Replacement Tires for 155SR12 Tires
Updated 06/27/2026 | Published 06/23/2026
Question:
I have trailer tires that read 155sr12 and need to be replaced
asked by: Alexander B
Expert Reply:
Hey Alexander! The closest trailer tire equivalent we have to that size is ST145/R12 like the Kenda Karrier S-Trail # AM10140. These are 5.7" wide with an outer diameter of 21.3" and will fit the same 12" wheels you have now. These are Load Range E with a max load of 1,520 lbs and a speed rating of M for 81 mph.
What kind of trailer do you have?
(click to enlarge)
Jeffrey S.
6/27/2026
ST145/R12 like the Kenda Karrier S-Trail # AM10140. this tire has out-performed so far. i have owned the set for a couple years and they have been amazing. i travel about 50 miles to fish the inner-coast for red fish and snook. the speed limit is 70-MPH and the tire that came with my trailer was only raited for 65MPH so i needed to upgrade to a tire thats rated higher than that. the Kenda Karrier st145/12 is rated for 81MPH. Robin steered me to this tire and i am grateful for his choice. etrailer is no joke, if you expect excellent service from any vendor you do business with than they are by far the ones. God Bless ETRAILER and their service reps.
Curtis
6/27/2026
These tires are a great upgrade, use them on a pop-up camper. Similar speed rating, almost double the load rating compared to the "standard" trailer tires. No longer replacing bulging tires every 3000 +/- miles, sink in to soft ground less, and gas milage improved about 5% when towing. Plus, was able to have balanced (wasn't even offered with the originals), reducing vibration @ highway speeds. Very satisfied.
Product Page this Question was Asked From
Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range E
- 145/80-12
- 12 Inch
- M - 81 mph
- Kenda
more information >
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Alexander B.
6/26/2026
I have a small home made trailer with a bare bones 11ft Jon boat on it. Whats the shipping cost for 3 of those tires to san diego? Do you sell small cargo boxes for trailers?