Wheel truing!
- Thread starter rivers
- Start date
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Big John
Guru
If you have a spoke key (the right size for the spoke nipple you have) and the internet then providing it really is a simple truing job you'll find a thousand sources of useful information. The trouble is when a wheel goes out of true it's usually for a reason, a broken spoke for example. If you've whacked the wheel, and you know it, then it may not be a simple truing job. I've been given wheels to work on that I've been told just 'need a bit of truing' only to find it's been wrapped round a tree or run over by a truck. Contrary to popular belief wheel builders can't perform miracles, more's the pity.
FrankCrank
Old layabout
Said it a few times on this forum now, wheel building/truing is not a black art that only a few enlightened sorts can even entertain.
More folk should at least have a try - I'm sure most will be surprised how easy it is, and a real sense of achievement
More folk should at least have a try - I'm sure most will be surprised how easy it is, and a real sense of achievement
dan_bo
How much does it cost to Oldham?
Remember that spokes can't tighten themselves, only loosen.
Bristolian
Well-Known Member
- Location
- Bristol, UK
Ooh, flashback time
I used to work for a company that made vibration tables and one of our exhibition party tricks was to have several of our smaller shakers loaded with circuit boards, plastic propeller blades, etc., and a section of bicycle rim with three spokes attached. As we ran the shakers through the frequency range from 0 - 1000Hz & 1 - 10g you could watch screws loosening and tightening, the prop blade flexing and the spokes of the wheel tightening and loosening.
Happy days
Ian H
Ancient randonneur
Ooh, flashback time
I used to work for a company that made vibration tables and one of our exhibition party tricks was to have several of our smaller shakers loaded with circuit boards, plastic propeller blades, etc., and a section of bicycle rim with three spokes attached. As we ran the shakers through the frequency range from 0 - 1000Hz & 1 - 10g you could watch screws loosening and tightening, the prop blade flexing and the spokes of the wheel tightening and loosening.
Happy days
That is the tension increasing and decreasing, not the nipples turning on the spokes.
presta
Guru
Ooh, flashback time
I used to work for a company that made vibration tables and one of our exhibition party tricks was to have several of our smaller shakers loaded with circuit boards, plastic propeller blades, etc., and a section of bicycle rim with three spokes attached. As we ran the shakers through the frequency range from 0 - 1000Hz & 1 - 10g you could watch screws loosening and tightening, the prop blade flexing and the spokes of the wheel tightening and loosening.
Happy days
It's informative for anyone to watch something under vibration with a strobe light and see objects they thought were rigid flexing like lumps of jelly. Anyone unfamiliar with resonance won't appreciate that the acceleration at resonance can be a lot higher than the excitation acceleration.
Shock & bump test is completely the reverse though, a 20g test that sounds as if it's going to be horrendous is about as trivial as it gets, and looks it when you actually see it. People can be rather surprised to hear that tapping a pencil on the desk is around 1000g.
