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 Post subject: Re: Truing a bent wheel
PostPosted: Mon Feb 18, 2013 11:31 pm 
Dirt Disciple

Joined: Mon Jan 28, 2013 3:28 pm
Posts: 40
Antfox wrote:
Raging_Bulls wrote:
Antfox wrote:
I was always told three spokes at a time .


That's how I do it. Quarter turn on the middle of the bent area, 1/8 turn on the next spokes on that side. If that isn't enough, I'll check spoke tension to determine if I need to tighten them or loosen the other side.


That's exactly it !


Haha ok this is interesting. I read to do either 2, 4 or 6 at a time etc. I think that's what the guy says in the video that I posted! In order to keep the tension equal on both sides, which makes sense to me. So why do you lot do 3 at a time?


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 Post subject: Re: Truing a bent wheel
PostPosted: Mon Feb 18, 2013 11:34 pm 
Retro Guru

Joined: Sun Jul 19, 2009 7:14 pm
Posts: 619
Location: Staffordshire
To be honest a wheel builder told me to do it that way , he wheels were always so strong !


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 Post subject: Re: Truing a bent wheel
PostPosted: Tue Feb 19, 2013 2:21 am 
Retro Guru
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Joined: Thu May 08, 2008 4:18 pm
Posts: 2336
I can't see the deflection of the rim for less than 1/4 of a spoke turn, so I see no point turning them less than that :)


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 Post subject: Re: Truing a bent wheel
PostPosted: Tue Feb 19, 2013 12:29 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8204
Location: New Forest, UK
I agree with the 3 spokes / quarter turn - although I might do 5 or even 7 spokes depending on how big the bulge is - typically a group of 7 is only when a wheel is first built.


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 Post subject: Re: Truing a bent wheel
PostPosted: Tue Feb 19, 2013 8:35 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18212
Location: Sunny Glasgow
Id suggest that even a complete novice could true their own wheel enough to get them home given they know the basic premise.

Spin the wheel and note where the wobble is.
Count 5 spokes with the worst of the wobble in the middle
Tighten 3 spoke spoke spoke spoke spoke to pull the wobble into the middle .Work on quarter turns.NO MORE you wont need to and bet do things a little at a time.

You can practice using a front wheel in a set of forks as thats the easiest way of holding one .You will need something to act like a baseline fixed point to judge your work against,something like a lolly stick taped to one blade.


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 Post subject: Re: Truing a bent wheel
PostPosted: Tue Feb 19, 2013 9:42 pm 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
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Joined: Mon Aug 31, 2009 12:26 am
Posts: 16165
Location: Rurally close.
Mrtennis wrote:
Haha ok this is interesting. I read to do either 2, 4 or 6 at a time etc. I think that's what the guy says in the video that I posted! In order to keep the tension equal on both sides, which makes sense to me. So why do you lot do 3 at a time?


The key point for 3 at a time is that you halve the amount of turn you do on one side into 2 spokes on the other side. So 1/4 turn on a single spoke and then 1/8 turns on the 2 adjacent spokes to counter balance the tension. Of course it will pull in a little on the single spoke to get it true but is then balanced by doing the opposite. You want to balance it to keep it relatively central.


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 Post subject: Re: Truing a bent wheel
PostPosted: Wed Feb 20, 2013 6:42 pm 
Dirt Disciple

Joined: Mon Jan 28, 2013 3:28 pm
Posts: 40
OK, so I gave it a go this afternoon at straightening me wheels.
The front wheel went really and is virtually perfect.
The back one however is harder and has brought up some problems. It was worse than the front to start with, with it bending one way and then the other in three or four places. So I started tweeking away. Got the worst of the bends out although not quite perfect. But I stopped there because I found I was adjusting various spokes, to get some tighter or loser in the direction they had to go, three or four have become really lose! I'm not certain whether the tension is meant to be the same on all spokes, but this handful of spokes really is very lose! I decided just to stop in the end and come and see what more info I can find online.
I rode the bike a bit on the rode and at first there where a couple of sounds from the spokes on the back wheel. Don't know if this is normal after adjustment because it settled down pretty quickly.
Anyway, help appreciated as usual!


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 Post subject: Re: Truing a bent wheel
PostPosted: Wed Feb 20, 2013 7:40 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 5650
Location: Aberdeen
you need to tighten up any "very" loose spokes, there shouldn't be any that are signifficantly looser than the others.
It can get a bit confusing sometimes as to which way loosens / tightens the spokes, but I try and start on one side of the wheel (eg the left) and attempt to reduce/remove any points on the rim that touch the brakepads... then I turn my attention to the other side. Eventually you'll get there.
You'll most likely hear a "pinging" sound when you first ride the wheels, that's just the spoke nipples seating themselves in the eyelets and twisting slightly. Really you should "stress relieve" the spokes after alterations, so Google that.

Sounds like you're almost there though :-)


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 Post subject: Re: Truing a bent wheel
PostPosted: Thu Feb 21, 2013 12:46 am 
Dirt Disciple

Joined: Mon Jan 28, 2013 3:28 pm
Posts: 40
jimo746 wrote:
you need to tighten up any "very" loose spokes, there shouldn't be any that are signifficantly looser than the others.
It can get a bit confusing sometimes as to which way loosens / tightens the spokes, but I try and start on one side of the wheel (eg the left) and attempt to reduce/remove any points on the rim that touch the brakepads... then I turn my attention to the other side. Eventually you'll get there.
You'll most likely hear a "pinging" sound when you first ride the wheels, that's just the spoke nipples seating themselves in the eyelets and twisting slightly. Really you should "stress relieve" the spokes after alterations, so Google that.

Sounds like you're almost there though :-)


Thanks for the advice.
I gave it a rest for a couple of hours then went back out to take another look. Turns out the wheel was actually extremely straight, i did a better job than I thought. But those lose spokes were still there, and I don't feel comfortable leaving them. And if I start tightening those I know the rim won't be true anymore. That's where I'm getting stuck and not sure what to do next


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 Post subject: Re: Truing a bent wheel
PostPosted: Thu Feb 21, 2013 12:58 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 5650
Location: Aberdeen
Ah... but as the wheel is now it's not really as strong as it should be, and will probably go out of true after a few uses anyway.
You can still tighten those loose spokes up, it shouldn't have much of an effect on the rim until you're approaching the same kind of tension that you have in the other spokes in the wheel.
If you find that when you've tensioned up those loose spokes it's made the wheel out of true again, well you know what to do :wink: but try loosening off the spokes on the opposite side of the rim to the ones which were very loose before (but you have now tightened up).
It's all about getting the balance right between left/right/up/down. It can be tricky, so make small adjustments and check again.


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