Can anyone help me out trying to understand how tires & wheels work? I'm confused about the specifications. Specifically, what kind of tire can I put on a specific sized rim? For example, my 2003 Jeep Liberty Sport, 6 cyl 3.7 L has 2 certain sizes which are recommended I guess. They are: 225/75-16 235/70-16. I can't figure out if this is just a recommendation, or a strict specification, as in, this is the only size that will work. Can I put any 16 inch tire on any 16 inch rim? Specifically, I have available to me: 215/70 R16. So, how do you tell if you can put a certain sized tire on a certain sized wheel/rim? I've heard that the first # means the vertical length of the tire from the outside when you're looking @ it, and the second # means the length of rubber on the tire that is running on the road, or vice versa. I've heard also that the #'s are a proportion of the two dimensions. I can't find enough on line to explain it.
Also, what about rims/wheels? You can find online of course which size is recommended for your vehicle, but, of course, people put all kinds of different stuff on there. Is there any way to know if a 17 inch rim would work? I had to opportunity to buy new 15 inch rims/wheels w/tires mounted to them already. I spent like 4 days looking around online to see if they would fit my jeep. Some people said 'no', some said 'yes'. In the end they said the only thing I can do is try one on and see if it rubs on the caliper, which it did. So, I couldn't get them. I desperately need tires, and I was trying to get the rims at the same time, but since I don't know how the system works, I don't know which products to pursue and which to forget about. My next step is to call a tire store like Bridgestone and asking for a crash course education on how all this works... But, in the meantime, if someone here would help me understand how this works, that would be great. I hope to hear from you