Replacement Wheel and Tire Recommendation for Size F78-14 with Galvanized Wheel

Updated 04/23/2020 | Published 02/28/2018

Question:

My old rims and tires are f78-14 on a 2000 lb. Boat trailer. Can you help me find the correct new rim and tire size? Prefer the galvanized rims.

asked by: Dean C

Expert Reply:

The modern size equivalent for the tire size F78-14 is the size 205/75-14. So for this size on a galvanized wheel Taskmaster Mod Wheel and Tire part # AM3S450. What's great about the Taskmaster tires is that they are rated for higher speeds at 81 mph whereas most are only rated for 65.

The tire has a ply rating of 6 and a 1,760-lb max load at 50 psi as well.

expert reply by: Jameson C

Jeff R.

4/21/2020

My 3000lb boat has 30 year old F78-14 tires. Can I replace them with 12 or 13 tires and wheels to make the boat lower to the water?

Chris R.

4/23/2020

As long as you're still able to maintain sufficient weight capacity, there's no particular reason you couldn't move to a smaller tire/wheel to lower your ground clearance. I'm not sure how much you're looking to drop the trailer, but going to an ST175/80R13 tire/wheel like the Kenda # AM31994 will lower it by a little over an inch. It features a load capacity of 1,610 pounds at 65 psi.

Helpful Links

dept-pg-trailer_tires_and_wheels-pc-12_inch.aspx

dept-pg-trailer_tires_and_wheels-pc-13_inch.aspx