What tire size - Fiberglass RV


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Old 12-20-2012, 07:48 PM   #1
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What tire size

I've searched to no avail. So I thought I'd throw it up on here. What is the factory tire size on a 1997 16' spirit casita. The wheels are 13" but what tire size should I put on. The ones on there currently look small. Thanks in advance
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Old 12-20-2012, 08:33 PM   #2
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There is a lot of info on tire sizes on both of the Casita forums but if I were you I would move up to 14" tires and rims. That way you can get a Load Range D rated tire and have some added security while towing. I went with the Kumho 857's, 205 R14 Load Range D tires and have been very happy with them but there are also other good brands to choose from.
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Old 12-20-2012, 08:46 PM   #3
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Do u think your 14" wheel/tire combo would fit on my trailer it has the welded on 10 degree up axel

And I did search the casita forum. It is much harder for me to navigate on my phone and I could not find an answer to this q
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Old 12-21-2012, 09:29 AM   #4
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Quote:
Originally Posted by Randy Hagen View Post
There is a lot of info on tire sizes on both of the Casita forums but if I were you I would move up to 14" tires and rims. That way you can get a Load Range D rated tire and have some added security while towing. I went with the Kumho 857's, 205 R14 Load Range D tires and have been very happy with them but there are also other good brands to choose from.
I run a 185/80 D-13 "HI RUN" (brand name) that is a D rated tire, and is quite a large looking tire.
Dave & Paula
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Old 12-21-2012, 09:34 AM   #5
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Check out etrailer. They let you sort by rim size, load range, etc in their search function. It probably came with a 175 width and you can bump that to 185.

Free shipping next couple of hours.

13 Inch Load Range D Tires and Wheels | etrailer.com
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Old 12-21-2012, 11:30 AM   #6
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I run a 185/80 D-13 "HI RUN" (brand name) that is a D rated tire, and is quite a large looking tire.
Dave & Paula
It may well be that your's is a "D" rated tire ... but, to avoid confusion, I just want to point out that the "D" in the size lettering above indicates "bias ply", not load rating.
Load rating is indicated elsewhere on the tire in plain language.
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Old 12-21-2012, 06:09 PM   #7
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Do u think your 14" wheel/tire combo would fit on my trailer it has the welded on 10 degree up axel

And I did search the casita forum. It is much harder for me to navigate on my phone and I could not find an answer to this q
I also have the welded on 10 degree axle on my 17'- I'm sure they will fit without any problem. I'm thinking about purchasing the lift kit that they sell on Amazon for Casita's so those of us without the highlift axle can fit 15" tires under them!
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Old 12-21-2012, 09:06 PM   #8
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Thanks for all the advice. I would go with the lift and 15 but too much work since my axels are welded on instead of bolt on. I think I will go with the larger 13s.

I've heard that c load range is adequate for my size camper yet many people run d. Is this for stronger sidewall. Less chance of blowout?
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Old 12-21-2012, 10:37 PM   #9
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Andyman, I run a D range tire for peace of mind while towing a single axle trailer. I never have had a flat on any of my trailers when using this philosophy combined with changing out the tires every 5 years.
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Old 12-22-2012, 08:47 AM   #10
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C load rating is 'adequate' but IMHO D load rated tires are better- I prefer to err on the side of safety!
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Old 01-19-2013, 03:00 PM   #11
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I bought some 175/80/13. And was not happy with the ground clearance. So I emailed casita and they told me I could go as large as an st205/75/15 I believe and now am v happy with clearance.
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Old 01-19-2013, 07:36 PM   #12
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It's good to know that a 15" tire will fit under the Casita with a standard axle- let us know if you have any problems with the tires rubbing or any other problems while towing.....
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Old 01-19-2013, 07:41 PM   #13
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I just love that picture of Andy's family in the window.
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Old 01-19-2013, 08:17 PM   #14
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Thanks. And I'll let u all know how it goes
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Old 04-13-2013, 08:27 PM   #15
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Old 04-13-2013, 08:55 PM   #16
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Great pictures! Looks like everyone is having a good time
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Old 04-13-2013, 09:25 PM   #17
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Whatever the standard size of tires of the vehicle rolling out of assembly line from automobile/heavy truck manufacturers, that is the best. As my understanding, this size is optimum case for car/truck performance and being thru all kinds of test/adjustments before coming into production. Here is one of my own experience... For years, I owned a little Honda Civic with standard 13inch wheel. My everyday work involved driving back and forth, round trip as closely 200kilometer per day, all season, year around. One day, i decided to change the tire size to 15inches with bigger, sporty alloy rims. Surely it looked very sporty and tough...That didn't last long. One day of snow storm which I experienced for years, I ended up with.....the car slid off the HW, wrapped around a hydro pole. It was lucky I survived without hurt but the car was crap. Just share my story...
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Old 04-14-2013, 12:09 AM   #18
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Originally Posted by Thinh View Post
Whatever the standard size of tires of the vehicle rolling out of assembly line from automobile/heavy truck manufacturers, that is the best. As my understanding, this size is optimum case for car/truck performance and being thru all kinds of test/adjustments before coming into production...
If it were that simple, every vehicle would be available with one and only one size of tire; in fact, almost every model comes with various choices as part of packages or just as separate options. The "right" tire is the best compromise for a particular person's requirements, considering factors such as traction, handling response, rolling resistance, wear, dry versus wet traction, high temperature resistance, cold weather performance, damage resistance...

In the case of trailers, the compromise is usually heavily biased toward cost, so the trailer often comes with the smallest common trailer tire which has adequate load capacity.
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Old 04-14-2013, 12:17 AM   #19
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If it were that simple, every vehicle would be available with one and only one size of tire; in fact, almost every model comes with various choices as part of packages or just as separate options. The "right" tire is the best compromise for a particular person's requirements, considering factors such as traction, handling response, rolling resistance, wear, dry versus wet traction, high temperature resistance, cold weather performance, damage resistance...

In the case of trailers, the compromise is usually heavily biased toward cost, so the trailer often comes with the smallest common trailer tire which has adequate load capacity.
Agreed. I think tread design plays more of a part than surface area, although it's also an important factor. I had a pickup that was good on ice, put much bigger tires on it to play on rocks, and it was scary on ice. I had those tires siped, and it was better than factory...

My other pickup I went from 245/75/17 duelers that were like driving on greased cookie sheets (35k miles on them, and NO wear, I made the tire shop drill the sidewalls as I watched, as I felt they weren't safe to run on a vehicle, I had it go sideways 3x on the road in rain), to wider 265/70/17 dura-grapplers, and had 10x the traction on ice.

My trailer tire preference is to put the largest and heaviest rated one that will fit on. I'm not saying it's right for all trailers, as it may make the ride noticeably worse, but it's the right choice for me.
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Old 04-14-2013, 12:50 AM   #20
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Quote:
Originally Posted by Thinh View Post
Here is one of my own experience... For years, I owned a little Honda Civic with standard 13inch wheel. My everyday work involved driving back and forth, round trip as closely 200kilometer per day, all season, year around. One day, i decided to change the tire size to 15inches with bigger, sporty alloy rims. Surely it looked very sporty and tough...That didn't last long. One day of snow storm which I experienced for years, I ended up with.....the car slid off the HW, wrapped around a hydro pole.
In this case, Randy, you chose a tire which may have been right for best dry pavement performance, and found that you actually valued all-weather traction, so you had the wrong tire for you. For me, 195/50R15 was right for our race-prepared Honda CRX, 185/60R14 was right for our street CRX and stock Civic sedan... and all three came stock with 13" wheels and tires and we used 13" tires in the winter (a CRX is a Civic coupe).

Same for trailers - match your priorities.
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