offer excellent traction in turns.

FLAT PEDALS

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 trunk, 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 wrench to remove the back wheel.

WEIGHT

33.7 lbs in size XS without pedals.
34 lbs in S without pedals.
34.2 lbs in M without pedals.
34.4 lbs in L without pedals.
34.8 lbs in XL without pedals.

ACCESSORIES

Your ST100 mountain bike is delivered with a derailleur guard, chainwheel guard (to prevent your clothes becoming dirty), bell, lights, wheel reflectors and pedals.
The frame is compatible with:
-Front and rear mudguards (Flash MTB or MTB 700)
-Stand (500 Adult Base)
-Bottle cage
-Saddle pouch
-Rear pannier rack
-Child seat (Polisport Groovy frame mounted).

COMFORT and 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!

LEGAL DISCLAIMER

To find out more about usage and maintenance information of the Suntour fork, go to the Suntour website.
From there, you will be able to download the instructions manual for your component:
http://www.srsuntour-cycling.com/fr/service/zone-de-telechargement/consumer-downloads/bike/owners-manuals/general-fork-manual/

Composition

Bike frame : 100.0% Aluminum

Cycling comfort : Enjoy: the high position (CGF frame),80 mm 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

Easy to use : Change speeds quickly thanks to the grip shifters

Lifetime warranty : Rockrider offers a lifetime warranty on the frame, handlebars and stem