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Considerations For Upgrading A Carry-On Utility Trailer To 15" Tires For Long Highway Trips  

Question:

Im interested in upgrading my Carry-On 4x6T 2K utility trailer tires with the 15inch Kenda radials on etrailer so it can keep up with my vehicle on multi-day long highway trips. Any considerations around axle or bearings or hub etc? Besides dealing with the fender space, it seems like a simple swap and I can drive 80mph all day.

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Expert Reply:

Hey Matt, it certainly may be possible to upgrade the tires on your utility trailer. Space limitations are the main thing to consider though. Our rule is that you want at least 3" between the tire and the wheel well/fender, and you want at least 1" between the inside of the tire and the frame of the trailer.

Aside from that we would want to make sure the hub bolt pattern is also a 5 on 4-1/2". We would also want to make sure the hubs you are using are made to support a 15" wheel. I am not sure what size tires you are using currently and knowing that would help me get into a bit more detail. Generally, any hub that will support a 13" wheel can also support a 15" wheel. So provided you have room in the fender area, and your hubs are compatible with the 15" wheel and 5 on 4-1/2" bolt pattern you can upgrade to the # AM32424 with no problem. This tire has an 81-mph speed rating, so it is definitely suited for long highway trips.

expert reply by:
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Jesse M

Matt

2/28/2024

Thanks Jesse! Yeah its a 5-4.5 hub and I'm currently running 175/80/D13s with about 2" of frame clearance. The 13's have a 3" hub cutout. So i think these will probably work as long as there's enough frame clearance. I'll have to cut off the fenders and attach some new ones.

Etrailer Expert

Jesse M.

2/28/2024

@Matt Ok great, so that means your hub will be fine for supporting a 15" wheel. The ST175/80R13 tires are about 24.1" in diameter and 7" wide. The ST205/75R15 tires are about 27.3" in diameter and 8.1" wide. So yea with 2" of frame clearance currently, you'll be good. just make sure fender clearance is adequate. My may have a replacement fender for you if you are in need.

Matt

2/28/2024

@JesseM Yeah i was poking around for fenders too. I'd love a rec
Etrailer Expert

Jesse M.

2/29/2024

@Matt What style fender is on there now? we can try to match it. Do you want plastic, aluminum or steel? We have quite a fer options that will fit with a 15" tire/wheel combo. The link below will show you our full selection of fenders in this size. I suggest taking a look at the Aluminum Jeep Style Fender # CE18041ATB or for a steel fender # HP66VR. These will work nicely with the tires we discussed, but there are a lot of options and different sizes available.

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