Trailer Tire Recommendation to Replace a F78-15
Question:
exist. tires are F78-15 4 ply tires. I need new tires. what would be a comparable replacement tire? Is load range c ok?
asked by: Bob N
Expert Reply:
The modern tire size equivalent to your F78-15 is the size ST205/75-15 like the part # AM10245. This is a Load Range D tire with the capacity of 2,150 lbs at 65 psi.
For a Load Range C in this size you would want the part # AM10244 instead. This tire has a capacity of 1,820 lbs at 50 psi. As long as you go with a tire that has enough weight capacity for your trailer when loaded it doesn't matter which Load Range you go with.
You should note that trailer tires should always be inflated to their max psi rating in order for them to have their full capacity.

Products Referenced in This Question
Karrier ST205/75R15 Radial Trailer Tire - Load Range C
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range C
- 205/75-15
- 15 Inch
- M - 81 mph
- Kenda
more information >
Karrier ST205/75R15 Radial Trailer Tire - Load Range D
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range D
- 205/75-15
- 15 Inch
- M - 81 mph
- Kenda
more information >
Product Page this Question was Asked From
Loadstar ST175/80D13 Bias Trailer Tire - Load Range D
- Trailer Tires and Wheels
- Tire Only
- Bias Ply Tire
- Load Range D
- 175/80-13
- 13 Inch
- M - 81 mph
- Kenda
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Karrier ST205/75R15 Radial Trailer Tire - Load Range D
- Shop: Trailer Wiring
- Shop: Karrier ST205/75R15 Radial Trailer Tire with 15" Silver Mod Wheel - 5 on 4-3/4 - Load Range C
- Q&A: How To Install 7-way Connector In 2008 Ram 1500 With Factory 4-way Connector
- Q&A: Modern Tire Size Equivalent for Replacing F78-15ST
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Video: Finding the Right Trailer Wiring Harness
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Article: Trailer Wiring Diagrams
- Search Results: trailer wiring
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Article: How to Measure for Trailer Hitch Drop
- Video: Measuring To Choose The Right Trailer Axle
- Shop: Brake Controller
- Search Results: trailer tires and wheels
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Search Results: trailer hitch ball mount
- Shop: RV Bearing
- Video: How to Choose a Trailer Brake Controller
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Q&A: What is the Difference Between Load Range C and D ST175/80D13 Trailer Tires
- Shop: Gooseneck Hitch