Wire-poked wheels can be a headache. During normal use the spokes tend to loosen slightly, causing the wheel to deform. In an extreme case, a loose spoke will snap like a twig at the first pothole, which generally causes the other spokes to quickly self-destruct. On the other hand, overtightening them is just as bad. Not only can you yank the wheel out of true, but overly tight spokes are even more prone to snapping. There is a fine line between an under-tensioned spoke and one that is too tight.