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At the National Rally Keystone stated that they 2017 modification that the RIAA made to their requirements makes the requirement for tires to be 10% over axle rating. That forced Montana to go exclusively to Sailun 627 G tires rated at 4400lb. This also eliminated the Goodyear G614 option as it didn't meet the RIAA spec on 7000lb axles.
At least that's what Mark Krolh said.
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Jim & Martha Abernathy
2014 Montana 3402RL Level UP, Sailun S637's, TST 507, 500W solar
2014 Ram 3500 Laramie® 4x2 diesel dually crew-cab 3.73 axle, Reese R20
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