Bedlam wrote:
The extra weight of heavier rated tires is not bearing down on axle or frame, so that is really not an issue. You may need to upgrade shocks and check your brakes due to the additional unsuspended weight and rolling forces.
The tire capacity is that load as measured where the tire is in contact with the road. That includes the weight of the tire. A tire with a capacity, say, of 3200 pounds can carry 3200 pounds where the tire meets the scale. Not subtracting the weight of the tire, it's included. So, a tire rated at 3200 pounds and weighs 100 pounds can carry another 3100 pounds onto the scale with it to total 3200 pounds.
Is that wrong?