Sram NX 12 speed rear mech

[Twistygit]

Hi, bought a new mtb last year a Nukeproof Mega, was hoping to have a year of trouble free riding but the rear mech seems to have different ideas. The problem is one of the jockey wheels keeps on dropping out, the first time I took it back to place of purchase after about a 100kms, they would not warranty it as they said it could have been knocked or anything but they managed to put it together with new wheels and bolts. The second time it happened around 300kms took it to a local bike shop (not where I bought it) and they said it would need a new rear mech which they fitted, and it’s done it again after about another 100kms. Any ideas what could be causing this? I’m absolutely sick of it and have no faith in the bike anymore.

[anonymous-user]

You aren’t the only one with issues with nx mechs

Eg

https://singletrackworld.com/forum/topic/sram-nx-r...

[Twistygit]

Checked the reviews on chain Reaction Cycles last night and it appears to be a common problem, yet when the lbs rang sram yesterday when I dropped the bike off he said that they said they were unaware of any issues.
So it appears that the threads are given up in the plate, so I wonder if there’s any fix as I can’t be affording £130 every 150kms

[Court_S]

Twistygit said:

Checked the reviews on chain Reaction Cycles last night and it appears to be a common problem, yet when the lbs rang sram yesterday when I dropped the bike off he said that they said they were unaware of any issues.
So it appears that the threads are given up in the plate, so I wonder if there’s any fix as I can’t be affording £130 every 150kms

SRAM warranty isn't what it used to be now Fisher and Zyro have merged.

I'd be upgrading to a GX mech; they're £84 from CRC. Mine last one was three years old when I replaced it (it was replaced because I bent it in a crash).

[Twistygit]

Yeah I seen that the GX wasn’t much more than the NX.

And like you all my other rear mechs have lasted about 5000miles and changed because they were worn. But they were also Shimano!
I wondered how much it would cost and if it’s possible to fit Shimano on

[ferrisbueller]

I've been looking at a few bikes with the NX mech. Should I look elsewhere?

ETA Norco Fluid, Trek Roscoe, Scott Scale etc.

Edited by ferrisbueller on Wednesday 21st August 22:59

[BRR]

ferrisbueller said:

I've been looking at a few bikes with the NX mech. Should I look elsewhere?

ETA Norco Fluid, Trek Roscoe, Scott Scale etc.

Edited by ferrisbueller on Wednesday 21st August 22:59

from the reviews i've seen you'd be better off finding a GX or Shimano equipped bike, or buy the NX bike and budget for a GX mech upgrade

[ferrisbueller]

BRR said:

ferrisbueller said:

I've been looking at a few bikes with the NX mech. Should I look elsewhere?

ETA Norco Fluid, Trek Roscoe, Scott Scale etc.

Edited by ferrisbueller on Wednesday 21st August 22:59

from the reviews i've seen you'd be better off finding a GX or Shimano equipped bike, or buy the NX bike and budget for a GX mech upgrade

Bugger. The Roscoe, for example, goes from Deore 6000 10sp to NX 12sp as you go from v7 to v8.

I've been looking at getting something in the sales and the NX seems to be default on many bikes at that level.

[Twistygit]

Do you think that the GX is a better option?
Has anyone heard of sram have addressed the problem with the NX

[ferrisbueller]

If it is an issue Trek haven't seen fit to move away from the NX on the 2020 bikes.

[GravelBen]

Its probably a fair point that there are a massive number of bikes around with NX now, so the bad reviews should be taken in that context.

I suspect many NX-equipped bikes are more likely to be owned by beginner/intermediate riders too (compared with advanced/expert riders being more likely to invest in more expensive bikes), so may get abused more/not be maintained as well and reveal weaknesses more often because of that. But I could be wrong on that.

This thread makes me a little smug about having GX instead though, even if I didn't know the difference when I got it! (X01 owners can laugh at me now).

If I was buying now NX wouldn't put me off, but I'd take it into account when thinking about value. And if it did break and need replacing I might spend a bit more to replace with GX instead.

Edited by GravelBen on Friday 23 August 01:30

[Court_S]

Twistygit said:

Do you think that the GX is a better option?
Has anyone heard of sram have addressed the problem with the NX

From personal experience, I’ve had no issues with my GX stuff.

A riding friend has been using NX stuff for the last 18 months or so with no issue.

Popping in a GX mech is probable the best way forward. A move to Shimano will be relatively expensive because they’re not cross compatible. I’m also not a fan of Shimano 11/12 speed stuff.

[troc]

To a certain amount, there appears to be some cross compatibility. There are quite a few people running 13 speed xt and xtr shifters with eagle rear mechs for example to get multiple shifts in both directions that the Shimano shifters allow.

[Twistygit]

Mr Gravelben, so you think it’s us amateurs why the mechs are falling to bits?
I’ve just ordered Shimano as I just can’t be doing with another one breaking. Well that’s if Shimano pass the dummy test.

[Twistygit]

And mr gravelben I don’t know why anyone would think it was acceptable to renew a rear mech every few hundred kms no matter how bad or new of a rider you are.
My 7 year old son isn’t very good at gear changing but his mech is still in one piece

[BelfastBlack]

I had the exact same problem with my NX. The top pulley wheel dropped out on a trail and when inspected the threads we're buggered. Amazingly I found all the parts and it's holding together for now but I don't think it'll last long. I'll probably push for a warranty replacement or upgrade to GX.
And no, it definitely wasn't anything to do with my amateur riding.

[Twistygit]

Belfast black, did offer me a warranty replacement but I said that if they haven’t fixed the issue I don’t want it only to happen again. So I’ve gone with Shimano, I hope this lasts better

[Ilovejapcrap]

is that whats on this trek?

https://www.trekbikes.com/gb/en_GB/bikes/mountain-...

as i nearly purchased it today

[ferrisbueller]

Ilovejapcrap said:

is that whats on this trek?

https://www.trekbikes.com/gb/en_GB/bikes/mountain-...

as i nearly purchased it today

Yes

[GravelBen]

Twistygit said:

Mr Gravelben, so you think it’s us amateurs why the mechs are falling to bits?

Didn't mean you in particular at all (I'm extremely amateur myself so not making any suggestions there!), I was just wondering if it might be a factor with problems in general being more common in the big picture.

Edited by GravelBen on Saturday 24th August 13:26