Poor handling with new Hankook 19.5's - anyone else?

How are the shock absorbers?
If this is GM chassis, how much air is in the front air bags?
How is the steering stabilizer?

rivering and worn out tires at 33,000 miles, way too early. I suspect your problem is not the tires. A real good 4 corner weight, tires adjusted properly and most important I feel your real problem is you need a good laser alignment.
I bet you have some toe out, or other related problems.

We have six new Hanook tires on our 2005 GeorgieBoy Pursuit. The
handling compared to the original Goodyears is 100% better. We
also just put four new Hankook's on our toad. Will never buy
anything else!

spotrot

I brought them home & corrected the tire pressure right away so I only drove with them about 6 miles with the 100# pressure (mostly in city traffic) and didn't really notice any difference other than a little rougher ride.

Dave

Here is the link to look up your tire plant codes to see exactly where your tires were manufactured. Tire plant codes

it is doubtful, but not completely unheard of, where a tire manufacturer in China left off some of the gum strips specified by the engineer. Basically this was a change that was made to the tire AFTER it got USA Federal approval. here is the article. Chinese tire problem
I am not saying this happened on the tires that you have but the fact that USUALLY new tires ride and handle much better than old hardened used tires that your experience is somewhat strange.

Yes, the Hankooks were the exactly same size as the OEM Goodyears, 245/70R19.5, and they are on the duelies.
The rim width was fine for this tire and I've weighed the RV, front and back.

One possible issue is that these were made in China, date code Feb 2013. If Hankook switched the factory that made this size tire, perhaps the new ones have problems older ones did not.



Your Itasca probably weighs close to my Itasca 30B with the motorcycle on a rack on the back, so I'll try the lower pressure. I check the tires often with an IR thermometer (between the treads) so I'll know if heat build up is an issue.

Dave, did you notice if it felt bad at 100 psi?

Thanks to all for the feedback. I'd hate to drive another 40k miles with it feeling squirmy like it does now.

John

I replaced my 31’ Itasca’s Michelin tires with Hankook “245/70R19.5” 3,500 miles ago. The tire company put over 100 lbs. in all 6 tires. I reduce the pressure to the 70 lbs that Michelin’s weight/tire pressure guidelines recommend and I had used for over 40,000 miles with good results. The Hankook so far is handling about the same the Michelins did.

I did check with Hankook and they advised me to use the same pressure Michelin recommended.

Dave

I run Michelins XRV's all around (235/80/22.5) and my tire manual said to run 85 lbs. rear and 90 lbs. on the steer axle and, I was getting tire squirm. My tire guy (at the Les Schwab Tire Store) told me to run 100 lbs. in all tires and it took the tire squirm away. I'm not saying the other poster who told you to do the opposite is wrong, I tried it and it didn't work for me at all. In fact it worked so well for me that I was able to get 10 years out of my first set of XRV's. I'm now on my second set. You might have to experiment with tire pressures for awhile to find out what works for you. Also, (just a thought) the lower tire pressure you run the more your tires heat up! I got that info off of Michelin Tires Website! Good Luck, to you and, I hope your tire problem gets solved tire squirm is a very uncomfortable feeling. P.S. I'm not a tire expert but, I drove over the road for over 4 million miles (semi truck and trailer) before I retired in 2010 and, I had everything that could possibly of happened to me with tires, happened, I have a lot of experience in dealing with them.

What width rim do you have on the MH? 245's on a 6 in rim could make for a squishy ride.

spotrot wrote:
The Goodyear G670 rears had rivered badly and had little tread after 33k so I replaced the four with Hankook 245/70R19.5 A11's.

The RV felt really squirmy in the back, like the sidewalls flexed way too much. Turn the wheel to the right and it feels like the rear is sliding to the left.

After 4,000 miles and at different pressures it still feels squirrelly, and my wife agrees (I guess there's a first time for everything).

I had to replace the two fronts even earlier and the replacement Bridgestones felt fine (although they won't win any beauty contest).

Anyone else felt the same with this size Hankook lately?

Thanks

John

The same and correct size and you are talking about the duallies, correct?