HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Fri Feb 08, 2013 4:12 pm 
Offline

Joined: Fri Feb 08, 2013 4:10 pm
Posts: 3
Hi,

I would like to share my experience with nubuk hubs (built by chosen).

I bought a complete 29er wheel set last year, just like this one :

http://www.nubuk-bikes.de/teile-parts/l ... t/a-32858/

Price is very competitive but … the rear hub is crap and nubuk company do not answer to its customers !


The freehub cannot support normal use. A deformation appears after a few hundreds of kilometres. When the deformation becomes too big, it makes contact with the axle and then the freehub becomes not “free” anymore. I precise that my weight is 68 kg and that I’m not very powerfull (climber, not sprinter).

Here is a picture of the failing freehub :

Image

There is no doubt that after deformation there is failure just like what we can often see on tune’s freehub.

Surprisingly, nubuk sent me a new freehub the first time that this happen without any problem. However, it happens again and despite 10 e-mails and numerous phone calls, they do not answer me anymore. I have no answer to my problem. These freehubs are different from ZTR ones so I cannot find spare parts in my knowledge.

I am not sure that anybody could help me but at least I want to warn people to buy wheels with nubuk hubs, or even anything to this company, since they do not answer anymore when there is a problem.


Top
 Profile  
 
Posted: Fri Feb 08, 2013 4:12 pm 


Top
  
 
PostPosted: Tue Feb 12, 2013 7:31 pm 
Offline

Joined: Tue Feb 12, 2013 7:27 pm
Posts: 15
That's not a very convincing precision produced part; judging by the deformed material it suggests that the pressure is unevenly spread. One pawl engages before the others) this puts alle the stress on this one pawl, instead of spreading it evenly over all 3.


Top
 Profile  
 
PostPosted: Tue Feb 12, 2013 8:58 pm 
Offline

Joined: Fri Feb 08, 2013 4:10 pm
Posts: 3
I agree...


Top
 Profile  
 
PostPosted: Wed Feb 13, 2013 5:07 am 
Offline

Joined: Mon Jul 11, 2011 11:06 am
Posts: 204
Location: North Adelaide, South Australia
Also agree that's extremely poor despite that specific area under the pawl being thin.

It might just be the picture, but is the suface unusually textured for aluminium or just badly anodised?

_________________
Norwood & Adelaide Uni CC


Top
 Profile  
 
PostPosted: Wed Feb 13, 2013 9:35 am 
Offline

Joined: Tue Feb 12, 2013 7:27 pm
Posts: 15
that rough surface is not because of the anodizing;

It either indicates that the part is sand/glass blasted or tumbled after machining with a rough medium or that the part is molded in a sand-mold with a lost wax method. Judging by the overall quality/looks/country of origin, i suspect the latter.. (cheapest method, and while the quality of the used aluminum for this molding method can be topnotch, it usually is rather soft)

The pawls don't look like perfect machined precision either.

The relative cheap novatec hubs i'm using on my roady have got a better finish in this pawl-area than these chosen hubs.


Top
 Profile  
 
PostPosted: Wed Feb 13, 2013 9:44 am 
Offline

Joined: Fri Feb 08, 2013 4:10 pm
Posts: 3
Yes, I would said like serum, its the molding that make this surface.

Morover, I can add that there is no bearing under the pawls on contrary to hope hubs for example. Thus there is a free space between the freehub and the axle here, and the alloy can be deform. I also think that the freehub can twist because of this lack of bearing since there are also scratches of the teeth on the freehub where there are no pawls.


Top
 Profile  
 
PostPosted: Wed Feb 13, 2013 10:55 am 
Offline

Joined: Tue Feb 12, 2013 7:27 pm
Posts: 15
You could carefully tap the deformed material back, using an as large as possible rod and a hammer. (applying radial force) just make sure to support the freehub. Measure the pawls, just to be sure, and press in a steel or 7075 aluminum bushing to avoid the material from deforming any further. Good thing about pressing the material together actually makes it stronger in terms of hardness. How is the radial play on the body when it's in place?


Top
 Profile  
 
Posted: Wed Feb 13, 2013 10:55 am 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 


Who is online

Users browsing this forum: No registered users and 7 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Chosen or Powerway hubs

in Everything wheels

duckson

2

510

Fri May 09, 2014 1:38 am

saad View the latest post

There are no new unread posts for this topic. I got a problem

in Everything wheels

Bridgeman

2

385

Thu Jan 30, 2014 10:43 pm

Zen Cyclery View the latest post

There are no new unread posts for this topic. Di2 firmware problem

in Road

rokkstar

12

624

Thu Aug 28, 2014 4:03 am

tnc1970 View the latest post

There are no new unread posts for this topic. Di2 Cat eye wiring problem

in Road

yumseyo

4

291

Wed Aug 06, 2014 8:54 pm

yumseyo View the latest post

There are no new unread posts for this topic. Rotor 3D+ installation problem

[ Go to page: 1, 2 ]

in Road

Method01

15

1038

Sat Sep 27, 2014 6:02 pm

Method01 View the latest post


It is currently Wed Oct 22, 2014 3:56 pm

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB