Red99TA

iTrader: (11)

I noticed that my truck has 265/75-16's and I don't know what the stock tire size was. The sticker from our door is ripped off so I can't see the tire info. I looked on tirerack.com and it says they're supposed to be 265/70-16's or 245/75-16's. I found a tire calculator online that shows these OE tires to be 30.5" On HPTuners I clicked on the speedo tab and it's showing my stock tune to have a 29.77" tire w/ 3.73 gears?? Is the tire calculator I found wrong or did someone input the wrong tire size into my PCM? Either way I need to update it b/c the tire calculator shows 31.6" for my current 265/75-16's. Any ideas?
TIA