What Size Trailer Tires Will Replace B78-13 Trailer Tires
Question:
I have a trailer with a 16ft. boat that have been sitting in my carport for the winter and the tires are both flat. They were kind of cracked from sun damage before but this was the last straw I guess. They have been sitting on the rims well at least one of them for about 6 months. Do I need to get tires with rims or without rims? What are my tire options? Thanks,
asked by: Krista
Expert Reply:
I was able to zoom in on the picture you submitted to see that the tire size you have is B78-13ST. A trailer tire size 175/80-13 will replace a B78-13 trailer tire. You would not need a new rim, just tires.
A 175/80-13 is going to have 3 load ratings: B at 1,100 pounds at 35 psi part # AM1ST74, C at 1,360 pounds at 50 psi # AM10199, and D at 1,610 pounds at 65 psi # AM10210. This size will have a diameter of 24.1 inches. This tire size will fit on a 4-1/2, 5, or 5-1/2 inch wide wheel like what you should have.
If you choose tires rated higher than your axle, you still have to go by the axle weight capacity. If you choose tires rated lower than the axle capacity, then you need to go by the tire capacity. I have included some links to tire FAQ articles for you.
Products Referenced in This Question
Karrier ST175/80R13 Radial Trailer Tire - Load Range C
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range C
- 175/80-13
- 13 Inch
- M - 81 mph
- Kenda
more information >
Karrier ST175/80R13 Radial Trailer Tire - Load Range D
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range D
- 175/80-13
- 13 Inch
- M - 81 mph
- Kenda
more information >
Loadstar ST175/80D13 Bias Trailer Tire - Load Range B
- Trailer Tires and Wheels
- Tire Only
- Bias Ply Tire
- Load Range B
- 175/80-13
- 13 Inch
- Kenda
more information >
Product Page this Question was Asked From
Karrier ST175/80R13 Radial Trailer Tire with 13" White Wheel - 5 on 4-1/2 - Load Range C
- Trailer Tires and Wheels
- Tire with Wheel
- Radial Tire
- Load Range C
- 175/80-13
- 13 Inch
- M - 81 mph
- 5 on 4-1/2 Inch
- Steel Wheels - Powder Coat
- Kenda
more information >
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