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PostPosted: Sat Jul 23, 2011 12:32 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Sun Jun 06, 2010 4:21 pm
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Location: Gateway to the Lake District
I've got a hub on which two of the holes are badly stripped of thread, mainly down to cheap ti bolts I fear (rather than over tightening).

Has anybody run an M5 bolt through their rotor/hub with a nut on the inside of the hub?


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PostPosted: Sat Jul 23, 2011 12:39 pm 
Old School Grand Master

Joined: Sun Jun 27, 2010 9:37 am
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should be fine. a lot of xc racers and some dh apparently run on just 3 bolts any way.


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PostPosted: Sat Jul 23, 2011 9:02 pm 
Gold Trader / rb Rider / Special
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yeah as above (although maybe the rotor could warp?)
shouldnt be a problem
or just get the helicoil kit for it
provided you dont have tabs that arent too small


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PostPosted: Sat Jul 23, 2011 11:39 pm 
retrobike rider / Gold Trader
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I'll look into the helicoil, thanks.


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PostPosted: Sun Jul 24, 2011 12:06 pm 
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apparently Steve Peat's bike runs 3 bolts only... must be ok :D


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PostPosted: Sun Jul 24, 2011 1:04 pm 
Retro Guru
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My rear hub has 3 stripped threads. I still use 6 bolts, just with a lot of thread lock. When it dries the threaded bolt holes do seem to tighten up a fraction when the bolt is turned.
I was going to try a larger bolt but wasn't sure if the holes in the disc were big enough.
My disc hasn't warped either.


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PostPosted: Sun Jul 24, 2011 1:42 pm 
Gold Trader / rb Rider / Special
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:shock: thats crazy


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PostPosted: Mon Jul 25, 2011 8:57 am 
Retro Guru

Joined: Mon Jun 02, 2008 2:52 pm
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I'd rather leave the bolt out than have one come loose and jam the wheel. On my bike at least they pass within mm of the fork legs, if one came loose at the very least it would take a chunk out of the fork.

I think you'll be ok with 5 :D


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PostPosted: Mon Jul 25, 2011 2:25 pm 
Old School Grand Master
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Location: Herts UK
Nick C wrote:
I've got a hub on which two of the holes are badly stripped of thread, mainly down to cheap ti bolts I fear (rather than over tightening).



Which Ti bolts were these? Was the thread malformed to cause this problem?

I'm curious as I'm using cheap Ti blts off ebay - threads are cut - not rolled - and had no prblems to date;

apparently JB weld - two part epoxy filler - is as strong as metal - so the manufctuere's claim -so you owuld be able to retap the thread.

most of the bolt on hubs have small individual tabs for the rotor bolts - do not be tempoeted to fit larger bolt M6 as this may weaken the tab (mavic corssmax are know to split at that point) ; for same reason a helicoil is not a good idea. (if you hub is different to what I describe then ignore me).


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