[jsb5717]

Ours came with Rainier F Tires. The rating might have been OK for the weight of our trailer but the Rainiers are a brand known for many failures.

What brand are your tires? That is the bigger issue. Rainier, Tire King, Castle Rock, and several other off-brand names, are not brands I would have a lot of confidence in. Many do just fine with the OEM tires but many do not. Damage from a blow out is very expensive and without a quality tire the odds are against you. Within the first year I changed ours to Sailun G tires. Sailun or Carlisle tires would be a good choice. Upgrade to the G's for your own peace of mind...it's cheap insurance.