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Old 10-27-2014, 01:33 PM   #1
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Smile Suspension And Tires???

Suspension and tires???????

If you want to know how much reserve you have on your GAWR compared on the decal of your particular unit?
Crawl under your unit and look at the stamped rating on the axles. While you are there also write down the SN# of the axles for further references.
If you take the decal ratings of a 198RD GVWR of 5900 lbs it says 3000 lbs axle rating times 2 + 6000 lbs. The actual axle stamped rating is 3500 lbs times 2 = 7000 lbs. So there is a 1000 lbs reserve. The 198RD has Dexter Axles and springs.

Next we going to look at the wheels which are Dexter Wheels white rims the sticker is still on it so it was easy to verify with their website brochure. #17-143 max rating 1820lbs and max air pressure 80 psi
4 wheels @ 1820 = 7280 lbs. Lots of reserve here

The tires what are on the TT are the Standard value (TKS48) Power King Towmax Radial ST 205/75R15 (C-6 ply) weight rated at 1820 lbs (dual axle) and 50 psi air pressure that is 1820 lbs times 4 = 7280 lbs.
So lots of reserve for the 198RD
There is a ST 205/75D15 (D-8 ply) rated tire from the same company also in the same category at 2150 lbs/65 psi (TKS49) or go to the upgraded quality MAX48 or MAX49

On the average with a properly loaded TT, 12% will be carried by the Tong Weight
For a 5er it will be approx. 20% on the disc.

The tires are the weakest link on the TTs and depend on so many factors and conditions.
ST tires are rated at a max of 65 mph and on many of my travels I have seen TTs going 70 to 75 mph. No wonder they blow their tires. Heat built up destroys tires very quick. Sure there are cases where the tire is at fault but most of the time it is the operator who runs with the tires are at fault.

To travel safe with your RV;
Keep the tire running within the tires rated speed limit; Keep the tires within their weight rating (do not go over the GVWR); Keep the tires filled with the rated cold air pressure; Watch the road condition; And check the condition of the tires regularly. Also the current outside temperature is a factor for heat build up.

Every one has their own tire preference and yes there are good quality and low quality tires, but most tires are made in China. Many North America mfg. tires have flaws on side wall too. It all boils down how much we want to spend on tires. The TT mfgs use in general the cheapest tire available. Be honest to your self when you experience a tire failure. Recommended is to replace ST Tires every 5 years. This is special true for trailer tires as RVs are stored in loaded condition.

So RV owners happy travelling and verify your own ratings reserve and watch the tire rated speed.
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Old 10-27-2014, 04:22 PM   #2
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by chance you no what the axle rating in on a 28 BHBE ?
The reason why I ask is it has a 9200 gvwr so I would think it would have 5000 lb axle's.
I'm looking at getting one soon

thank's mike
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Old 10-27-2014, 04:48 PM   #3
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Mike, this information you might be able to acquire from Jayco. When you getting the unit or before you buy go underneath and get the info of the Axle's. Some units are very close to the max. rating. I only kept specification over the units I have owned.
When you get the info of your axle's it is easy to job for parts when in need.
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Old 10-27-2014, 06:42 PM   #4
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Thank you , it look's like I will have to order one but I will find out by next week
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Old 10-27-2014, 07:02 PM   #5
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Question. I have a 351 RSTS with a gvwr of 15,500. Axles are 7000 lb axles. How do I get a 15500 lb gvwr when the axle total is 14,000?
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Old 10-27-2014, 07:40 PM   #6
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Deduct the TW for TT's is empty 10% for 5er is 20%
Check your tires for weight rating and do the math and deduct the 10 or 20% you will know of you are close to the max.
Remember tires are the weakest link.
Either way you will be under your 14,000 lbs axle's
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Old 10-27-2014, 08:06 PM   #7
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Got it. That would put my total axle weight around 12k. Well under the max.
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Old 10-27-2014, 08:26 PM   #8
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Well I know when I was at the factory the rep told me they put the axle and tire right at what the gvwr for the trailer is so people don't overload it .... But to push the limit with the tire weight rating is sort of scary to me .... Room to spare on weight of axles and tires makes me feel a little better ... Just my 2 cents .... I think I will be going with load range e when I replace mine on my 338 rets
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Old 10-27-2014, 08:54 PM   #9
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Originally Posted by Paintinfool3 View Post
Well I know when I was at the factory the rep told me they put the axle and tire right at what the gvwr for the trailer is so people don't overload it .... But to push the limit with the tire weight rating is sort of scary to me .... Room to spare on weight of axles and tires makes me feel a little better ... Just my 2 cents .... I think I will be going with load range e when I replace mine on my 338 rets
I put Maxxis E on mine within one month of ownership. I view OEM tires as shipping method.
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Old 10-28-2014, 08:06 AM   #10
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Yeah I have read the maxxis are the way to go and I think load range E on these heavy things will roll a little better also
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