Switching to Smaller Trailer Tires on Robalo Boat Trailer for Better Garage Clearance
Updated 07/20/2024 | Published 04/14/2018
Question:
I have a Robalo 180 boat trailer single axle with brakes on it. The tire size is 205/75 R15 tire size. I’m looking to lower the trailer a couple of inches to get into a garage. Will a 145/R12 E rating wheel fit on the trailer with breaks and be used for local transport ??? It will save me about 3 inches. Thank you.
asked by: David S
Expert Reply:
The overall diameter of an inflated ST205/75R15 trailer tire is just over 27-inches. The size ST145/80-12 has an overall inflated diameter of just over 21-inches. Switching between the two would give you a height drop of half this difference, about 3-inches as you noted.
An E-rated tire in size ST145/80-12 will offer a weight capacity of 1520-lbs, such as Kenda # AM31215, which mates this tire size with a 5-on-4-1/2 bolt pattern aluminum wheel. As long as your hubs have this same bolt pattern you can make the swap. Just be sure that your loaded trailer weight is within the combined capacity of two of these wheel/tire items, which is 2 x 1520-lbs or 3040-lbs.
Product Page this Question was Asked From
Westlake ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 5 on 4-1/2 - Load Range D
- Trailer Tires and Wheels
- Tire with Wheel
- Radial Tire
- Load Range D
- 205/75-15
- 15 Inch
- L - 75 mph
- 5 on 4-1/2 Inch
- Steel Wheels - Powder Coat
- Westlake
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Rob
7/20/2024
I have a 1996 18 foot robalo center console I need tires for my trailer. What size should I get? I do a lot of highway traveling 75 mile an hour normal speed thanks.