Tire #1:

- ST205/75R15D
- Load Range:
**D**108/103M **Radial**- Max load: 2200 lbs/Single
- 15x5J Steel rim. 5 x4.5" Directional. Rated 2150 lbs
- Tire weight : 46 lbs

- ST205/75D15
- Load range:
**C**101/97L **Steel belted**- Max load: 1820 lbs/Single
- 15x5J Steel rim. 5x4.5" MOD. Rated 2160 lbs
- Tire weight 38 lbs

Both tires and rims are reputable but different companies with good reviews ...

I was moving them in the garage and felt like one was heavier. That's why i decided to weigh them.

The radial tire weighs 8 lbs more (46 vs. 38 lbs). Rims have different kind of holes (Directional vs. MOD/ Round). I am assuming the rims can't be that much different since they have almost the same rating (2150 vs. 2160 lbs) or are the radial tire in general that much heavier than steel belted tires? The radial tire/rim weighs %21 more.

Q1:

Extra 8 lbs!

Kind of curious since this is %21 more. if it was %5-10 more, I would not be asking this question.

Q2:

This is a bigger concern.

When I had the empty trailer on jack and spinning the lighter tire (Steel belted) by hand, I didn't hear any noise. However when I had the radial tire and spinning, I could hear a short scraping sound at every turn but it turned smoothly and didn't seem to be slowing down at the turn. Also the Tire is exact same size as steel belted tire and was not catching anything.

The trailer is practically new and in great condition. It doesn't have brakes.

do you think the additional 8 lbs is causing extra load on the bearings since the tires are off the ground? Not sure how else to explain this.

I swapped tires on both sides and same result as far the scraping sound. no sound with the lighter tires!