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Can 4.80-12 Tire Replace ST145/R12 Load Range E Tire  

Updated 11/17/2025 | Published 12/22/2024

Question:

Im trying to find a spare tire and wheel combo for a Triton Jet Ski Trailer that has ST145/R12E tires. Can I run a 4.80x12 such as AM30670?

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Expert Reply:

Hi Andrew; in terms of size it is close but the 4.80-12 is going to be shorter and and narrower. It also has a significantly lower capacity compared to a 145/12 load range E tire. I would stick with the same size and get the # KE46EV as a replacement. This also a load range of E with a max load of 1,520 lbs at 80 psi.

expert reply by:
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Robin H
Robin H. profile picture

Robin H.

11/17/2025

Hey Andrew, how did the Karrier S-Trail tire and wheel work out on your Triton Jet Ski Trailer? It sounds like a solid match for the load range you needed. Your update could make it easier for others choosing a spare for a similar setup.

Andrew profile picture

Andrew

11/17/2025

@RobinH, Haven't had to use it yet as it is a spare tire/wheel combo.

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