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spotrot's avatar
spotrot
Explorer
Sep 01, 2013

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

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
Class A

18 Replies

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  • Ritglor's avatar
    Ritglor
    Explorer
    Sep 01, 2013
    Same tires,A11's, on my Voyage for the past 3 years -- no problem. Would buy them again.
  • enblethen's avatar
    enblethen
    Nomad
    Sep 01, 2013
    Weigh your rig.
    Then get the air pressure chart from Hankok.
    Adjust your air pressure according to it.
  • gbopp's avatar
    gbopp
    Explorer
    Sep 01, 2013
    I replaced the Michelin's on our Southwind with Hankook. No problems, I'll buy Hankook again.
  • jhilley's avatar
    jhilley
    Explorer
    Sep 01, 2013
    I have Winnebago Adventurer 38G with the same size Hankook AH11 tires. 90# in front and 85# in rear, handles great.

    Once had a problem when we left home below zero. As we were coming down the grade into St George, UT, the first warm weather we hit, it started acting poorly. Spent the night in Mequite, when cool in the morning there was over 100# in the front tires. Let air out down to 90# and handling returned.
  • mike_brez's avatar
    mike_brez
    Explorer
    Sep 01, 2013
    I have 225/70r/19.5 AH11s I found the chart the same. For a single it starts at 80psi for 3,150lb and 80psi for 3,000lb dual. I guess you could always do the chalk test on the tire treads.
  • spotrot's avatar
    spotrot
    Explorer
    Sep 01, 2013
    "Too much air " seems counter-intuitive so I would never have suspected that, but thanks, I'll give it a try.

    The dlr did inflate them high (105 psi. I have them now at 95 psi but will drop them to 80 psi.

    The tires are so big relative to the load (I believe they use the same ones on 35" moho's and mine is a 30')that the actual load weight is not even on the chart. So I'll try the lowest number on the chart - 80 psi.

    Lowering the pressure sounds crazy but I'll give it a try next week when I drive from RI to FL.

    Thanks for the suggestion.
  • Ivylog's avatar
    Ivylog
    Explorer III
    Sep 01, 2013
    Too much air in new rear tires will do this. On a previous MH the dealer put in 120 even though I requested 95 and the back of the MH was all over the place until I reduced the pressure. How much does your rear axle weigh and how much pressure are you running? I recently put 6 new 11R/22.5 AH11 on the rear of my MH and it handles the same as before... very good.

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