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HELP---Bump steer at 60 mph

Discussion in 'Wheels & Tires' started by dongziye, Jul 9, 2016.

  1. Jul 9, 2016 at 1:59 PM
    #1
    dongziye

    dongziye [OP] New Member

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    Hi everyone,

    I got my 2016 Tundra crewmax sr5 three month ago.

    I don't like the original 18 inch tires so that I went to discount tire to get new 20 inch wheels and 275 60 20 tires (goodyear wrangler). I don't lift the suspension.

    I found that the new tires are super sensitive to rough roads. If the road is smooth, it is ok. But it's difficult to handle the steer at 60-70 mph for rough roads.

    Anyone know the reasons?

    Thanks.
     
  2. Jul 9, 2016 at 2:13 PM
    #2
    Sean266

    Sean266 #ThinBlueLine Staff Member

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    Were they road force balanced?
     
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  3. Jul 9, 2016 at 3:37 PM
    #3
    chphilo

    chphilo New Member

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    I am not sure what "super sensitive" means but for the same overall diameter, 20s will ride somewhat rougher than 18s.

    Why would you go 60-70 miles on rough roads though?
     
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  4. Jul 10, 2016 at 6:40 AM
    #4
    dongziye

    dongziye [OP] New Member

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    I think Discount Tire should do alignment after replacing new wheels and tires.
     
  5. Jul 10, 2016 at 6:53 AM
    #5
    bandit

    bandit New Member

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    Duh Tundra
    On top of that it's a 60 series on a 20 inch rim...Definitely not a tire for that at 60+
     
  6. Jul 10, 2016 at 6:54 AM
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    dongziye

    dongziye [OP] New Member

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    The rough roads are not really rough. They are still high ways. The truck runs perfect on smooth bituminous roads.

    However, once the truck on concrete or bumpy bituminous high ways, the steer wheel rotates back and forth a lot. I used to drive a RAV4 and I didn't experience any this kind of shake of steer.

    The original tires were 255 65 18 and the new one are 275 60 20. The overall diameter of new tire is 3% bigger than old one.

    I am not a native speaker so that I don't really know how to explain the feeling. Thanks for your answer anyway.
     
  7. Jul 10, 2016 at 6:57 AM
    #7
    dongziye

    dongziye [OP] New Member

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    My new tires are still all season tires. They run perfect on smooth high way even at 80 or 90+.
     
  8. Jul 10, 2016 at 6:58 AM
    #8
    bandit

    bandit New Member

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    Duh Tundra
    Does the steering wheel shake at a certain speed? Or specifically under braking? Try giving us more details of only when this happens so we can help you better instead of us guessing.
     
  9. Jul 10, 2016 at 7:04 AM
    #9
    dongziye

    dongziye [OP] New Member

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    Thanks for help.

    No, the steering wheel doesn't shake at a certain speed or under braking. Once the road is rough (it's now really rough, it's still a ok highway), the steering wheel shakes a lot at 60+. The steering wheel also shakes at 40-60 on rough roads but not that obvious. It never shakes under braking. I drove rav4 and Camry on the same roads before and their steer wheels didn't shake at all.
     
  10. Jul 10, 2016 at 7:06 AM
    #10
    bandit

    bandit New Member

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    In that case I'd say @Sean266 is on the right track in his previous post. That certainly sounds like a balance and partially an alignment issue.
     
  11. Jul 10, 2016 at 7:09 AM
    #11
    dongziye

    dongziye [OP] New Member

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    Thank you so much. I will go to dealer and check it.
     
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  12. Jul 11, 2016 at 6:14 PM
    #12
    Law323

    Law323 Pray for peace, prepare for war

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    I had this happen to me. I would be fine at low speeds but as soon as I got up to speed on the interstate, it'd start shaking like crazy. After a week or so, I went and got another alignment and rebalanced my tires. Haven't had that problem since.
     
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  13. Jul 12, 2016 at 9:27 AM
    #13
    TheBeast

    TheBeast Mr Line-X

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    ditto to what the others say. Check balancing and get a proper alignment.
     
  14. Jul 12, 2016 at 11:38 AM
    #14
    15whtrd

    15whtrd New Member

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    The 20 inch wheel is giving you less sidewall even though your tire is larger in diameter. It's going to be more sensitive to the bumps in the road and it will never feel like it did with the original 18 inch rims. Unless you went with a larger tire and lift to get you the cushion back. I had a ram before that came with 17 inch rims which I swapped out for factory 20 inch rims. It did like to jump around a little bit more with the stiffer smaller side wall on teh new set up. It's just kind of the nature of the beast with a truck. I noticed when I would go to transitions in the road from asphalt to concrete and it was a slight jump\bump, the truck would kind of kick out a little bit. And on rough pothole roads it like to kind of bump steer around slightly. Nothing that I didn't get used you and didn't really bother me after a while. Just make sure the alignment is on spec and the rims and tires are balanced correctly, beyond that, it is what it is. You are also coming from a car or SUV which is a total different drive than the truck.
     
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