Bear with me while I complain like a little girl whose shoes are too tight. I'm sick of answering the same "Why doesn't my speedometer register correctly since I swapped tire sizes?" question over and ...

Yes, but just a bit. A car measures the rotations of the axle and wheel. The speed is the distance traveled per hour (speedometer reading). The distance traveled (odometer reading) is rotations ...

For example, when a speedometer shows 75 mph, GPS often reports a speed closer to 71 mph. This difference is not a defect. It ...

Question: I’m having a problem with intermittent reading on the speedometer of my 2000 Nissan Frontier. Sometimes it reads correctly or jumps around to different readings, or gives me no reading.

•Many people have altered the speedometer readings unknowingly just because of a simple tyre upgrade. •Most car manufacturers have tyre recommendations on the pillars between the front and rear doors ...

Dear Tom and Ray: It occurred to me that as a car is driven and the tires wear down, each tire's circumference decreases. Since the speedometer measures speed through the revolutions of the drive ...

Knowing your driving speed is extremely important for long drives, a trip to the local market, or just a short weekend getaway. Vehicles have various safety features loaded into them, but one of the ...

When cruising along the highway, there is a large discrepancy (6 to 7 per cent) between the speedometer on my car and the readings given out by my GPS system. Which is more accurate? The art of the ...