XT M8000 rear derai...
 

[Closed] XT M8000 rear derailleur fubar - replace or repair?

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Having a great ride early doors in the freezing fog and fast running trails when at a really slow point I hit a stump I think which in turn pushed the derailleur up at an angle and into my wheel. It's bent the cage beyond all recognition but I think the sprung section is fine. Spoke has a slight knock so guess it's best to replace it but is it worth replacing the inner and outer cages or plump for a new XT mech?

Kudos to my mate for pulling and pushing me the 7km home.


 
Posted : 21/01/2017 9:15 pm
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£20 for cage v £60 for a new one, I don't know - personally I'd buy new - but mine is a bit scuffed and battered, my jockey wheels are a rough and it's generally looking a bit second-hand.

Oh and I'm hamfisted and probably break it.


 
Posted : 21/01/2017 9:26 pm
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I faced this dilemma. The price of the inner and outer cages, and also to replace the worn jockey wheels made it a no brainer.


 
Posted : 21/01/2017 9:27 pm
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SLX 11spd mech might be worth a look?


 
Posted : 21/01/2017 9:35 pm
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I do get the impression that they've become basically disposable items... like a lot of stuff these days 😕


 
Posted : 21/01/2017 9:36 pm
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I would go new - can you be sure rest of it (and the hanger) is not distorted - so might repair and then no good anyway


 
Posted : 21/01/2017 9:40 pm
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@orangespyderman I get the feeling Shimano would rather you didn't go taking their shit apart, at least they don't take the piss with the bits they will sell you.


 
Posted : 21/01/2017 9:45 pm
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I had similar with a Zee mech I cmashed up when it was a week old. It just felt bad trashing it.

In the end, it finished up being a not-really-zee with a sh XTR 970 carbon GS cage...

If I was doing it again, TBH I'd break the smashed mech for future spares and replace.


 
Posted : 21/01/2017 10:50 pm
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There's no guarantee the rest of the mech is undamaged, the knucles/pivots can twist if they get pulled hard enough in the wrong direction. I'd buy a new mech and keep the old one for spares.


 
Posted : 21/01/2017 10:54 pm
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P-Jay - Member
@orangespyderman I get the feeling Shimano would rather you didn't go taking their shit apart,
Shimano publish a maintenance routine for rear mechs that involves taking them apart.


 
Posted : 21/01/2017 11:00 pm
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Bugger. The rest of it looks ok but I cannot be sure it's not bent in some way. On Madison it's more like £30 for both bits; well annoying. Jockeys are barely used.

I had a cunning plan to buy a new one for my FS bike, get the cages, do up the knackered mech from today and whack on the hardtail (which I'm slowly buying 1x11 parts for) but £30 for two bits is a bloody smack in the nuts.

SLX tends to be more than XT currently.


 
Posted : 21/01/2017 11:02 pm
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£46 for an SLX off Mantel right now. Ive used both quite alot and I can't say I can tell any difference, and the SLX is prettier.


 
Posted : 22/01/2017 9:20 am
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Yeah, it's weird at the moment with a lot of UK shops, XT is already discounted for age, SLX is new so it's still expensive, XT was cheaper than SLX when I got my last one.


 
Posted : 22/01/2017 11:46 am
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When SLX came out the prices went up alot thanks to Brexit, however alot of XT stock was already in the system bought at a much lower price. When you apply x margin to old XT pricing, and new SLX pricing, XT is working out cheaper or about the same.


 
Posted : 22/01/2017 12:51 pm
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Mantel?


 
Posted : 22/01/2017 1:45 pm
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Mantel? They ok? Also says up to 40T - that's front ring, right?


 
Posted : 22/01/2017 2:26 pm
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No, cassette...


 
Posted : 22/01/2017 2:28 pm
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Have you access to a vice to straighten the old plates?


 
Posted : 22/01/2017 2:35 pm
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Mantel is fine yes - ordered off them before. 41T is the max difference you can run, so thats any 1x cassette on the market right now.


 
Posted : 22/01/2017 3:23 pm
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Great thanks Ben.


 
Posted : 22/01/2017 3:29 pm
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At what point do you choose a long over a medium? 42 cassette and 32 front (oval ring on my ht)? Is it for 2x 3x?


 
Posted : 22/01/2017 3:44 pm
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Yeah long cage is for triples in the main. Even on an oval you'll never come close to blowing up a mid cage running 1x.


 
Posted : 22/01/2017 5:26 pm
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A slight after thought but I wonder if yesterday derailleur mash up was due to having a long cage on a 1x system? Unlikely?


 
Posted : 22/01/2017 5:38 pm
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Well its more likely to happen as the cage is longer, so more chance of hitting something, but the length itself won't be much of a factor outside of that.


 
Posted : 22/01/2017 5:41 pm
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Ta muchly.


 
Posted : 22/01/2017 6:54 pm