Shimano Nexus 8 Speed Hub Reassembly - Putting It Back Together...

Hey how did you manage to get the carrier unit back together? Just asking

Good effort 👌

Fantastic work RJ! I couldn't stop watching how this transmission (basically what it is) goes back together and how it works. I thought I had the 3 speed Sturmey Archer down then this comes along and .. wow.

Loved this video

@RJTheBikeGuy can you do a nexus 7

Next stop, brain surgery!🤯 😂
Enjoyed the video thx 👍

Mechanic work is a lot like trail riding. You make it all the way over the mountain and then get thrown by one little bump.

Can you imagine the kind of brain you need to design these mechanisms.. 😵‍💫

I do not try to do teardown my 7 speed hub, it would not ever be whole again after that.

Grad jop thanks ....god luk

17.02. i need to replace that ring, found a broken piece of it when i diambled the gear my gear jumps over in 4 and 8 and make a noisy metallic sound

Great work and info

تحياتي.براغواليك.بوط.
فيتاس.بيكلة.خطير.
بيسراحة.خاص.فوق
الباك.هد.الحركات.القوية

Incredible. You are like a mad scientist! I have no idea how you can understand all the intricacies. Very impressive. I am having problems with my hub and I was hoping there would be a quick fix. Something got caught between the hub and the wheel and now when i pedal, everything slips and i can't propel the bike forward. Any ideas?

This is the best video out there showing one of these gearboxes going together. I have a nexus 7 speed that won't shift to 1st or 2nd gear.

thanks so much

Hi from Romania.
What grease use you ?
I use Total with calciu and litiu.

pls explain shimano nexus sg5r30 reassemly thank you

Very useful video! I have a Nexus 8 inter8, model number SG-C6000-8R. What I discovered is that I have a needle bearing type of clutch...so I do not have the pawls like other hubs have. I had removed the roller bearing ring and did not put enough tension on the spring when I reassembled it. The symptom I had was that when I shifted to 5th or higher, I could not pedal any longer...it locked up but the wheel kept spinning. I'd attach a photo of what my clutch looks like but I couldn't figure out how to include a photo....Thanks again!

،شكرا

Thank you so much for the teaching, but you really should wear gloves when playing around with these kinds of oils and lubricants.

Dude you are awesome! I was having the exact same probleme of standing in front of a complete disassembled hub and now i can piggyback of your video.

What could be the problem: no tension at all in the cable barrel cj-8s40?

Thnx. Used it to fix mine!!

wonderful 👍

Perfect video RJ, the other Shimano ones are almost all Russian.
I now have a Nexus 7i with a nice trigger shifter. Perfect gears for medium hills, city and highway. It came with 44/22T, too slow for me. Now going to try 18T. The stupid roller brake makes it way slower than my finicky shift SA XL-RD5w. This 5w IS the fastest hub I've ever had, done 46 mph on a 8% hill.

But I want to tell everyone to not be so afraid of a little play in ANY bearings. The 7i came tight and so did every pedal I ever bought. The 7i coasts way farther now, it was worse than my Rohloff ever was. LOL.

You were able to put it back cuz you are the inventor of that.

Amazing understanding for machinery,mechanism and gadget!
There’s no mentor about bicycle mechanism like you in Japan , though SHIMANO is made in our nation Japan😭
Thank you so much indeed. May god bless your hand and soul.
Domo Arigatou❗️

Do you think lithium grease ore marine grease would work?

Hey RJ, thank you so much for this video. Used this together with other sources in order to repair/rebuild my Inter Nexus 4 - because I hadn't taken any pictures.. Unfortunately the hub is still broken although I can't see how/where, but it didn't shift anyway when I got it. Unfortunately also my rear wheel doesn't rotate with the chain any longer. I gave up after having taken the hub apart for the 12th time ;) (I can dismantle/reassemble it in my sleep).

Thank you for the detailed videos on bike fixing!

Thanks for videos on these hubs I now can take them a part and rebuild them no problem.

I just discovered during my Shimano Alfine 8 sp. install today, after spending more time than I am willing to admit to get the shift assembly onto the hub, I was trying to put a square peg into a round hole! No matter how many videos I watched today, including this one, turns out I have the needed parts for a Nexus, NOT a Alfine, and the two are similar enough to not be noticeable (until you know what to look for) in watching a video, or many videos! I ordered my Alfine hub off Amazon , and right below they had a "needed small parts kit," but that kit is not for the Alfine. Just a heads up....

Nexus 8 shimano lots of buzzing gears are heard

.....NEVER GIVE UP!!

I have a odd question about the grease your using on everything. I was told not to use grease on internal bike hubs and to use oil. I guess the grease tends to fail quicker and cause the hub to start locking up and acting strange ect ect.

the best bicycle mechanic.

Why does everyone say this thing is too complicated? You are putting an 8 gear transmission in a rear bicycle hub. Thats not easy. Size is very limited and you want it reliable and ideally not to inefficient. The Rohloff Speedhub is a planetary bicycle transmission as well (although with 14 gears) and it is the most efficient internal bicycle hub in the world. Looks quite similar to this one.

Good video. I learned to rebuild these from the Russian video but it’s nice to see another viewpoint

Do one more on this wheel, plse.

Thank you that helped me a lot, when doing a big maintenace on my nexus intr 8 gear hub.

As always it's the cost of a rebuild versus a brand new unit....

who design this? ^ _ ^ ufo!

Does anyone know of works on a fat tire rim?

Wauw, super to see, thank you!