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, But I think I will try the E thirteen cassette, with 9-46T and go down to 32 T chainring for better range, and low weight.
Because the clutch(CamClutch) is not as strong in the higher hears as in the lower gears, it improves shifting greatly, over clutch systems like on Shimano m8000 or previous Shimano models,The shifting is so smooth that I can’t feel it, so going from Xt M8000 to Box one you might think the rear dérailleur is not shifting properly but if you take a look it actually did shift( I use a Xt M8000 11-46T Cassette with Both Rear dérailleur’s) I used This also makes the lever action lighter.
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.
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.
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, good combo.
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
I prefer Shimano trigger shifter, So I use the XTR m9000, good combo. 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.
Fitted on the bike with Uncut KMC 11x Sl silver chain:
and now the bad things:
The flaw that can’t be ignored.
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.
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.
Flickr Album https://flic.kr/s/aHsm1QqwHb
BOX one has great potential, but the current rear dérailleur should not have been released to the public, as the product has major flaws, which hopefully will be fixed in the next version.
So I can’t recommend Box one Rd at this stage, but I can’t really recommend any other rear dérailleur 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, as maybe they will make the perfect Rd in the future.