Solution for Needing Replacement Trailer Tire for 155/80-13
Updated 12/08/2025 | Published 11/24/2025
Question:
I recently acquired a 1970 Hobie Cat. The trailer tires 1 axle, 155/80D13 are about 55 years old. Wheels are 5-lug 4.5?. I can’t find direct replacements for these tires. What do you recommend? Do ST155/80R13’s exist? Should I replace the entire wheel set? I have minimal fender clearance, and minimal ground clearance, so I’d like to not change the size much either direction. Any help is welcome!
asked by: Eric A
Expert Reply:
Hey Eric, the closest tire size to the ST155/80R13 you have is the ST175/80-13.
I did some calculations on the tire sizes and found that the difference between the 175/80R13 and the 155/80R13 is pretty small.
The 175/80 is 24 inches inches tall whereas the 155/80 is 22.7 inches tall for a difference of 1.3 inches total, but that difference needs to be split since the overall diameter is split since the wheel rotates on the axle. So basically the wheel will take up an additional .65 inches of your fender well.
The width difference is pretty small at .78 inches. So basically 3/4 of an inch wider
For a tire you would want the part # TTWTRTM1758013C made by Taskmaster as it is a radial tire with a higher 81 mph speed rating. Most trailer tires are only rated for 65 mph.
Product Page this Question was Asked From
Provider 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
- Taskmaster
more information >
Continue Researching
- Q&A: Recommended Replacement for B78-13ST Trailer Tires On Boat Trailer
- Q&A: What is Largest Trailer Tire Size that Has 4 on 4 inch Bolt Pattern
- Q&A: What Cost Effective Option do You Have to Raise the Front of My RV to Level it?
- Q&A: High Speed Rating Trailer Tire Recommendation ST175/80R13
- Q&A: What is the Speed Rating for Loadstar ST175/80D13 Bias Trailer Tire and Wheel Combo # AM3S030
- Article: Aluminum, Galvanized, or Painted: Which is Best for Your Boat Trailer?
- Q&A: What is Difference Between Kenda Karrier Tires AM102210 and part number KE78KV
- Article: Trailer Tire Sizing
- Q&A: Can 13 Inch Trailer Tires and Wheels be Used in Place of 4.80-12 Tires and Wheels
- Article: How to Measure for Travel Trailer and Fifth Wheel Steps
- Article: 7 Common Questions Everyone Has About Trailer Tires
- Article: Boat Trailer Guides: Which are the Best?
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Article: How to Measure Your Trailer Wheel Bolt Pattern
Jameson C.
12/8/2025
Hey Eric, how did the ST175/80R13 tires work out on your Hobie Cat trailer? Did the small change in height and width still give you enough fender and ground clearance? Your update could make it easier for others with older trailers to choose the right size.