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Unlacing Wheels

Posted: Tue Apr 30, 2013 9:48 pm
by mxmort
I have a set of wheels i need to unlace but the nipples are all seized on to spokes
I want to unlace without damaging rims (buckle or make them out of round) as they will be relaced
Any help on best way to cut spokes would be awesome
Thanks

Re: Unlacing Wheels

Posted: Tue Apr 30, 2013 10:43 pm
by Mulger bill
A half decent set of linsemans pliers will see you right.

Re: Unlacing Wheels

Posted: Tue Apr 30, 2013 10:51 pm
by bychosis
+1. I've used pliers

Re: Unlacing Wheels

Posted: Tue Apr 30, 2013 10:55 pm
by mxmort
Thanks for the responses
Is there a method of which ones to cut each time so i dont wreck the rims and buckle or make them out of round

Re: Unlacing Wheels

Posted: Tue Apr 30, 2013 11:04 pm
by Mulger bill
What I've done is start at 12 o'clock then 3, 6 and 9. Move one spoke to the right and repeat until done.

Re: Unlacing Wheels

Posted: Tue Apr 30, 2013 11:06 pm
by mxmort
Cool thanks for the input

Re: Unlacing Wheels

Posted: Tue Apr 30, 2013 11:45 pm
by jacks1071
mxmort wrote:I have a set of wheels i need to unlace but the nipples are all seized on to spokes
I want to unlace without damaging rims (buckle or make them out of round) as they will be relaced
Any help on best way to cut spokes would be awesome
Thanks


I use a grinder (with safety glasses)

Re: Unlacing Wheels

Posted: Wed May 01, 2013 11:03 am
by familyguy
Can you get a big screwdriver to the outer end of the nipple? Grab the spokes with a pair of vise-grips and see what you can do. If you absolutely have to cut them, do what mulger says. Are you planning on saving the hub, too? Cause cutting will put odd stresses on the flanges.

http://www.bikeforums.net/showthread.ph ... elace-hubs

Jim

Re: Unlacing Wheels

Posted: Wed May 01, 2013 3:47 pm
by human909
familyguy wrote:Cause cutting will put odd stresses on the flanges.


Can you substantiate this at all. Releasing tension (even a sudden release) on the flange doesn't seem likely to cause "odd stresses".

Re: Unlacing Wheels

Posted: Wed May 01, 2013 6:06 pm
by Dan
I've been told by a reliable source not to reuse spokes which have been fully detensioned - +1 for wire cutters.

Re: Unlacing Wheels

Posted: Wed May 01, 2013 6:15 pm
by DavidL
human909 wrote:
familyguy wrote:Cause cutting will put odd stresses on the flanges.


Can you substantiate this at all. Releasing tension (even a sudden release) on the flange doesn't seem likely to cause "odd stresses".


I also find that very hard to believe. As that would suggest that if a spoke is broken during riding that the hub will also be damaged. Also back to the OP the rim.

Just cut them all with a big pair of wire cutters or the likes. Wheels really are not that delicate.

- David.

Re: Unlacing Wheels

Posted: Wed May 01, 2013 8:42 pm
by familyguy
The source was a reputable and knowledgeable source, more with regards vintage parts. Granted, not something that wouldn't happen if you popped a couple on the road. Do with it what you will. I always unwind a few turns.

Jim

Re: Unlacing Wheels

Posted: Thu May 02, 2013 12:05 pm
by wqlava1
Dan wrote:I've been told by a reliable source not to reuse spokes which have been fully detensioned - +1 for wire cutters.


I've got diametrically opposite advice from a source that we can all look at if we have the e-book - Roger Musson's treatise on wheelbuilding.

My experience (which is probably not over a large enough number of wheels and kilometers to be statistically significant for proof for any of us) is that I've been building wheels with stainless spokes I've garnered from good quality wheelsets that have had worn out rims or freehubs, with no discernable different failure rate.

I find a 45cm set of bolt cutters to be good where I want to keep the rim or hub but not the spokes, and the wood splitter on a big stump with 6 blows spaced at 60 degrees where I am fitting the whole thing in the wheelie bin. Wear safety glasses for both these operations - old spokes may fly out from rims without rim tape, and the first blow of the wood splitter detensions the wheel in a way that may release stored energy in unexpected ways.

Re: Unlacing Wheels

Posted: Thu May 02, 2013 1:56 pm
by Dan
wqlava1 wrote:
Dan wrote:I've been told by a reliable source not to reuse spokes which have been fully detensioned - +1 for wire cutters.


I've got diametrically opposite advice from a source that we can all look at if we have the e-book - Roger Musson's treatise on wheelbuilding.


Indeed, I'd forgotten about that. Reuse if you can, and if you know the history of the wheel.

Re: Unlacing Wheels

Posted: Fri May 03, 2013 10:25 pm
by sturmey archer
Just watch out when you cut the spokes. The first ones will be under some tension and the nipple end will fly out of the wheel and the end attached to the flange will flick in or out depending on the lacing.

Re: Unlacing Wheels

Posted: Thu May 09, 2013 12:35 pm
by Mozzar
If your quick enough then you can just cut every spoke 1 by 1 without damaging the rim. Don't need to bother about moving around the rim and cutting in different spots, it just takes more time.

Re: Unlacing Wheels

Posted: Thu May 09, 2013 1:19 pm
by wqlava1
And how quick is that? I'd assume that the correct answer for the time gap between spoke release events will be given in milliseconds. :-)

You may well get away with it, but the assumption behind being "quick enough" is that the rim will indeed distort.

My experience is that taco-ing the rim to some degree will probably only happen for spoke tensions around the rim manufacturer's specified max and shallow section soft rims - but I would still be careful to avoid extra time truing the rims when rebuilding it.