Trailer wheels worth upsizing?

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I just learned that I might be wrong about the hub thing, given that this hub uses centering lug nuts. From what I am hearing, the hole can be bigger, assuming it's not a hub centered wheel/hub.
 
My 14ft Starcraft SF14 is on a trailer that originally had 5.30x8" tires, which were effectively the same OD as a 4.80x12 tire. It was fine weight wise and height wise but I got tired of replacing the tires every two or three years due to dryrot. About 10 years ago I put new bunks on the trailer, and at the same time, I flipped the axle to the top of the springs, replaced all the hardware and changed over to 13" radial tires. The boat gained about 3/8" of height on the trailer initially but I re-adjusted the center rollers and bunks and got it down to the lowest possible position and now its an inch lower than it used to be.
What I like most about the 13" tires is that they last longer. Since my boat is light, I can run any small radial tire if needed, so that opens up a whole slew of options. Right now I've got a pair of Tracker branded 165 80R13 tires that came on a neighbors new boat two years ago. The diameter is close enough to the 12" wheels on my other trailer that I can carry a 12" for a spare if I had to. I do have a matching spare though.

I downsized the tires on my 16ft boat's trailer, which had 205/14 tires on it so it could use the same size tires and only need one spare in the truck. Since that trailer is rated for far more than my boat there's no issues with the smaller tires and it helped the loading angle and depth a bit too.
On both, the taller tires mean I never need to sink my axle or hubs in the water when launching or loading either boat.
 
Tires with a larger diameter will wear less in a given distance than their smaller counterpart. More wear material, and less revolutions to go the distance.

Same concept with wheel bearings. Less RPM, less wear, less heat.

That said you are only talking about a 10% difference, give or take between a 12" and 13" tire. The trailer would be recycled into a new Hyundai before you ever got your money back out of that upgrade.

"The trailer would be recycled into a new Hyundai before you ever got your money back out of that upgrade."

Love it. This gets my vote for quote of the week!
 
I just learned that I might be wrong about the hub thing, given that this hub uses centering lug nuts. From what I am hearing, the hole can be bigger, assuming it's not a hub centered wheel/hub.

There are several different 5 lug bolt patterns so you would just need to make sure you get the correct wheels for your hubs. 5 on 4.5", 5 on 4.75" and 5 on 5" I think are the options.
 
I have an Alweld 1542 boat on a painted steel boat trailer. It has a Minn Kota foot control motor and a 15HP Mercury outboard. Add in some accessories, but generally it's a relatively light boat (compared to a bass boat). The trailer has basically new 12 inch wheels like you get from Walmart (5 bolt). The fenders have lots of room, and I COULD upgrade to 13 inch wheels. The chst would be about $500 for two wheels and a spare.

My trips are generally less than an hour each way, maybe 1.5 hours max. Road speeds up to say 65 here in Texas.

Is it worth upgrading to 13 inch wheels given this set of conditions? Like I said, the 12s I have are basically new.
I just did this, three 13" wheels & tires, new for just over $200.
 
I made the upgrade from 12 inch bias to 13 inch radials. I have not tried it out yet but it fit perfectly and I think it was a good upgrade. Attached are the originals and the new wheels and tires.
 

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Looks a little tight to me to be honest. Better take it easy on the bumps. Not so sure the extra space isn't by design to ensure the tires don't bottom out in the fenders.
 

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