Ever make a beautiful 10-foot putt on a level green only to notice the ball curve away from the hole at the last second? If you thought there must be something wrong with your equipment-you were more correct than you knew. Believe it or not, a perfectly round golf ball has never been manufactured.

Just like automobile tires appear to be perfectly round-yet they still need to be spin balanced before being driven at high speeds. The same holds true for golf balls. The inherent lopsidedness of every ball works against you off the tee and on the green.