OK I am a little confused about this. I looked up on tirerack and 1010tires.com and they both say for a 93 explorer 4wd. Stock is 225/70/15 and an optional 235/75/15. Just wondering what does it mean optional and what models come with the 235/75/15? Also i looked at tires.com and they wouldn't even list tires for Explorer it says the sizing chart is complicated to list so call them to find out what specs you need. Those two sizes are a pretty big difference is diameter so why would there be two big different sizes available??????? Can someone clear this up for me? I know there are smart people out ther unlike me at the moment.

;)

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