There's a not-so-old song with a lyric that goes something like, "The tires are the things on the car that make contact with the road ..." While it makes for a catchy little chorus, it's not an ...

7. Use the magnifier to measure the width (W) of ten grooves whose edges have been marked by the tool. This may be done by lining up the long vertical zero line on the magnifier scale along the left ...