The Kumho Radial 857 185, 195 and 205R14's are load range D and "Trailer Service" rated. I don't know the difference between that and ST.
http://www.tirerack.com/tires/tires....el=Radial+857&
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2006 TM2720 w/Lift and 15" Maxxis 225 75R15 E Tires
2004 GMC Sierra 4X4 w/Prodigy
2014 Durango 3.6L AWD w/Equal-i-zer Hitch & Prodigy
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