How Fast For 12 Inch Tires
I have a small utility trailer that I just purchased. It has 4.80 x 12 tires. How fast can these wheels actually go with out burning up the bearings? I don’t need the “legal limit stuff” guys. Real i...
Forum Discussion
CapriRacer wrote:
First, 4.80-12 tires are restricted to 65 mph.
Second, 4.80-12 tires come in different load ranges: Load Range B - 785# at 60 psi, and LR C - 990# at 90 psi.
I'm going to guess the OP has LR B - and if that is so, then towing with 1500# is really marginal on load carrying capacity.
Also, there is a less than well known provision in the tire load tables that if you want to boost the max speed of trailer tires from 65 mph to 75 mph, add 10 psi. If you want to get to 85nph, also reduce the max load by 10%.
So the OP's original question? Like others, I would be more concerned about the tires than the bearings.
Agreed!. I am learning that the bearings won't be the issue. I can handle that with good synthetic grease and Timkins, however the tires will melt going 1500 miles one way with stops of course, then return trip. I think I will switch to passenger tires. The trailer is small, and the loads small as well, but the speed can safely be increased being a passenger tire. The load per tire will be rated around 900lbs which then will make it 1800 lbs. That trailer would never hold that weight so I am safe.
