All this data is a RECOMMENDATION. It's generalized information. Tires are subject to driving habits, tire pressures and balance. If you drive more highway than city, you can wait longer to rotate. If you drive more city, you'll find you need to do it more frequently. Do you see that I'm avoiding time or miles. It's all based on your use, pressures, and driving habits.
Me personally, currently run 50 PSI in all 4 tires. I drive mostly city (70%-30%) and don't brake late or turn too fast.
My schedule is set at 5K miles for now. I do all my own work, so it's easy for me to look at my tires and make decisions on what they need. Most owners neglect the balance aspect of tires and just rotate them. They don't worry about tire pressures and run whatever the shop sets them at. Most don't even check them. If they do are they set properly ? Is it according to
your driving habits and tire requirements, or just some random number they use ?
Don't let some shop make these choices for you. It's something you need to control so you can get an idea of what needs to be done and when. Most shops don't see the same car all the time, so it's hard for them to give proper tire advise. Most drivers get the standard RECOMMENDATION and tire pressure settings.
Only to find out to late, this isn't working and the tires are wearing bad or have now become scalped/cupped and need replacement.
Proper pressures, rotation and balance are all part of tire care. Leave one out and you'll find tire problems, but probably to late to save an otherwise good tire. Get a plan set and stick with it. Check the tire pressure at least once a month. For the 225/50/17's, 50 PSI is working perfect for my car and driving habits.
Here's my tires @ 3500 miles.
Edited by drdiesel1, 29 September 2013 - 02:49 PM.