LT is DOT code for a truck tire, not a trailer tire. My primary objective regardless of LT vs ST would be E vs G load and documented tire reliability if available. Our first two montanas came OEM with LT truck tires, and have run LT tires like many others for years without issues. LT or ST, if G load you should be good.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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