Got a 2011 dblcab prerunner with stock steelies 15x7. If I buy new rims and tires, do I have to get the TPMS pulled out from the stock tires, then put in? I wouldn't want to buy new ones, but I am just understanding how they work. They go inside the tire and is attached to the valve stem right? To pull them out of the stockies seem like a lot of extra work.