I went to my local 4 wheel part store and the sales person said the biggest tire I could put on my truck was a 33X12.50 /17 or a 285/70/17. However, at www.4wheelsparts.com, their checkout page has a Pro Comp tire that reads these measurements "33/12.50R17 (305/70R17 )." What equals what?

33X12.50/17 = 285/70/17

or

33X12.50/17 = 305/70/17?

Thanks in advance guys! This website RULE!

For the curious, a sacbutt is a trombone.

 

What type and yr is your truck ( 2wd or 4x4)?A 295/70/17 will be the closes to the 33" I have the nitto grappler tires and i love them. Here is a pic of my truck. I installed a 2.5 leveling kit on the front.


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I have a 2006 Reg. Cab f-150. (4X2) I am pricing around to add a 2.5 lev. kit some time soon.

Oh by the way, SWEET TRUCK!

Thanks!

 

Actually a 285/70-17 is a 33x11.50-17
a 295/70-17 is a 34x12.00-17
a 305/70-17 is a 34x12.50-17

 

acctually the 295,70/17 is a 33.2" tire
the 305/70/17 is a 33.8"

 

Tire manufacturers round tire sizes up to the next whole number.