Rough/stiff ride after new struts/shocks

Discussion in 'Gen 3 Prius Main Forum' started by markjosh51, Nov 14, 2019.

  1. George W

    George W Active Member

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    With my current tires, 35psi is sluggish and detrimental to economy. 2-3 mpg lost easily, that isn't just noise. 40 (and slightly higher) gets good handling and acceleration. Damn you Discount Tire!!
     
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  2. tvpierce

    tvpierce Senior Member

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    Your mechanic gave you good advice.
     
  3. markjosh51

    markjosh51 Junior Member

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  4. bisco

    bisco cookie crumbler

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    great, how many miles did it take?
     
  5. markjosh51

    markjosh51 Junior Member

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    1,000
     
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  6. bisco

    bisco cookie crumbler

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    thanks, that seems reasonable
     
  7. markjosh51

    markjosh51 Junior Member

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    Yea but my new tires are noisy.
     
  8. bisco

    bisco cookie crumbler

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    they may get a little quieter. did you lower the pressure?

    what tires did you replace?
     
  9. markjosh51

    markjosh51 Junior Member

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    I replaced them with the Bridgestone Ecopia 422 plus. I was going to replace them with the Goodyear Assurance Fuel Max but they told that the Bridgestones were better with tread wear.
     
  10. The Critic

    The Critic Resident Critic

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    Buy struts and shocks from the dealer. The KYB Excel-G's are aftermarket parts which are tuned differently.
     
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  11. tonynap

    tonynap Member

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    I could have been clearer. I experienced a harsh ride after going from 89H to 91H because I over inflated the tire.

    If you're not changing the size of the tire, you're don't need to make an adjustment for PSI.
     
  12. Pdaddy

    Pdaddy Member

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    The KYB are "OEM" and they supposedly also make the originol Toyota part, but while the aftermarket part may meet the OEM specification based on my experience replacing all with KYB at 210,000, that the part is not the same as the Toyota part-- the ride, while not bad, is noticable rougher over the Toyota part. Should absorb speed bumps just fine.

    SM-G960U ?
     
  13. Pdaddy

    Pdaddy Member

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    Aren't the 422s a cross-over tire? While it's an eco tire it will ride rougher for crossover type vehicles over a passenger vehicle?

    SM-G960U ?
     
  14. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    My method for absorbing speed bumps is to slow to a dead-crawl. I hate those damn things, especially when they're planted every 20 feet or less.
     
  15. Pdaddy

    Pdaddy Member

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    Yes. Absorb at or below the speed limit.....25 mph for humps and 10 or less for bumps.

    SM-G960U ?
     
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  16. JC91006

    JC91006 Senior Member

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    A while back I had a 4 runner that had a great ride with Bilstein shocks/struts, but they were over 10 years old and I decided to change them out with KYB shocks/struts. What a big mistake, the ride became horrible, stiff and bumpy. It ultimately lead to me selling the 4runner cause I couldn't take the harsh ride anymore.

    I would think this is the same with the Prius KYB shocks/struts. I recently changed my 05 Prius with original OEM Toyota shocks/struts and the ride is excellent. So I think the KYBs are very different than the OEM stuff that Toyota sells.
     
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