Shimano XT M8000 rear dérailleur updated Long-term review

This post is in the process of being updated.

Wet EXT RF Atlas Catalyst - 2017 upgraded Nr1 2014 Fuel EX 7 29er_0404
IMG_20161011_203005722
With the original link & jockey wheels
Rebuilt XT m8000 on Trek 6300_1595
XT M8000 KMC x11 DLC - 2017 upgraded Nr1 2014 Fuel EX 7 29e_0329

This part seems to be made of some sort of plastic composite.

The wire clamp is a weak point, not only because the plate bends, but if the threads fail, due to a hard impact or whatever reason, you need a new rear dérailleur. The wire plate bent to the point of the wire slipping, but I managed to bend it back on a bike path, but I flipped it, and used it for several months without issues, But I ordered Spare anyway.

I replaced the seal, as it lost some of the elasticity & stiffness, the bolts holding the cover in place held up well.

I changed the whole clutch assembly, not only the axle, I noticed the original spring lost the stiffness, the new one was a lot stiffer.

The scratches you see on pull arm is was caused by the chain grinding on it, it was when I had Bontrager Duster 29 on the bike, which was not good for 11 speed as the cassette was further in than the Hope Pro 4 Enduro wheel, Hope Pro 4 hubs are 11 speed compatible freehub, which places the cassette further outwards giving you better chain line & eliminating back pedalling chain drops. Even though there are some scrapes I have not had a hard crash with it yet. Time will tell how it will hold up, But I will not use it as much as it will go on the trek 6300, which I only use as a spare, But so far there has not been any significant damage from the small spills.

Shimano Xt M8000 Rear derailleur_0405
Shimano Xt M8000 Rear derailleur_0413_DxO
Shimano Xt M8000 Rear derailleur _0314
Shimano Xt M8000 Rear derailleur _0306
Shimano Xt M8000 Rear derailleur_0308
Shimano Xt M8000 Rear derailleur_0358
Shimano Xt M8000 Rear derailleur _0343
Shimano Xt M8000 Rear derailleur_0363
Shimano Xt M8000 Rear derailleur_0601
Shimano Xt M8000 Rear derailleur_0633
Shimano Xt M8000 Rear derailleur_0627
rebuilt XT M8000 Speed rear deraileur _0443

The clamping plate eventually bent after few months, eventually the wire slipped, and I I had get it straightened enough to be usable, and then I put it back with the wear to the top, eventually the plate was straighter, but I eventually installed new plate just in case, to me it seems like the wire is bending the plate after long little by little, it seems like a flawed design. also the nut bolt trough plate design is no longer in use as on previous XT so the threads are in swing arm not in a nut.

Fully assembled, seal for cover for the clutch replaced, wire clamping plate, the seal hood for the clutch adjustment, which also eventually wore out like the original, hopeless, it wears out fast, and eventually falls off.

here you can see the new plate installed

XT wire bolt - 2017 upgraded Nr1 2014 Fuel EX 7 29e_0321
Hope 11T- 2017 upgraded NR 1 2014 Fuel EX 7 29er_0312

Better jockey wheels installed..

Hope 11T- 2017 upgraded NR 1 2014 Fuel EX 7 29er_0307
Hope  KMC - 2017 upgraded Nr1 2014 Fuel EX 7 29er_0210
XT Hope  KMC - 2017 upgraded Nr1 2014 Fuel EX 7 29er_0195

Did the 2014 Trek fuel ex 7 damaged the RD? or was it faulty?

The axle failed & the chain got bent, So first I tried warranty, but that did not work, but later, I became quite sure it was my frame that caused it. The Rd still had some life in it, So I ordered spares from SJS Cycles, but Shimano Norway would not warranty it as there was another damage, which actually is just cosmetic damage.

I am quite sure now the reason cage axle failed, was it due to major flex in the 2014 Fuel ex 7 frame under pedalling load? or was it faulty cage axle? I Don’t know.

Flickr album

Cons:

  • no use of bearings or bushings, causing shorter lifetime, which is a compromise.
  • not well optimized for wide range cassettes, So the use of goat link or similar is necessary, but if doing so, it performs very well.
  • plastic jockey wheels which wear a lot faster than metal
  • The clutch lever is plastic and is flimsy, it bends.
  • the bolts are quite fragile, the head damages easily, the tolerances between the tool and the bolt is not great, there is a wiggle room, causing the bolt to wear, even with most accurate tools out there it won’t solve the issue as the bolt head it self is the issue, but having it will definitely help, it’s the case for all of the bolts.
  • Plastic clutch switch is flexy and fragile it seems, I have seen pictures online of it snapped, impacting it might snap it, I haven’t done it, I don’t smash Rds often, if I do any damage it’s just scratching.
XT RD m8000 Clutch lever _20170221_111429205

Pros:

  • good shifting performance, if the clutch is well adjusted, by having a hard clutch you get harder lever action, so optimising it for you is important, I can’t have it super hard, the shifting performance is good with the Xt m8000 cassette, but also with the SunRace cassette, but the Sunrace cassette, has back-pedalling issues So I can’t recommend it.
  • very easy to service the clutch.

2019 update: the spring is not as strong as on Box One first gen, which was so strong it was fatiguing me even more than the XT M8000.

Verdict:

I will use the Xt Rd for a while, to not fatigue my thumb as much with Box One but I think I will switch from mechanical shifter to Archer D1X electronic system to get less fatigued, because even with the lighter spring on XT M8000 it still can be too much for longer rides.

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Few weeks review: Box One 11 speed Rear dérailleur – Has potential but major has major flaws

Note that I am in the process of updating this, so this post is a bit of a mess now.

Unlike the other current options, Box One has bushings, which is great, bushings can be replaced, which is very easy to do, the rear derailleur can be fully assembled, the only thing you need is a screwdriver to remove the E clips. I wish all Rear derailleurs fully serviceable.

Going from Xt m8000 with uncut 116 link Kmc x11 Sl silver chain, I had to add 5 links, due to the bigger tension pulley, but with 34T Oval I could use stock chain length.

Smooth Shifting

The Box One Rear dérailleur has a harder spring, which increases the fatigue I get from shifting, which already was pretty bad Shimano XT M8000 rear dérailleur

The clutch was quite harsh/ stiff in the start, but it eventually wore down, so the clutch was much weaker than the Xt M8000 clutch.

I noticed the downshifts were smoother with the Box one, but this might be do to the worn clutch and heavier spring.
The lack of adjustment is a big flaw, but this is resolved with the new generation of Box One, it has completely new internally adjustable clutch.

But I haven’t found out if the spring has gotten lighter on the new generation, but it won’t matter anyway if I get Archer components DX1 electronic shifting system, which I think I will need, because I fatigue my hands by shifting.

Pros:

  • You can fully take it apart, as the swing arms have E clips, so removing them is easy with a screwdriver, So far Box does not offer every single part as a replacement.
From this side, you can see the E clips,
BOX ONE 11 Speed rear deraileur_0396
When adjusting The Limit screws I recommend using smaller separate Allen keys instead of a big Multi-tool, as the Pivot Tech Swingarm is partially covering the limit bolt, So you will scratch the paint off pretty fast.

Impacts:

I have already had the chance to smash it, on this technical section this was the result : so far it seems to be strong enough.

the composite got bit scratched and the big bolt too, but no real damage was done, , it worked as before, but had to adjust the limit bolts, the composite part replaceable, but not seen it offered as a spare yet.
Box one scratched_2120
BOX One 11 Speed RD_0215_DxO
Muc Off Dry lube_3224
Muc Off Dry lube_3228
Hazet 760n-3_20190128_140426edit

Shifting performance:

I noticed there was a difference in how stiff the springs were between the two Box One rd’s I got, one still has a stiff spring.

I prefer Shimano trigger shifter, So I use the XTR m9000, it seemed like a good combo, but the stiff spring is fatiguing.

The shifting is very smooth, it’s actually smoother than Shimano XT M8000, because of the cam clutch, it gets stiffer as the lower gear you use, but this makes the high gear as there is no clutch at all, so this means smooth shifting, but this won’t be an issue unless you ride like a madman within the top gear, so any issues are unlikely, But I read reviews saying they dropped the chain, but some of them did not use chain guides, and some of them probably rode like madmen. like

The shifting is very smooth, it’s actually smoother than Shimano XT M8000, because of the cam clutch, it gets stiffer as the lower gear you use, but this makes the high gear as there is no clutch at all, so this means smooth shifting, but this won’t be an issue unless you ride like a madman within the top gear, so any issues are unlikely, But I read reviews saying they dropped the chain, but some of them did not use chain guides, and some of them probably rode like madmen. like back-pedalling downhill in max gear, which no one normally does, or even on the flat you will feel the chain slap. I rode pretty hard and fast in technical sections and I never had any issues, but eventually it was a problem, when the bushings wore out there was so much play that it created more slack in the chain, causing chain suck.

Fitted on the bike with Uncut KMC 11x Sl silver chain:

Upgraded 2014 Trek fuel ex 7 29er Skanshytta tur 15.08.2017_0414

Product page: http://www.boxcomponents.com/Box-One-11-Speed-Rear-Derailleur

 

Cons:

There is definitely potential, Box has some great ideas, for example, use of bushings, but there some flaw that can’t be ignored.

The B Screw & threads in the body for B screw failed, it’s most likely due to alloy used, the next version comes with Forged alloy parts, so it should be more robust, it’s promising.

  • At first glance, I thought I had to adjust the B screw, But a few seconds later noticed that the screw has chewed off the edge of the hanger. Since then, I fully unscrewed it I discovered the threads were ruined, But then I discovered the B screw was switching between light and hard to turn as I unscrewed it, this was caused by the threads in hte body being completely destroyed. So I  put Xt M8000 on the bike.

this Rd is not really compatible with Trek rear dérailleur hangers, I haven’t tested it on other brands.

Box One_5057
Box One_5059
Box One_5062
Box One_5063
Box One_5055
BOX One KMC X11 SL Rock n Roll Gold lube_5029
White Lightning Clean Ride_5789
White Lightning Clean Ride_5774

The position of the B screw does not help, I am quite sure it’s the reason the hanger got so damaged, but maybe the hanger on my bike should be thicker where the B screw is, but I think the B screw position is not optimal, and the combination of the placement & not using forged alloy resulted in failure. but using the rear dérailleur with upside down B screw with nuts for extra support, seems to work well, I haven’t had the issue on the other Rd. for Shimano Xt 11-46T I used one nut, for Sun Race 11-46T I used two nuts.

  • Dislocating cam clutch spring, the spring wears out and becomes too big, and creeps out on both sides of the O ring until most of it pops out.
This is the cam clutch, the big O-ring comes on top of the spring between the gap.

Flickr Album https://flic.kr/s/aHsm1QqwHb

The jockey wheels can get grass stuck to it.

Grass Stuck in Pulley_4375
Grass Stuck in Pulley_4377
Grass Stuck in Pulley_4384
Grass Stuck in Pulley_4399
Box One loose bolt_2028

I don’t know why, but the bolt got loose, so I cleaned it and put Loctite 243 and it held on.

Box One loose bolt_2024

Some pics of the RD that did not fail:

the threads did not fail on this Rd, I know the body is not strong enough as I have seen failures by other users on Instagram, this one did not have any issues yet, but I reversed the B bolt and added nuts from reflectors for support, it has not failed the few weeks I used it a lot.

Box One_2852
Box One_2848
White Lightning Clean ride _20180927_113525
White Lightning Clean Ride_5734
KMC chainlube dry ride_3646
White Lightning Clean Ride_5738
White Lightning Clean Ride_5741
Muc Off Wet lube 28.08.2018_5135
white lightning clean ride_4356
Box One cam clutch _0015
White Lightning Clean Ride_4335
white lightning clean ride_4329
Box One_2848

Verdict:

BOX one has great potential, but the current rear dérailleur should not have been released to the public, as the product has major flaws, I hope these issues are fixed in the new generation of Box One.

So I can’t recommend Box one Rd at this stage, but I can’t really recommend any other mechanical rear dérailleur or shifter either, I really hope they will fix this issue, by offering a free rear body upgrade, which would be easy to do, & easy for the more custom to install, as the Box ONE Rd can be fully disassembled, with only a screwdriver & Allen keys.I recommend keeping up to date with Box is doing.

Photo Album: https://flic.kr/s/aHsm1QqwHb

Shimano SLX M675 Shadow Plus – Used to the end – long term review

This rear dérailleur has been on some long rides, and got some abuse, some of the abuse was from crashes, some of the abuse is from the 2014 fuel ex frame set, so I am sure it contributed to the rear dérailleur wearing out faster.

Time used:

I have ridden this rear dérailleur since 2015, some weeks in 2016 & the whole 2016/2017 winter plus one winter, and some weeks and days in the summer of 2017.

I ride a lot, I ride at least 5 days in a week (if I am well enough to),  from 1 hour few hours, depending on how I ride up to 20 plus km, sometimes less, but my point is I ride a lot.

I have mostly used this rear dérailleur with 1x setup.

Sometimes I am unlucky and crash or mess up on a technical climb, and this is why the rear dérailleur got some scratches, It had some scratches before the crash, for smaller impacts, but the last crash really shows damage, but it’s only cosmetic damage, so my conclusion is that this is a robust rear able to take a lot of abuse, but the pins and swing arms are not replaceable, So when has play you have to get a new rear dérailleur.

I crashed off a 1 m concrete wall, the cage was grinding against the wall, I had shifting issues, First I thought they might be the result of the crash, But later I found it not to be the case.

I  Did an inspection on the rear dérailleur,  I checked all the adjustment screws I took off the cage and did a service, the cage was bent, So I straightened it, but the shifting issues were still present. So I checked them, but then I checked for play, the rear dérailleur had huge play, so it was definitely the play. causing issues.

but I straightened it, but after few days of riding, I noticed shifting issues, So I checked the all the adjustment screws, but then I checked for play, the rear dérailleur had huge play, so it was definitely the play. causing issues.

after riding few weeks with, there was just too much play to do up-shifts, the play caused the Rd to hesitate on shifts.

The plastic cover took some abuse, but it held up well. This is the most abused rear dérailleur so of mine so far.

Jockey wheels:

SLX M675 comes with bad jockey wheels, but you can upgrade to proper jockey wheels, the problem with the stock jockey wheels is that the that the jockey wheel and the metal ring grind against with other and cause damage to the jockey wheel which causes it to not spin smoothly.

Even upgrading to XT jockey wheels which work better, they are not that great, Hope has better spacers, they are Labyrinth style spacers, so the bearings are more protected against contaminants.

I recommend upgrading to Hope jockey wheels or similar, with proper bearings & proper cover.