Hi All, Is it worthwhile to exchange 8" trailer tires to a 12"? I was given a trailer with decent 8" tires (the tread looked decent), but was wondering if I should spend the extra $80 on 2 12" tires. I'm only driving between 1-3 hr. each way to the dirt at 60-65 mph. I know I should be going 55 but.... Will the 8" tires be able to handle the speed? Also, where do I find out about speed ratings on trailer tires? Thanks for your thoughts.