Forum Discussion
SJ-Chris
Dec 29, 2021Explorer II
I'm a big fan of putting on Commercial (C) rated tires on my 30' Class C RVs. The 121 load rating provides for an extra 500lbs per tire to provide for a MUCH better weight buffer compared to the LT 115 rated tires (2000lbs more on the rear axle). I'm surprised how little the weight buffer is on a 14500lb RV on the rear axle with what the factory recommends (115 rated tires).
Having the 121s on the rear also helps a LOT in the event that your tire pressure isn't up where it should be (close to 80psi).
Safety first!
Chris
Having the 121s on the rear also helps a LOT in the event that your tire pressure isn't up where it should be (close to 80psi).
Safety first!
Chris
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