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BTWIN Rockrider ST100 Bike £159.99 delivered @ Decathlon
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BTWIN Rockrider ST100 Bike £159.99 delivered @ Decathlon

50
Posted 8th Mar

This deal is expired. Here are some options that might interest you:

All Sizes XS/S/M/L/XL in dark grey or yellow


Ideal for your first foray into mountain-bike riding and regular family outings, the Rockrider ST100 has been designed with comfort as the top priority. Featuring a CGF frame with upright rising position, 21 speeds, 80mm suspension, ErgoFit hammock saddle with Flex seat post and 27.5-inch wheels, it provides control, durability and comfort in equal measure.
Light and rust-free alloy frame
Grippy tyres and V-brakes
Available in different sizes
PRODUCT BENEFITS
DETAILED INFORMATION
TECHNICAL INFORMATION
WHAT OUR TEAM HAS TO SAY
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.
We wanted riding with the ST 100 to be nothing but fun.
A UNISEX MOUNTAIN BIKE
The ST 100 mountain bike is designed for men and women alike.
Carefully designed down to the smallest detail, with a noticeable slope on the top tube and a very wide range of sizes (from XS:1.45m to XL: 2.00m), the ST 100's CGF frame is not only light and comfy but is also unisex.
To make the most of the improved comfort, the women of the Rockrider team recommend the 500 Women's Sports saddle that is adapted to women's morphology.
HOW DO YOU CHOOSE THE RIGHT ST100 MOUNTAIN BIKE SIZE?
Several sizes available:
XS: between 1.40 m and 1.54 m
S: between 1.55m and 1.64m
M: between 1.65m and 1.74m
L: between 1.75m and 1.84m
XL: between 1.85m and 2.00m
To adapt the bike to your height and size, try these tips:
1/ Sitting on the saddle, your 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.
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.
It features U-Fit (weight adjuster) technology so that you can adjust the stiffness according to the rider's weight 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" bike such as the ST 100 is a good choice for your first rides!
DERAILLEUR & DRIVE TRAIN: 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 pedalling.
In detail:
-Triple 22-, 32- and 42-tooth chainring + protection from grease
-Shimano TY500 front derailleur
-Shimano TY300 rear derailleur
-SRAM MRX grip shifters with speed indicator
-Shimano TZ500 7-cog, 14- to 28-tooth cassette
-Wide, sturdy KMC Z51 chain
STEM, HANDLEBAR, GRIPS: FOR GOOD HAND POSITIONING
With a stem that tilts 10° upwards, the ST 100 gives you a raised, accessible, comfortable riding position.
In detail:
- 90mm (in sizes XS and S) or 110mm (in sizes M, L and XL) aluminium stem with an angle of 10° for maximum comfort
- 620mm-wide steel handlebar, for stability and control
-"Soft touch" grips for a firm yet soft and pleasant grasp.
SADDLE: SIT COMFORTABLY!
The saddle is welded to prevent any movement of the saddle as you cycle.
Because your comfort is our top 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 ST 100's aluminium brake levers, you only need two fingers 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 ST 100 are tolerant and robust, with 27.5" double-walled 28-spoke rims (26" 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 is optimised thanks to the rounded central section, whilst the side lugs provide good grip on turns.
FLAT PEDALS
The Rockrider ST 100 mountain bike comes with flat mountain bike pedals made from hard resin for lighter weight and greater safety.
If your foot slides on the pedal, there's less risk of injury.
EASILY TRANSPORT AND STORE YOUR MOUNTAIN BIKE
Not all rides start on your doorstep. Need to take off the front wheel or transport it? 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.A bike carrier will make your life easier if you want to avoid dirtying your car.
ACCESSORIES
Your ST 100 mountain bike is delivered with a derailleur guard, chainwheel guard (to prevent your clothes from getting 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)
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
Community Updates

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Top comments
danwel08/03/2020 08:20

Genuine question....is it any good ? I’m looking for one for my son and I …Genuine question....is it any good ? I’m looking for one for my son and I’m not against spending more money if I’m going to get a better bike. He will use it on the roads and in the woods and probably have a budget of around £250


Probably not, I’ve excluded mountain in the title due to decathlon’s disclaimer,

RESTRICTED USE : Not suitable for XC, All Mountain, Enduro and BMX


IMHO this bike is intended for limited use on flat greenways or smooth park paths in summer.

The rockrider ST520 at £259.99 includes XC riding so suitable for riding bridleways canal towpaths and tamer off-road
Edited by: "whatyadoinsucka" 8th Mar
Looks poor value to me. Everything is pretty basic in component terms except they have fitted a Suntour XCT fork which scrapes in as a real fork but the rest of it is rubbish in my opinion. Personally I'd go for a rigid fork at this price point because the XCT fork doesn't really achieve much on a bike with low end drivetrain components. You may as well spend less or just spend a little bit more to get a much more capable and stronger bike. The bike is non-upgradable too, it's not a disc brake frame.

Confusing information on the description. It says 10 years guarantee on the page but still has the lifetime warranty at the top. States 120kg maximum load but they are still supplying manuals that state 100kg total load which normally dictates the certified weight limits.

decathlon.co.uk/ecu…pdf

As ever if you are a heavy rider better to buy a different brand that has far higher weight limits, some go as high as 160kg total load which is 60% more than this bike.

Best low price mountain bike I know at the moment is this one;

parkersofbolton.co.uk/col…ike

Also gooutdoors have 10% off their bikes with a code, could be some bargains there.
50 Comments
Genuine question....is it any good ? I’m looking for one for my son and I’m not against spending more money if I’m going to get a better bike. He will use it on the roads and in the woods and probably have a budget of around £250
danwel08/03/2020 08:20

Genuine question....is it any good ? I’m looking for one for my son and I …Genuine question....is it any good ? I’m looking for one for my son and I’m not against spending more money if I’m going to get a better bike. He will use it on the roads and in the woods and probably have a budget of around £250


Probably not, I’ve excluded mountain in the title due to decathlon’s disclaimer,

RESTRICTED USE : Not suitable for XC, All Mountain, Enduro and BMX


IMHO this bike is intended for limited use on flat greenways or smooth park paths in summer.

The rockrider ST520 at £259.99 includes XC riding so suitable for riding bridleways canal towpaths and tamer off-road
Edited by: "whatyadoinsucka" 8th Mar
whatyadoinsucka08/03/2020 08:22

Probably not, I’ve excluded mountain in the title due to decathlon’s dis …Probably not, I’ve excluded mountain in the title due to decathlon’s disclaimer, RESTRICTED USE : Not suitable for XC, All Mountain, Enduro and BMXIMHO this bike is intended for limited use on flat greenways or smooth park paths in summer.The rockrider ST520 at £259.99 includes XC riding so suitable for riding bridleways canal towpaths and tamer off-road


Thanks really appreciate that
Makes a change mr T.. posted a mountain bike they actually comes with pedals
Looks poor value to me. Everything is pretty basic in component terms except they have fitted a Suntour XCT fork which scrapes in as a real fork but the rest of it is rubbish in my opinion. Personally I'd go for a rigid fork at this price point because the XCT fork doesn't really achieve much on a bike with low end drivetrain components. You may as well spend less or just spend a little bit more to get a much more capable and stronger bike. The bike is non-upgradable too, it's not a disc brake frame.

Confusing information on the description. It says 10 years guarantee on the page but still has the lifetime warranty at the top. States 120kg maximum load but they are still supplying manuals that state 100kg total load which normally dictates the certified weight limits.

decathlon.co.uk/ecu…pdf

As ever if you are a heavy rider better to buy a different brand that has far higher weight limits, some go as high as 160kg total load which is 60% more than this bike.

Best low price mountain bike I know at the moment is this one;

parkersofbolton.co.uk/col…ike

Also gooutdoors have 10% off their bikes with a code, could be some bargains there.
danwel08/03/2020 08:20

Genuine question....is it any good ? I’m looking for one for my son and I …Genuine question....is it any good ? I’m looking for one for my son and I’m not against spending more money if I’m going to get a better bike. He will use it on the roads and in the woods and probably have a budget of around £250


Similar myself, my son will outgrow his current bike this year and I've been looking at the Halfords Carrera bikes but I've not got much of an idea really.

The £285 Valour or even £325 Vengeance probably as they seem mid range and although they're more expensive at the moment I've noticed they tend to have periodic special offers in my local store.

Any recommendations for these bikes please, I'm not in a rush to buy.
luke.o.zade08/03/2020 09:38

Similar myself, my son will outgrow his current bike this year and I've …Similar myself, my son will outgrow his current bike this year and I've been looking at the Halfords Carrera bikes but I've not got much of an idea really.The £285 Valour or even £325 Vengeance probably as they seem mid range and although they're more expensive at the moment I've noticed they tend to have periodic special offers in my local store.Any recommendations for these bikes please, I'm not in a rush to buy.


The btwin/decathlon bikes are good for the money. Yes, £250 gets you more. You'd expect 66% more cash to have similar gains in quality on these sorts of bike.

The one linked above is good for £250, but is heavily discounted. Decathlon prices are pretty firm all year.

For what it's worth, I have a rockrider 8.3 from 2012 and it's still in amazing shape. It was £900 back then and nearest competitive spec at the time elsewhere was £1300 (though specs have improved as has competition of course) .

Don't expect the earth and you'll be fine. But Decathlon after sales service is really good in fairness and if you live near one, I think they do a first service for free (don't quote me - it might have ceased to be an offer now!).
Bought this bike for my 8yrs old as his first bike with gears and it's been fantastic. It's been dropped, crashed and bumped and still takes more abuse so for £159 Yes it's a good bike imho and fits what I needed a bike with gears so my son can learn them before moving onto something better later. And the plus side if anything goes wrong decathlon have all the spares cheap.
luke.o.zade08/03/2020 09:38

Similar myself, my son will outgrow his current bike this year and I've …Similar myself, my son will outgrow his current bike this year and I've been looking at the Halfords Carrera bikes but I've not got much of an idea really.The £285 Valour or even £325 Vengeance probably as they seem mid range and although they're more expensive at the moment I've noticed they tend to have periodic special offers in my local store.Any recommendations for these bikes please, I'm not in a rush to buy.


If you can do your own setup and servicing the one I linked to is great value if you can't then Halfords are a good local option as are Decathlon and Go Outdoors if you have one locally. Always factor in who will service and repair the bike because there is little point buying a cheap bike from the internet if you have to pay your local bike shop a huge amount of money for repairs and servicing. Better to have them take care of it for the first year with a bike you buy from them. Halfords bikes are generally fantastic value but their repair and servicing varies by store. I would say most are competent and some are good but there are also some that deliver poor service. Try to find out what your local store is like before buying, only recent reviews and comments though as Halfords staff have a high turnover. This is also true of Go Outdoors and Decathlon and even independent local bike shops.
Would this be any good for a 10 year old is 1.45m ish, in xs, or would the wheels,frame be too big?

Oh doesnt look like they have XS left. They do have the kids version 24" cheaper for £1.29, but i think he would like the yellow/green colour better!
Edited by: "Jakena" 8th Mar
How is this a Deal, this bike is always this price regardless of free delivery or not.
The bike is a good price what it is but it's not discounted.
pvfc24708/03/2020 18:07

How is this a Deal, this bike is always this price regardless of free …How is this a Deal, this bike is always this price regardless of free delivery or not.The bike is a good price what it is but it's not discounted.


It says price drop on my
Picture
40068506-dHG3f.jpg
Edited by: "whatyadoinsucka" 8th Mar
Jakena08/03/2020 14:39

Would this be any good for a 10 year old is 1.45m ish, in xs, or would the …Would this be any good for a 10 year old is 1.45m ish, in xs, or would the wheels,frame be too big?Oh doesnt look like they have XS left. They do have the kids version 24" cheaper for £1.29, but i think he would like the yellow/green colour better!


I bought this for my tall-ish 9 yr old son in XS. The XS comes on 26' wheels, whereas all the other larger sizes are 27.5" He really likes it - nothing has gone wrong yet. Should last through to 13-14.
pvfc24708/03/2020 18:07

How is this a Deal, this bike is always this price regardless of free …How is this a Deal, this bike is always this price regardless of free delivery or not.The bike is a good price what it is but it's not discounted.


It's an ok price, the geometry looks modern so it might do well for bragging rights but its a low end freewheel drivetrain with V brakes and twist shifters which is pretty much what you expect in the sub £100 price class. You are paying an extra £60 to get basic Suntour XCT forks that doesn't really have a purpose here and a modern looking frame. It's more perceived value than real value especially as its close to the price of real mountain bikes that occasionally drop sub £200. However there is a difference here for a child the smaller frame versions are ok but the real issue is where adults buy the bike and take it off road who may weigh 3x as much as a child and the components just aren't up to being used off-road. If you make the point that it would probably be mainly used on the road then why are you buying a mountain bike with a heavy suspension fork that you have to drag everywhere. I just don't see the point of these bikes having adult sizes.
Thanks for posting; we have added this to the Highlights section
What do you guys think about a gravel bike like this?

decathlon.co.uk/rs9…tml

Riverside 900. Is it much better than the ST520? Looking to use it on tarmac, gravel, and dirt roads.
The first thing to go on these will be the grip shift. They stiffen up and become useless quickly. I wish they would just use basic thumb shifters.

The service from Decathlon is good, the bike is basic, but it should last a few years of use, its not a true "mountain bike" but I am sure it could venture off the tarmac abit.

Stretching to 300 and careful shopping should get you hydraulic discs and better gear setup.
Edited by: "mattrixdesign2" 9th Mar
danwel08/03/2020 08:20

Genuine question....is it any good ? I’m looking for one for my son and I …Genuine question....is it any good ? I’m looking for one for my son and I’m not against spending more money if I’m going to get a better bike. He will use it on the roads and in the woods and probably have a budget of around £250


As person above put this is much better option if your wanting to buy a new bike from decathlon

decathlon.co.uk/st-…tml
Spiritual_Dealer09/03/2020 20:16

What do you guys think about a gravel bike like …What do you guys think about a gravel bike like this?https://www.decathlon.co.uk/rs900-c3-id_8578872.htmlRiverside 900. Is it much better than the ST520? Looking to use it on tarmac, gravel, and dirt roads.


Looks more of a hybrid / road bike to me. If your mainly going off road then get the 520 , depends what surface you’ll mainly be on
deleted98252109/03/2020 21:32

Looks more of a hybrid / road bike to me. If your mainly going off road …Looks more of a hybrid / road bike to me. If your mainly going off road then get the 520 , depends what surface you’ll mainly be on


60% road, 20% gravel, 20% dirt
Spiritual_Dealer09/03/2020 21:45

60% road, 20% gravel, 20% dirt


So yes still majority road. I’d be tempted with that one then even though it’s more expensive. With the 520 you’d want to change the tyres really as they are mainly for off road so a lot of drag for road use
Spiritual_Dealer09/03/2020 21:45

60% road, 20% gravel, 20% dirt


Then again with gravel could be tricky maybe get the 520 and keep
The tyres ! Or don’t go on gravel !
whatyadoinsucka08/03/2020 08:22

Probably not, I’ve excluded mountain in the title due to decathlon’s dis …Probably not, I’ve excluded mountain in the title due to decathlon’s disclaimer, RESTRICTED USE : Not suitable for XC, All Mountain, Enduro and BMXIMHO this bike is intended for limited use on flat greenways or smooth park paths in summer.The rockrider ST520 at £259.99 includes XC riding so suitable for riding bridleways canal towpaths and tamer off-road


Don't worry. The ST100 will easily cope with most bridleways, towpaths and tamer off-road. My road bikes do, and my tourers. My Raleigh shopper bike from the 1970s is regularly ridden on towpaths and bridleways. I expect Decathlon are erring on the side of caution for legal reasons and to persuade people to buy a more expensive bike.
Bike looks like it’s already been ridden too hard.
For my soon to be 10 year old son ...how does this compare to this (which is my local bike shop)

cycleking.co.uk/men…tml
nickmax10/03/2020 09:36

For my soon to be 10 year old son ...how does this compare to this (which …For my soon to be 10 year old son ...how does this compare to this (which is my local bike shop)https://cycleking.co.uk/mens-bikes/ammaco-matterhorn-26-wheel-front-suspension-red.html


Neither have disk breaks so not a lot in it
deleted98252110/03/2020 09:42

Neither have disk breaks so not a lot in it


thanks
No i would never expect disk brakes at that price...but everything else is much of a muchness?
nickmax10/03/2020 09:44

thanksNo i would never expect disk brakes at that price...but everything …thanksNo i would never expect disk brakes at that price...but everything else is much of a muchness?


Not had a good look but decathlon do warranty not sure if your bike shop does also ? I’m assuming you don’t want to spend much and think he’ll grow out of it fairly quickly ? Otherwise when he stops growing I’d look to try and spend double or more and get something that will last if he’s going off road and doing jumps etc that kids do on bikes
deleted98252109/03/2020 21:28

As person above put this is much better option if your wanting to buy a …As person above put this is much better option if your wanting to buy a new bike from decathlon https://www.decathlon.co.uk/st-520-mountain-bike-black-275-id_8521013.html


Definitely a much better bike but for the money you are getting mechanical disc brakes and 80mm travel front forks. It just scrapes in as a real mountain bike though.

For £10 less the bike I linked to earlier is far superior with much better, longer lasting components and is lighter too and for £10 extra over the btwin you can also get it in a 29" wheel version rather than 27.5".

Admittedly though parkers are a box shifter and you will not be able to help you with servicing etc but the same is true of Decathlon if you don't have one locally.

40085128-rpNnU.jpg
Spiritual_Dealer09/03/2020 20:16

What do you guys think about a gravel bike like …What do you guys think about a gravel bike like this?https://www.decathlon.co.uk/rs900-c3-id_8578872.htmlRiverside 900. Is it much better than the ST520? Looking to use it on tarmac, gravel, and dirt roads.


That's a hybrid bike and must admit I like the styling but I just don't see the point of the fork it ruins the efficiency and ease of maintenance of the bike and makes it a lot heavier would have been better with a rigid fork preferably steel but even CF would have been a better option. The frame doesn't look super strong and but the bike weight is reasonable with the suspension fork so it would have been much lighter with a rigid fork.
nickmax10/03/2020 09:44

thanksNo i would never expect disk brakes at that price...but everything …thanksNo i would never expect disk brakes at that price...but everything else is much of a muchness?


The suspension will be garbage on that cycleking bike and may require regular maintenance and still fail fairly quickly. You'd be better off with a bike with rigid forks or going for a better bike.

The bike I listed earlier for £250 is a proper mountain bike available in a 16" frame size but of the two bikes you were considering the btwin is definitely better as it has a Suntour XCT fork which are ok and decent enough for some light off-road use. If your son is light then light duty drivetrain components could be ok but if he is heavier then maybe think about a stronger bike like the one I linked to.
bonzobanana08/03/2020 09:20

.Best low price mountain bike I know at the moment is this ….Best low price mountain bike I know at the moment is this one;https://www.parkersofbolton.co.uk/collections/clearance-bikes/products/riddick-rd500-650b-18-speed-alloy-mountain-bikeAlso


You missed this one then? parkersofbolton.co.uk/col…ike
001172812/03/2020 21:07

You missed this one then? …You missed this one then? https://www.parkersofbolton.co.uk/collections/clearance-bikes/products/coyote-yakama-gents-29er-29-wheel-27-speed-mountain-bike


That's great value and did see it but for the extra £20 more the Riddick bike delivers soo much more, a much higher groupset, hollowtech bottom bracket, simpler 2x drivetrain, much better fork with hydraulic damping and a better lighter frame with smooth welds. I just thought it would confuse the issue if I mentioned that one as the Riddick bike is such a huge improvement in spec for only £20 more.
This is fine for a young lad that listens to grime to ride around on. Its not gonna be good for a professional mtb rider but for riding to the shop and your mates house and the occasional light trail it's fine.
nickmax18/03/2020 00:11

https://www.evanscycles.com/mongoose-villain-2-2020-mountain-bike-EV368894This?


That's very basic, on face value it looks like it has a freehub based drivetrain suitable for a mountain bike as the gearing is 3x8 (24 speed) but when you look at the detail it says the cassette is sunrun and a quick google shows sunrun do make a 8 speed freewheel so it is probably that. That bike isn't worth £275 in my opinion and besides that is its full price it seems it isn't discounted. Personally I always try to avoid paying full price for anything. Go outdoors have a 20% off promotion at the moment.
bonzobanana19/03/2020 12:48

That's very basic, on face value it looks like it has a freehub based …That's very basic, on face value it looks like it has a freehub based drivetrain suitable for a mountain bike as the gearing is 3x8 (24 speed) but when you look at the detail it says the cassette is sunrun and a quick google shows sunrun do make a 8 speed freewheel so it is probably that. That bike isn't worth £275 in my opinion and besides that is its full price it seems it isn't discounted. Personally I always try to avoid paying full price for anything. Go outdoors have a 20% off promotion at the moment.


thanks guys
sorry to bombard you - one more for your opinion please....this is very much just a quick ride with me or my sons friends, never any had core mountain biking

cycleking.co.uk/amm…tml
nickmax19/03/2020 16:52

thanks guyssorry to bombard you - one more for your opinion please....this …thanks guyssorry to bombard you - one more for your opinion please....this is very much just a quick ride with me or my sons friends, never any had core mountain bikinghttps://cycleking.co.uk/ammaco-alpine-sport-27-5-wheel-front-suspension-mtb-grey-red.html


There's no better bike than this one at the moment and you can see there is a 16" frame version if he needs that size but its a real mountain bike with decent components.

parkersofbolton.co.uk/col…ike
thanks Bonzo - my boy is 150cm tall - so 16 inch is the way forward.
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