Anyone else had this problem???? Tires

[She Devil]

My 2007 Versa has 225/40 18 tires with 40% tread, just switched from 20%. I had problems with air pressure in the old tires. Running Nitrogen!!! The pressure light came on several times. The old tires were dry rotted. So put new tires on and thought issues were handled. But guess what, the pressure light is on AGAIN. SO, has anyone else experienced problems with loosing pressure in low pros running Nitrogen? Any ideas on what the problem may be?

[AG]

Check the pressure, so you'll find out if its a tire problem, or TPMS problem.

[She Devil]

Did have a tire problem with the old tires!!! Kept loosing pressure in the front passenger tire. I shouldn't have pressure fluctuation issues due to temperature change with the Nitrogen.

[morgan]

Check for a leak arround the valve stem and valve core with soapy water. Tire shops are not always perfect (or the dealer). Your TPMS sensor could be missing the little rubber "O" ring or the valve core might not be tight. Just somewhere to start. Also all gas reacts to temperature at least a little.

[She Devil]

Ok great, will definately start there.

Here is another question>>> Anyone found a drum to disc conversion for the rear brakes?