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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > 12 inch wheels/tires

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Lynnmor

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Posted: 09/04/19 06:30am Link  |  Quote  |  Print  |  Notify Moderator

mikere wrote:


I did some measuring today of clearances around the current tires and it looks like the outer wheel well is the limiting factor with about an inch to spare with the current tires. About two inches to the inner wheel well and about an two inches of clearance above the tire. Not much to work with. I'm trying to figure out if p175R80/15" will work, but I think they might reduce the critical gap to about 0.2", which isn't much.


Don't see where you allowed for suspension movement.





mikere

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Posted: 09/04/19 07:19am Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:


Don't see where you allowed for suspension movement.


The 0.2" is between the sidewall of the tire and the outside of the wheel well - not much lateral movement in any kind of suspension unless something's broken. But still, not really enough room in any case was my point.

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Posted: 09/05/19 09:31am Link  |  Quote  |  Print  |  Notify Moderator

If it were mine I would do whatever it takes to up the size to a 14" or 15". On a trailer that light, I'd be happy with a P metric radial. If going 14" though, a possible choice in a LT is Hankook RA18.

With that choice, I could pull any speed, and the tires would easily last out for 7 to 10 years, even if the trailer were to run upwards toward 100K miles.

mikere

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Posted: 09/06/19 11:15am Link  |  Quote  |  Print  |  Notify Moderator

Here's a fun fact. I just looked around for narrower 14" tires and came across a p155/55R14. It's listed diameter is 21", which is LESS than 5.30-12, which is 21.9".

https://simpletire.com/federal-p155-55r14-a55i4afa-tires

https://www.etrailer.com/question-77837.html

At least as far as the bearings are concerned, there's not any reason to change.

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