B'TWIN Rockrider 520 mountain bike (shimano Claris/acera , XCR Lockout Fork, hydraulic disc brakes) now only £250 @ decathlon sizes M & L only
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B'TWIN Rockrider 520 mountain bike (shimano Claris/acera , XCR Lockout Fork, hydraulic disc brakes) now only £250 @ decathlon sizes M & L only

26
Found 8th Jan 2016
. The Rockrider 520 hardtail MTB from b'Twin is a fantastic value for money mountain bike. With it's lifetime warranty 6061 alloy frame and excellent spec it really is built to last and will always put a smile on your face. The XCR lockout forks and Tektro AURIGA Comp 160 mm hydraulic disc brakes will keep you in control and added to the Shimano Acera 27 speed gears you can be confident that many miles of mountain biking on the trails will be fully rewarded.

Great spec for the Price, rare to get a lockout front suspension fork and hydraulic disc brakes (at this price usually Rim style or mechanical ie wire operated pads on disc)

26 Comments

Original Poster

Not a bad bike but not really for off-road, you.ll need deore for that, but a cheap price for the lockout fork and hydraulic brakes

got a 5£ decathlon voucher that expires in a week. If anyone wants to buy this I can give the voucher for free

whatyadoinsucka

Not a bad bike but not really for off-road, you.ll need deore for that, … Not a bad bike but not really for off-road, you.ll need deore for that, but a cheap price for the lockout fork and hydraulic brakes


If you arent going to take it off road, its just the wrong bike full stop - why carry round all that weight and rolling resistance on the tarmac?

Original Poster

dt_matthews

If you arent going to take it off road, its just the wrong bike full stop … If you arent going to take it off road, its just the wrong bike full stop - why carry round all that weight and rolling resistance on the tarmac?


fitness, just because you are on a heavier bike with thicker tyres and going far slower than those streamlined mamils on 5kg racers doesnt mean you are not pushing it and getting fitter, look at the modern trend towards fatbikes and plus sized 650Bs,
this bike would be ideal for a bigger chap for example, or someone wanting the occasional ride in the park or canal towpath with the kids.

ps. by offroad i really meant true off road [were deore is really the workhorse minimum standard you should aspire], canal towpaths and some bridleways would be ideal terrain on claris and acera gearing.
round my way, you'd struggle many true off road rides [pennines, peak district, yorkshire]
Edited by: "whatyadoinsucka" 8th Jan 2016

I did a few thousand km of XC riding, including the odd Swinley/Aston Hill visit on a bike with similar specs to this so don't believe everything you hear about it being unsuitable for "off-road". That bike, a Specialized Hardrock Sport, had a very similar spec from new (Acera drivetrain, XCM fork, Tektro 160mm discs, similar weight) but cost nearly twice the price so I'd say this was a pretty good deal, especially if you've a Decathlon store nearby for after-sales support.

I would say it's only worth buying a mountain bike if you actually intend using it as such. If all you need is a bike to go on trails/towpaths then this is overkill and you'd be better off with a hybrid or touring setup.

Yes, there is the argument that if you're buying a bike to 'get fit' then the extra weight/rolling resistance is not a bad thing, but in general you'll put the same effort in regardless of the bike, you'll just be going further, faster on the lighter, smoother-rolling one.

The lower spec Shimano stuff is pretty damn durable, it wouldn't be my major concern (forks, brakes, wheels are more important IMO, and the forks/brakes on this seem good value).

My lad and his club mates have hauked Acera spec'ed MTBs up and down trail centres and forests single track.

It ain't light, but its durable and will hold up. I must admit I like my STX and XT (and a Deore FD) but then I am a bit of a weight weenie LOL
Edited by: "mattrixdesign2" 8th Jan 2016

Original Poster

some good comments, agree it all depends on use, i ride with 3 or 4 mates and we are all on deore, slx, xt. except one mate with a cheaper norco with the lower spec components, our bikes are all riding well but the norco really has left its better days behind, its been serviced a few times and it struggles to cope, poor fork, gearing isnt too smooth.
but we ride punishing routes

They will get battered, no doubt the dearer stuff is "better", that's the thing with mountain bikes, things fall off and break, need servicing, road bikes go on and on and on.

Heat

Still waiting for my CTW voucher from work so I can get my new ride

The discussion over capabilities of the group set are pretty dumb. Yeah it's entry level kit but if you're going for this bike as you're not sure if you'll get out and ride as a beginner it's ideal. If you ride it twice and leave it in the shed and then use it to get to and from the pub once a month, so what.

If you get the bug you'll want to upgrade and buy a better bike (or upgrade the group set and forks on this) and keep this as a spare. I don't think many people who ride miles and miles off road every week will be looking at this deal and if they are they know what they want!

As an entry level mountain bike it's awesome for the price and spec.

whatyadoinsucka

Not a bad bike but not really for off-road, you.ll need deore for that, … Not a bad bike but not really for off-road, you.ll need deore for that, but a cheap price for the lockout fork and hydraulic brakes




It'd be OK for off-road riding. Acera is quite good quality. Not everyone is mad keen on mountain biking and eager to have XT for extra slick performance to save seconds in a race.

For the money, you can't beat this. Anyone who sets expectations too high with ripping through red and black runs, well, good luck with that.

If you take things more seriously, then you'll never be looking at this. It's obvious really.

I have a Rockrider 8.3 (discontinued, replaced with Rafal 720/740 at the hard-tail £900 mark in Decathlon) and it has been absolutely sublime - taken to a good few trail centres with no reliability issues at all - lock-out forks are extremely useful, more so if you can adjust the air pressures (obviously not at this price point...).

Original Poster

ebble

It'd be OK for off-road riding. Acera is quite good quality. Not everyone … It'd be OK for off-road riding. Acera is quite good quality. Not everyone is mad keen on mountain biking and eager to have XT for extra slick performance to save seconds in a race.


read further comments i ride tough demanding offroad red/black hence deore fitted on £600+ bikes is usually the way to start, if you get a cheap bike £300 to do red/black trails they will fail, and its a long walk home when they do. Plus not much fun.. stick to canal towpaths, parks and flat bridleways on a bike like this.

i now appreciate my use of the term offroad can mean many things to differenct people based on location etc
this bike will ride offroad of course, but dont push it on reds or black grading

Edited by: "whatyadoinsucka" 8th Jan 2016

whatyadoinsucka

Not a bad bike but not really for off-road, you.ll need deore for that, … Not a bad bike but not really for off-road, you.ll need deore for that, but a cheap price for the lockout fork and hydraulic brakes


[Edit - seems you consider 'off road' to be only the most extreme - I think most people looking at this bike wouldn't even really know about or be considering that.]
Depends what off road you are talking about.
I'm sure this would be absolutely fine for a lot of riding "off road" and if we're talking bridleways, forests and so on rather than a bike part, probably better than a lot of ]full suspension bikes.


Don't see why you'd "need" deore for that.
I'm still not convinced of needing Deore for more 'hardcore' stuff. Some of the cheaper stuff can be pretty sturdy, just not as light.

(For what it's worth I do prefer a better spec given the choice - my "off road" bikes are a a Scott Genius 10 and a Specialized Big Hit.)

Compared to a lot of other stuff out there at this price point, seems to be a good deal that'll also get you from A to B on road well enough too (Though I'd go for a road bike/hybrid with tall gearing and skinny tyres if I was going purely that way.)


Edited by: "_g_" 8th Jan 2016

This is a perfectly adequate bike for blue and green trails. You know, the family/beginner trails. It'll cope with a few berms and basic rock gardens etc...

Locking out the forks and slapping on some City Jet slicks, for example, turns this into a perfectly acceptable cheap commuter bike for arguably shorter distances, but still has some capability for beginner/family forest and trail rides.

As long as you keep an eye on chain/cassette wear, there's no reason this shouldn't last a good while for any rider

The 540 at £300 is also a worthy buy, looks like a better frame with better gearing, might make a good bet for future upgrades.

Thanks OP great deal

This guy seems to be managing OK offroad with this bike...http://picshare.decathlon.com/uploads/picshare/medias/600x600/40/09/dfa0e7b77f9ba347f5eb97b7122efd0713f6.jpg

Original Poster

jezzyjeff863

This guy seems to be managing OK offroad with this bike...


He's getting off to ride over that log though

I hope a sniper gets him, wearing full mamil team colours

jezzyjeff863

This guy seems to be managing OK offroad with this bike...


I've ridden similar looking stuff on a cyclocross bike (basically a slightly stronger road bike)

Had this bike a while now. Done Swinley Forest Red a couple of times, it's been ok. The thing is that 90% of the time it's a work commuter for me and I found the forks were starting to show signs of wear where I had them Locked out all the time. Have been riding with them open for a few months in the interest of not doing any more damage- which means its more effort to ride but still a very enjoyable ride.

My next commuter is definitely going to be a hybrid. I've also got a vintage racer that I'm converting to fixie in time for the summer.

Damnit, XL always sold out

Blah, Blah. So many pretentious bike snobs acting as if they know what they're talking about, especially given they are talking about bikes and groupsets they have never ridden. You don't need an £1000+ bike to ride through a forest and the feeling of satisfaction when you pass such a bike is priceless.
Wife has a 5.2 rockrider BTW and it's also a great bike.

Original Poster

john184

Blah, Blah. So many pretentious bike snobs acting as if they know what … Blah, Blah. So many pretentious bike snobs acting as if they know what they're talking about, especially given they are talking about bikes and groupsets they have never ridden. You don't need an £1000+ bike to ride through a forest and the feeling of satisfaction when you pass such a bike is priceless.Wife has a 5.2 rockrider BTW and it's also a great bike.



you say this but their is definately an optimum level before cost far outstrips benefit, maybe deore maybe slx.

the things i've noticed riding with claris / acera setups [because they are rated for touring bikes] they dont have as low a gear on the COG (granny ring), ie 32T (32 teeth) instead of the far lower 34/36T on next level shimano.
Hence if you live in yorkshire you'll struggle on many hills. If you live in flatlands you dont need anything more than a 32T
changing gear uphill is problematic you need to be selecting down gears in preperation, better spec components shift far easier and give the rider an easier gear change process.

cheaper hydraulic brakes just arent as good as more expensive ones, merlin have SLX M675 for £75 on sale, they are unbelievably good, i had some M395 acera disc brakes i liked them and they were good, but the difference is a giant leap
we wont start on frames, headsets, forks, wheels /tyres.
i'd prefer to ride a 11-12kg bike than a 16kg bike, but paying £5k for a 8kg bike probably not

but totally agree with you, give a decent rider this bike and he'll leave peeps on expensive bikes for dust..
Was amazed the last time i went to llandegla how unfit many of the fellas are with their gleaming £3000-£4000 bikes..
pushing them up simple inclines.. when a basic hardtail will climb like a mountain goat..

Nice looking machine what a bargain!.

I bought this bike in Santander to do the Camino de Santiago Norte! I took it off-road quite a lot with panniers on! It's a good strong bike with a pretty good geometry. It's really not that heavy at all. It would make a reasonable x-country starter bike. Excellent spec for the price. I was going to sell it over there but liked it so much I shipped it back.
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