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Old 10-20-2018, 07:31 PM   #1
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Increase Wheel Size on trailer?

I need to replace the tires on my Coachmen Clipper. It appears that trailer tires mostly come already mounted on rims, so if I have to replace the rims too I'm wondering if I should increase the wheel size from the current 13 inch to 14 inch.



Assuming they will fit in the wheel wells, what are the advantages/disadvantages of increasing the size from 13 to 14? I'm aware that the larger wheel will not change the load capacity (which is limited by other factors such as the axle, but I am thinking that the larger radius will decrease the rotational speed and thus reduce chances of an overheat related failure.



The tires installed by the factory are ST185/80R13 with load range D, a possible replacement being https://www.etrailer.com/Boat-Traile...ACXSJ101G.html. I'm considering ST205/75R14, also load range D, such as https://www.etrailer.com/Tires-and-W...74-000014.html
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Old 10-20-2018, 08:50 PM   #2
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Just have to watch what the axle weight rating is. Some of the smaller wheel spindles can't handle the added rotational loading of a larger wheel/tire. Had that with a axle that was rated for 1500 lbs. I had 14 inch wheels on it and an accident bent it. When I got the new axle, that's when I needed a minimum 3500 axle for 14 inch wheels. I did go from 14 inch wheels to 15 inch radicals on my car trailer. That was to get higher grade tires.
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Old 10-21-2018, 03:11 PM   #3
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If you're going to change from 13 to 14" wheels, that's the time to go from D to E-rated, regardless of your load, and if you can find an E. Simply put, an E-rated tire, properly aired to the load, will give you an extra margin of reliability and adds little to the cost of new tires.
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Old 10-21-2018, 03:49 PM   #4
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Assuming a tandem axle check the inter-tire distance. The 14" rim tires in question are 1.5" larger in diameter than the 13" and will consequently close the distance between the two tires by that amount. Usually plenty of space but check.

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Old 10-21-2018, 04:09 PM   #5
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Quote:
Originally Posted by jamoody View Post
I need to replace the tires on my Coachmen Clipper. It appears that trailer tires mostly come already mounted on rims, so if I have to replace the rims too I'm wondering if I should increase the wheel size from the current 13 inch to 14 inch.



Assuming they will fit in the wheel wells, what are the advantages/disadvantages of increasing the size from 13 to 14? I'm aware that the larger wheel will not change the load capacity (which is limited by other factors such as the axle, but I am thinking that the larger radius will decrease the rotational speed and thus reduce chances of an overheat related failure.



The tires installed by the factory are ST185/80R13 with load range D, a possible replacement being https://www.etrailer.com/Boat-Traile...ACXSJ101G.html. I'm considering ST205/75R14, also load range D, such as https://www.etrailer.com/Tires-and-W...74-000014.html


What is the axle rating on your trailers certification label?

According to your OE tire and wheel specs shown above for the 13" tires the axle should about 3200#.

The wheel specs from the 13" reference above would not qualify for an axle with more than 3300# GAWR.
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Old 10-21-2018, 04:57 PM   #6
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Increase Wheel Size on trailer?

You can get Carlisles in that size in a load range d (careful, that also come in c) to put on your existing rims. I did that rather than risk issues. My mechanic was very impressed by their quality compared to the cheap tires he took off my Clipper.
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Old 10-22-2018, 02:04 PM   #7
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Why not go to bigger wheels. The trailer manufacturer put original wheels on for a reason. So sure you probably know more about the trailer than the people who designed it. Swap em out for bigger. Everyone knows bigger is always better.
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Old 10-22-2018, 04:03 PM   #8
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Why not go to bigger wheels. The trailer manufacturer put original wheels on for a reason. So sure you probably know more about the trailer than the people who designed it. Swap em out for bigger. Everyone knows bigger is always better.
With that thinking, why would you want to go from biasply to radial or a C to a D? The manufacturer knows better! Sorry!
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Old 10-22-2018, 04:12 PM   #9
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Originally Posted by jtesta1 View Post
Why not go to bigger wheels. The trailer manufacturer put original wheels on for a reason. So sure you probably know more about the trailer than the people who designed it. Swap em out for bigger. Everyone knows bigger is always better.
Larger wheels and tires do not do anything bad if you donít use that as an excuse to overload the axle/trailer. If the load remains under rated specifications for trailer nothing is harmed. Provided thet otherwise fit
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Old 10-22-2018, 05:39 PM   #10
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Check the width also to sure that the tire doesn’t rub on the frame or something else underneath.
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