Ok so this is my first car, I've had it for 2.5 years and I badly need to replace the tires. I've done some research and it seems that the stock tires were P235/75R15. The tires on the vehicle are P245/65R16.

Does the slight change in size make that much of a difference?

On another note, I'm looking into buying Wrangler Silent Armors for the replacement set and they don't make said tires in the current size, rather P245/75R16. I'm not a gearhead so would this require me to get different rims?

Thanks for the help.

*If this is similar to another post I apologize, I searched the forums for topics dealing with 94 blazers, and the threads I saw were about upsizing to 31" tires, nothing about simple replacements.*