Join Date: Dec 2019
Location: USA Indianapolis
i understand the TPsystem is based on the antilock system so it does not care what actual sizes the tyres might be in an absolute sense, it does not measure the actual tyre sizes it is looking at the reletive rotation speeds of the tyres to each other.
so you could put 4 different size wheels on, tell the TPsystem they are correct,and it will tell you when one of those mismatched tyres has lost enough air pressure to make it spin faster than the others according to how you set the group of 4.
i just had a set of 195/55-16 put on and the TPM light is on.
im going in for my 2019s 7 month this afternoon and the dealer should check pressures and reset the TPM, I shall report.
Last edited by honegod; 12-17-2019 at 02:20 PM.
Reason: more context