tires 13 vs 14 inches - Fiberglass RV


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Old 04-10-2013, 01:07 PM   #1
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Name: I.
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tires 13 vs 14 inches

Hi,
What are the pro and cons of changing 13 inches tires for 14 inches?
What dimention is needed ex; 185-65 14
or bigger?
thanks
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Old 04-10-2013, 01:11 PM   #2
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  1. Wheel well clearance.
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Old 04-10-2013, 01:12 PM   #3
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Quote:
Originally Posted by x2uol View Post
Hi,
What are the pro and cons of changing 13 inches tires for 14 inches?
What dimention is needed ex; 185-65 14
or bigger?
thanks
Tire Size Calculator - Discount Tire Direct
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Old 04-10-2013, 01:28 PM   #4
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Pro 14"
You can easily get a D rated truck tire in 14" but much harder to get in 13".
More load capacity available
Higher speed ratings
Better selection of what ever kind of tire you choose
Better availability in small towns when you blow your trailer tire.
Run cooler
More ground clearance (assuming a taller tire)
Probably wear better..

Cons of 14":
Have to buy new rims
Simply may not fit (more effort figuring out what will and won't fit)
Cost more
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Old 04-10-2013, 01:30 PM   #5
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On my Trillium I use ST205/75R14 tires on 14" Ford Ranger Rims. I like the look.
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Old 04-10-2013, 03:04 PM   #6
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Arlon says it all. Additional ground clearance is often times mentioned as a reason to go to the larger rim and tire. This is of very little consequence as a 1" on average increase in diameter translates to only a half inch additional ground to frame height. The increase in load rating is of much greater--and frequently crucial--significance for a case in which the trailer manufacturer has chosen a tire which has barely adequate load capacity for the curb weight of the trailer.

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Old 04-10-2013, 07:02 PM   #7
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Jack, I need new tires soon -- how do these look?

Loadstar ST185/80D13 Bias Trailer Tire with 13" White Wheel - 5 on 4-1/2 - Load Range D Kenda Tires and Wheels AM3S331

I'd get the new rims cuz I want something nice looking.

PS: I have a 2011 Scamp 16 Standard. The D load range on these allows a little over 3200 pounds trailer weight and I can't imagine exceeding that (but who knows).
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Old 04-10-2013, 08:20 PM   #8
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Sharon, 3450lb combined load capacity isn't a tremendous safety margin over your projected 3200 trailer weight but over is sure better than short of the total load. I've never had bias ply tires except on a utility trailer (f78-15 or equivalent new money) so I don't know enuf about the differences to comment. Odd that never stopped me in the past? Off to twist the cap off a Spoetzel Wild Hare.

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Old 04-10-2013, 08:52 PM   #9
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Sharon, I had those same Loadstar D rated tires on my 16. I've previously had good luck with Loadstars, but last year one of them developed a huge bubble on the inside. Didn't blow, but I had to take it off and put my spare on, which meant I was without a spare for the rest of the trip. Normally I would just stop somewhere and get another spare, but you will find that the chance of finding a 13" D rated tire in stock, especially on a weekend, is about nil.
I still have faith in Loadstars, but decided when we got home to buy a set of the 14" C rated Loadstar tires and put them on, since you can find those stocked in most stores if you need to replace one on short notice. The 14" C rated tires also have more capacity than the 13" D rated tires, which is good if you have the side dinette, since the sink side carries more than half of the load. If you have access to the Scamper forum you can see some photos of the upgrade.
http://tinyurl.com/ctw3hoq
I was prepared to do some trimming of the fiberglass but after adding the larger tires they fit with no problems. (The picture looks closer than it really is, and the tire pivots in an arc when traveling rather than straight up and down) That doesn't mean that they would work without trimming on yours, but I was lucky :-)

Good luck in whatever you choose.
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Old 04-10-2013, 08:57 PM   #10
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They look like bias-ply tires. If that's what you want, I suppose that's fine.
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Old 04-10-2013, 09:09 PM   #11
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Quote:
Originally Posted by SharonM View Post
I have a 2011 Scamp 16 Standard. The D load range on these allows a little over 3200 pounds trailer weight and I can't imagine exceeding that (but who knows).
Sharon, did you intend the 3200 pound value to be the capacity of the tires, or the weight of the Scamp? Jack has noticed that the combined maximum capacity is 3450 pounds and seems to be thinking that 3200 pounds is what you expect the Scamp to weigh:
Quote:
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Sharon, 3450lb combined load capacity isn't a tremendous safety margin over your projected 3200 trailer weight...
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Old 04-10-2013, 09:41 PM   #12
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Okay fellas, ty for the input. I shall spring for 14's -- etrailer has nice prices, and I just got back from H&R Block and my refund will cover 3 14 inchers. I hate having to buy a spare cuz of cash outlay, but I'd hate even more to be on the road (fulltiming) and get a flat with no spare. Now then... you smarties, which is the best 14" to get?

Radar, think I oughta think seriously about those C rated Loadsters you got? I would LOVE not to have to trim the fiberglass since I don't have a clue how to do that (yet). Heck, I still haven't gotten up the courage to use my lovely new rivet gun (grin). I have the side bath and front couch, don't know how that distributes weight differently from the side dinette.

Which reminds me... I want to buy 2 AGM batteries to stick under the couch all the way towards the tongue for my solar hookup when that day comes (or would one be enough do you all think). I won't have much loot at all for campgrounds so lots of boondocking in my future. At around 60 pounds per battery (yellow top Optimas, I might get) and dual propane tanks, will that kill my tongue weight? I could get a 25-pound single fiberglass tank if that would help. Anyway, lots to think about that's not tire related, but I have to deal with these blasted tires first.

Sharon
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Old 04-10-2013, 10:17 PM   #13
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Sharon, Here's what I got.
Karrier ST205/75R14 Radial Trailer Tire with 14" White Wheel - 5 on 4-1/2 - Load Range C Kenda Tires and Wheels AM32153

As for dual batteries under the front bunk, one may be enough if you don't have extended boondocking, two would be better if you have extended stays at boondock locations or do a lot of cold weather camping that would require the furnace fan to run a lot.
That would be a lot of weight, so check your tow vehicle recommendation for maximum tongue weight. My truck can handle a lot, but my Subaru is limited to a 200 lb tongue weight which takes some creative packing and would not be possible with dual tanks and dual batteries.
Your camper is better balanced than the side dinette models. The side dinettes end up with a lot of heavy items (fridge, water heater, awning, microwave, fresh water tank) on one side, so a 2400 lb side dinette camper might have 1400 lbs or more on one tire if water tanks are full.
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Old 04-10-2013, 10:29 PM   #14
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Sharon, I have been happy with the Goodyear Marathon ST205/75R14s on our Burro. It appears you won't have clearance problems in the wheel well as other Scamp owners have encountered none with this tire and a 14"wheel. I don't care for the idea of hacking away fiberglass.

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