Does BFG not make a 305/70/17?
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BFG's for 17" Rim
I think you will only find the 17 rim available for the 265 and the 315 (H2 Hummer stock) along with the 37x12.5x17. I am expecting them to make something for the Dodge 17" 275 as another size.
http://www.bfgoodrichtires.com/asset...rain_ta_kd.pdf
http://www.bfgoodrichtires.com/asset...rain_ta_kd.pdf