this might have been already asked but I couldn't find anything on it.

I was stupid enough not to get alignment after I got s techs, and now two of my tires have barely any tread left. I'd like to get all 4 tires replaced, but I'm really low on money right now so I can only get two.

Is it ok to just replace two tires? if so how would u figure the psi? just go with the recommended psi the tire comes with?

 

It's ok to replace just one tire. People do it all the time - not everyone is made of money, and some don't even have enough for a new tire... but just a used tire.

The PSI will never change due to the number of new tires vs. old tires. You should always use approx the recommended PSI for each individual tire.

 

just drive carefully

 

Yeah. Though it's ok to do, you might want to drive a little more careful than usual. Mixing and matching tires could make you lose a little traction. If you go with the same tire as the rest (just a newer one obviously), you might be ok. But I would still recommend to drive carefully.

 

The most important thing in such a scenario is to keep them on the same "axle", either both on the front or both on the rear, not mixed side to side. You'll be fine, no worries.

 

ok thanks guys, your info is much appreciated.

also though i am assuming i should get the same size (215/45)????

 

Yes, get the same size.

Why would you switch one of them (or even two unless you just want bigger tires like a hot rod) with a different size?