What is acceptable runout? I've seen wheels on ebay saying .3mm, .25mm, etc runout. I understand what runout is but at what point do you start having balancing problems? Anyone running a wheel they know has runout? How much? Any problems? Thanks...

 

Wheel Run-out A balanced wheel can still be a major source of vibration if run-out is present. A rim that is poorly made, is not perfectly round or has been bent will result in run-out. Likewise, a tire that is improperly mounted or has tread irregularities. Such as flat spots due to skidding or hard spots from faulty manufacture can cause vibration. Run-out is a significant problem. Barely visible run-out of a few hundredths of an inch, such as wobble when the wheel is spinning or a rim that is not precisely round, will cause more vibration then a weight imbalance of several ounces. Wheels should always be viewed carefully during the balancing procedure check for run-out. If a new tire appears to have a large imbalance check for run-out. In fact, balancing a wheel with large run-out may actually worsen the vibration.


taken from http://www.accuturn.com/newpage/wblearn.htm . Says that runout can be a very bad thing. I would think even worse on two wheels.