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Old 08-06-2013, 08:08 AM   #29
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White covers look better on white S.O.B.s than Airstreams (when the covers are new and clean).


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Old 08-06-2013, 10:00 AM   #30
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Originally Posted by wolf146 View Post
I did read that and I wondered what tests you did to get those temperature differences ie. time of day, did you measure both tire temps at the same time while one tire was under a white cover and one under a black cover length of time measured etc Just wondering. The numbers seemed extreme. wolf146
Was in early afternoon. Full sun in my backyard near Akron, OH. All temps except the one of the tire with the cover off were recorded in less than 5 min time frame. As I said in post after taking temp of the tire just after removing the cover I waited about 30 min and then got the high temp.

Numbers are real. I do not sell covers, do not work for and never worked for a cover manufacturer or company that sells covers.

The later post where I used a black plastic bag over a tire to simulate a black cover I waited about 1/2 hour with the bag over the cover. Got temp of the bag then removed the bag and got temp of the tire.

Since you and others seem to have some concern about the test, I plan on doing a time temp test in a week or so (I misplaced my IR temp gauge so have to find that first)

I have no budget to go out and buy a set of black covers as I would have no use for them and wouldn't even give them to someone else to use, so I will be using a sheet of black plastic to simulate a black cover.

I have noted on a trip on US 30 which is East/West road I could see a temp difference of over 10F using my internal air chamber mounted TPMS of sun side vs no sun side on the RV even when driving.

Driving temps are more complex due to air movement and heat transfer rates due to higher temperature differentials.

Hope this helps clear things up.

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Old 08-06-2013, 12:29 PM   #31
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Tireman9, Thanks for the info. Good to know that you actually performed some measurements. Often posts are made with comments like " I think" or "I believe", so I wanted to make sure that this is real data. These are higher temperature ranges than I would have expected - you taught me something! Thanks, wolf146
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Old 08-17-2013, 03:50 PM   #32
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Originally Posted by RLS View Post
Had white ones that really got grungy. Decided to go the cheap route, 1/2" Styrofoam 3 yrs. using and still looks new. I cut it so it fits under the wheel well, glued some ends on and put a small angle on the inside end pieces so they go on easy.
I like RLS's solution and was wondering if gluing some of that reflective bubble wrap insulation to the boards would help.

I just had Michelins installed with internal tpms and stopped at the trailer today. The tires on the side in the sun were 20 degrees warmer (98-100) than the tires in the shade (79-80).

That and the idea they'll be soaking in all those "rays" makes me want covers quick. Has anyone used that reflective insulation for tire covers?

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Old 08-18-2013, 07:03 AM   #33
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Insulation used as a cover might hold the heat in longer at the end of the day. The white covers I found at Camping World have some this coating on the inside but they are basically functioning as an umbrella.
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Old 08-18-2013, 09:43 AM   #34
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For keeping the heat down, just about anything is better than black covers which would not only heat the tires but actually keep the heat in the tire longer after the sun went down.

I wouldn't be too concerned about insulating the tire. The basic covers I use and seen in my test have some white "cotton fluf" on the tire side that is a bit like very thin (1/4") fiberglass insulation but this stuff has worn off in a number of places.
As you can see in the test the white cover is about as cool as the side of the RV and only a few degrees hotter than ambient air in the shade. Remember the back side of the tire is in full shade so the heat is leaving the tire on that side.

I would think it more important to have a cover that is easy to use so you actually use it every day, rather than some fancy set-up that becomes a burden to put up so some days you don't bother.

I am also not impressed by the "kool" looking black mesh flat covers. These will let some UV through and the black mesh will heat up and radiate heat to the tire. While they might look good they are like much of the "bling" I see on many RVs. Extra cost and extra weight but no added functionality.

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