Wheel truing

[mr_cellophane]

When does a wheel become so buckled that it is impossible to true ?

I have got rid of small "wear and tear" warps, but got pulled out on yesterday and I'm not sure whether to straighten or replace.

Thanks

 

[Citius]

If it's buckled due to an impact, then send it straight to the bin.

 

[mr_cellophane]

OK - Don't look like I can get the same sort, so it will have to be a pair on her insurance. How sad

 

[lpretro1]

If you take all the tension off the spokes and the wheel is still out of shape then it is not worth messing with

 

[Smokin Joe]

OK - Don't look like I can get the same sort, so it will have to be a pair on her insurance. How sad

If it was the drivers fault then it's deffo new wheel time. Carbon rim on a Hope hub, wasn't it?

 

[Yellow Saddle]

If it was the drivers fault then it's deffo new wheel time. Carbon rim on a Hope hub, wasn't it?

...with Sapim Laser spokes. And when the insurance pays out, sell the carbon rim and get two or three alu ones instead.*







*My tongue is firmly in my cheek in case some killjoy comes and questions my morality and tells me that I've now revealed the real me.

 

[John Shingler]

My Cycling bud went into the back of me when I stopped at a junction. Fell onto my back wheel resulting in one very banana'd wheel (to the extent it fouled on the chain-stay as it went round).

Bin it? (the wheel I mean)

 

[Yellow Saddle]

The answer isn't as easy as that. You'll have to take off all the tension from all the spokes and see fi the rim's default state is straight. A wheel can taco (pretzel, collapse, etc) without permanent damage to the rim.

 

[John Shingler]

Currently have about an inch of runout i'd guess. So If I slacken off all the spokes (how much do I slacken? never messed with wheels) then re assess. How much runout is acceptable with the spokes slackened?

 

[Yellow Saddle]

Currently have about an inch of runout i'd guess. So If I slacken off all the spokes (how much do I slacken? never messed with wheels) then re assess. How much runout is acceptable with the spokes slackened?

Until the spokes have no tension. Recovering from this state is not really to be attempted by the first-timer relying on the bike for tomorrow's trip to work.

The acceptable run-out on a non-tensioined rim should be zero, measured with an error of about 1mm, I guess.