Those infamous blue dots are for the manufacturer's use. There is no harm in removing them.ciaka said:So what is the summary of this thread?
Does everyone agree that the blue dots on the rims mark the heavy spot of each rim?
Would really appreciate final answer since I did notice the dots on mine too and was going to scrape them off, but now looks like they have a function. Thanks.
The dots are to assist with balancing the tire, but I'm sure the tire could also be balanced with the dots not lined up. It would just take more weights.bjh said:WELL, after reading this, I am concerned. I have 4 blue dots, or had..One mostly all came off within the first week, but you can still tell where it was. But I looked and 3 of the 4 do line up with red dots, but one is on there with seemingly NO relationship to the red mark. I just bought this car 3 weeks ago. Should I be worried something is wrong with this tire?
Aside from being inflated for carrying loads, tires need to be round to work properly. Wheels also need to be round. However, due to manufacturing constraints, neither may be, exactly. So, wheel manufacturers tend to place the valve core hole (or some other mark) painted DOTS at the lowest point of the wheel. Tire manufacturers, on the other hand, tend to place a mark, usually a red dot, on the wheel's highest pint. The hope is if you put the higest point of the tire on the lowest point of the wheel, they will cancel out and you'll end up with a round wheel/tire combo.
Hope this helps..
BINGO! However what i was told at nissan school was that the blue dots didn't technically represent the heaviest spot in the rim, it represents the lowest spot in the rim so that you can match the tire's red dot (tire's highest point) to it. This will minimize radial force runout. Its not NEEDED but it helps in reducing radial runout vibration.The dots are to assist with balancing the tire, but I'm sure the tire could also be balanced with the dots not lined up. It would just take more weights.