What Size Trailer Tire Replaces an L78-15 Tire on a Boat Trailer
Updated 06/08/2015 | Published 06/06/2015 >
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Question:
My trailer tire is a L78-15 b load range. what tire can I replace it with.
asked by: Steve W
Expert Reply:
A 78-15 is an older tire size and the metric equivalent is going to be either a 205/75-15 or a 225/75-15 depending on the capacity you need to match the old tires.
A 205/75-15, load range C, # TTWTRTM2057515C, is rated for 1,80 pounds at 50 psi, and a load range D, # AM10245 is rated for 2,150 pounds at 65 psi.
By comparison a 225/75-15 load range C, # AM10251, is rated for 2,150 pounds at 50 psi. A load range D, # TTWTRTM2257515D, is rated for 2,540 pounds at 65 psi. And a load range E, # AM10303, is rated for 2,830 pounds at 80 psi.
The 205/75-15 tires will fit wheels that are 5 to 6-1/2 inches wide (inside where the tire sits, not overall width).
The 225/75-15 tires will fit wheels that are 6 to 7 inches wide (inside where the tire sits, not overall width). I have included some helpful links on trailer tires for you.

Product Page this Question was Asked From
Karrier ST205/75R15 Radial Trailer Tire with 15" White Wheel - 5 on 5 - Load Range C
- Trailer Tires and Wheels
- Tire with Wheel
- Radial Tire
- Load Range C
- 205/75-15
- 15 Inch
- M - 81 mph
- 5 on 5 Inch
- Steel Wheels - Powder Coat
- Kenda
more information >
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