Quote:
Originally Posted by kit352
Im also not sure i can play with tire pressures to much. The car came with new snow tires and im not sure how much presure they can take. they are very soft too. Im sure i have a few mpg hiding in a tire change but thats alot of coin i dont want to spend on it.
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There's no need to worry about the tire failing from the reasonable kind of overinflation we discuss here. I advise against exceeding the tire's maximum inflation rating (liability, handling, and wear), but it is always
safe to go far beyond it. (What is unsafe is going too far below what a load-inflation chart says you need, which is generally what you'll find marked on your car.) Of course there are issues of excessive center wear (a moderate amount is fine; look up why motorcycle tires don't really need much tread to channel water and you'll understand; see also tires with a solid centerline tread) and bad handling (which you figure out immediately after trying a new pressure), but you can detect those and back it off a bit.
As for spending money: Do you intend to keep the car for enough miles to wear out your current set and another set of tires? If so, invest in the other tires now, and invest in some wheels from a
junkyard or craigslist. Winter tires wear out fast in the summer, so on that principle alone, switching them out when winter is over will save enough money to pay for the wheels. Additionally, winter tires too worn to use in winter still have plenty of tread to use in summer, so with two sets of wheels it's easy to keep two sets of winter tires and discard the most worn set when it's time to buy new tires for snow season.