Originally Posted by Rob M

The data Johnny Bravo was providing were from customer surveys (similar to what you would find at Tirerack here in the U.S.) Even though TyreTest.com uses the word "test", their surveys aren't really tests as there are no criterion or standard. But just like Tirerack's surveys they are useful in comparing tires amongst a category.

The distance of 5,209,560 km was the total distance driven on the Goodyear's reported by all the respondents. Likewise, 993,023 km was the total distance driven by all the respondents with the Bridgestone tires. All it means is that there have been several times more people filling out surveys for the Goodyear tire than for the Bridgestone. Most likely, the Goodyear tire is a better seller or it has been around longer, either which would explain the greater number of completed surveys. One other thing about these surveys: even though they are quite useful, many of the responses are completed when the tires are still new or at least well before they are worn out. Issues like ride noise, ride comfort, hydroplaning, etc., often arise as a tire wears and may not be accurately reflected in the surveys.