Trek rail 7 locking nut issue

[Simple85]

hey all I have had problems with the locking nut coming lose Iv gone throw 2 rings all ready I up graded to the hope 34t chain wheel and the lock ring does not tighten all the way up on the thread and works it way off while ridding any one else got the hope front sprocket on ??

 

[slomtbr]

I also did this - it'll never come loose again.

Bosch CX gen 4 chainring nut

Chainring nut / spider nut or other names... Has anyone experienced their chainring nut coming loose? Today is the first day my Rail has let me down, I had to cut my ride short today when I felt a vibration at my feet, checked the chainring and it was wobbling and the spider nut had come...

www.emtbforums.com

 

[Simple85]

I also did this - it'll never come loose again.

Bosch CX gen 4 chainring nut

Chainring nut / spider nut or other names... Has anyone experienced their chainring nut coming loose? Today is the first day my Rail has let me down, I had to cut my ride short today when I felt a vibration at my feet, checked the chainring and it was wobbling and the spider nut had come...

www.emtbforums.com

Hi thanks for that I’m waiting on new parts but I found there is a alloy sleeve just in on the spine and looks like the hope Chainwheel had this same sleeve built on to it so hope that’s why the thread was not fully tight I’m going to removed the sleeve on the spine so the chain wheel goes in more flush

 

[DeRailled7]

Hi and Happy New Year!
my friend and i had the same problem. First and easiest thing to try is to simply apply a good coat of treadlock when you install your chainring back on. I have ridden over 1300km since i did that fix and has had no issues yet.
cheers

 

[SydB]

Hi
I had the same problem when I fitted a hope ring, remove the spacer and it will allow the nut to fit fully on the threads. As you said the spacer appears to be built into the hope ring.

 

[Simple85]

Hi
I had the same problem when I fitted a hope ring, remove the spacer and it will allow the nut to fit fully on the threads. As you said the spacer appears to be built into the hope ring.

Yes ur right shame I didn’t know bout this form before Iv gone throw to lock nuts and the 2nd time it rip off the chain pulled on the front chain wheel and bent it so bout 100 pound down aha oh well you live a learn hopefully if any one else’s see this that it’s happing to there see why

 

[Simple85]

Hi and Happy New Year!
my friend and i had the same problem. First and easiest thing to try is to simply apply a good coat of treadlock when you install your chainring back on. I have ridden over 1300km since i did that fix and has had no issues yet.
cheers

Hi mate yes this is definitely what I will be doing from now on thanks for info

 

[Ebike mad]

Hi all I changed my chain ring to a 38 T on my rail 7 and up graded the chain the rubber o ring had split but not really needed , you must use lock tight on the spider nut
Never had any problem since, I always check
Before I ride

 

[Mikerb]

Given the small number of threads on the lock ring I suspect it is single use only. A new lock ring is only £7 .....I would fit a new one rather than rely on loctite.
Bosch part no 1270014085 Lock ring for BDU 4XX