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Old 10-03-2015, 11:25 AM   #1
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New Tires and Towing Adjustments

I put new tires on my TV, Same brand, size and weight rating, Goodyear Wrangler SR-A.

Before I put the new tires on I had towed my TT on a 1200 mile round trip and it towed great. After putting on the new tires, I towed it on a 200 mile round trip and it was terrible, it swayed and bounced and was a horrible towing experience. Both trips used 95S and other major roads and smaller local roads. So I don't think the roads themselves could have caused the problem. I checked and set the air pressure in all TV (60 front and 75 rear) and trailer tires (50 all around) prior to the trip and my TST TPMS said the pressures were good on the trailer and TPMS on the truck ssaid the pressures were good on the truck the whole trip.

The old tires were worn down to the tread ware indicators so they had about 2/32" of tread left on them, the new ones have 16/32" of tread depth, a difference of 14/32" or 7/16".

For the trip home I put more weight on the back of the truck by adjusting the tension on the spring bars and it didn't seem to help much. About 1/2 way home I stopped in a rest area and adjusted the tension again to put more weight on the truck and it helped some with the sway and and bounce but it seemed like I was getting blown around more by passing tractor trailers.

Anyway I have a hard time with a difference in height of 7/16" on the tires making such a big difference in the towing. Has anyone else experienced this? Any other dieas for what might have caused such a drastic change by just putting on new tires?

I didn't like the lack of tension on the spring bars on my WDH after the final adjustment so I've lowered the ball height on the hitch and when I go camping again in a couple weeks I'll see how it goes.
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Old 10-03-2015, 11:46 AM   #2
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My owners manual actually stated that until my tires had 1000 miles on them I might experience unusual characteristics. Whatever that means. Lol
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Old 10-03-2015, 11:46 AM   #3
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New rubber is always a little squirrely. I hate new tires on my semi at first. I bet they will settle down for you after a few more miles.
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Old 10-03-2015, 11:51 AM   #4
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Sorry need more info..... Are your Goodyear Wrangler SR-A "P or LTs". They apparently come in both depending ...... Also putting more weight on the truck would make the front end lighter and make handling worse??? Is the trailer sitting level???? Do you have sway bars with your weight distribution set up.
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Old 10-03-2015, 12:44 PM   #5
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I think its the tires needing to be worn a little. They cant make a perfect round tire and the road needs to wear on them awhile for the best ride. this is more common the more aggressive the tread is.
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Old 10-03-2015, 01:24 PM   #6
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Originally Posted by Oaklevel View Post
Sorry need more info..... Are your Goodyear Wrangler SR-A "P or LTs". They apparently come in both depending ...... Also putting more weight on the truck would make the front end lighter and make handling worse??? Is the trailer sitting level???? Do you have sway bars with your weight distribution set up.
The tires are LT265/60R20 121/118S (3267lbs load rating, 112mph speed rating). I would never put 60 & 75 lbs of air in a passenger car tire or put passenger car tires on a 3/4 ton pickup.

When I hook up I usually measure the truck before and after I hook up since the trailer can be loaded differently each time. When I hooked up for this trip the rear of the truck dropped about 1.25" and the front was the same as before the trailer was hooked up.

My friend who was following me home called me and told me the front of the trailer was high. That's when I stopped and reduced the tension on the spring bars again.

No sway bars needed with a BlueOx SwayPro WDH.
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Old 10-03-2015, 01:58 PM   #7
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I know for my truck RAM 1500 it came with the SR-A tires and I think they are terrible tires. If you look on tire rack they are $100 or more cheaper than other name brand tires in the same size. I think there is a reason they are so cheap.
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Old 10-03-2015, 02:14 PM   #8
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Smile Tires

LT tires are not recommended on TTs because there is too much flex in the sidewalls. Only ST tires should be used on TTs. I replaced my original 14" tires that had excessive wear after only 4000 miles of highway driving with 16 inch Maxxis ST radial 10 ply tires and the trailer pulls like a dream.
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Old 10-03-2015, 02:15 PM   #9
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Originally Posted by Happy Vibe View Post
I know for my truck RAM 1500 it came with the SR-A tires and I think they are terrible tires. If you look on tire rack they are $100 or more cheaper than other name brand tires in the same size. I think there is a reason they are so cheap.



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Old 10-03-2015, 02:35 PM   #10
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This is from experience and IMHO. When I tow anything with two axles you should be concerned that there is equal weight on each axle. In other words don't worry about whether or not the truck is level. Adjusting the weight dist. bars should only be done to level the trailer. If you are experiencing towing problems be certain the trailer is loaded properly and evenly. I have to agree about the new tires. Same thing happened to me. It got much better after the first 500 miles.
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