worn out Continental PureContact tire finaly a LRR tire.

Discussion in 'Gen 3 Prius Fuel Economy' started by jack black, Apr 10, 2019.

  1. jack black

    jack black Member

    Joined:
    Jan 5, 2018
    168
    91
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    I
    when i switched from moderately worn out OEM ecopias to new purecontacts, i initially suffered 15% MPG loss. after the purecontacts broke in, the difference was closer to 10%. only now, when purecontacts are almost bold, i went back to the ecopia MPG, about 60 in my suburban/city commute.

    but, it's not all bad news. the tires lasted for 70,000 miles, almost twice the ecopia, and that offsets the higher cost of fuel. also, toward the end, the tire wear is almost nothing. 10,000 miles ago, the tires were almost bold, and I ordered a new set online. they are not much worse now. the wear indicators are not quite showing up yet. i'll change it before the next rainy season.
     
  2. jack black

    jack black Member

    Joined:
    Jan 5, 2018
    168
    91
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    I
    no takers? no problem, i'll continue with my thoughts. since LRR testing is not standardized in the US, i wonder to what extend the LRR designation is a marketing slogan. i also wonder if the testing includes brand new or worn out tires. as I said, worn out purecontacts are LRR alright, and maybe that's what continental meant?
    conversely, maybe the OEM LRR tires are constructed in a way that they mimic worn out tires, that would explain why they don't last as long, LOL.
    but seriously, i understand that tires are compromises between traction, LRR, and longevity. you can have 2 of those, but not all 3 in the same tire. and then there is also a retail price limit we are willing to pay for those.
     
  3. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

    Joined:
    Oct 17, 2010
    32,078
    21,055
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah until there's standardized testing who knows.

    Agree.
     
  4. Salamander_King

    Salamander_King Senior Member

    Joined:
    Nov 8, 2015
    2,747
    2,000
    0
    Location:
    New England
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    When I was driving my Gen3, change from OEM Ecopia EP20 to aftermarket Ecopia EP422 Plus to Conti TrueContact, I had almost no mpg loss. Your 15% loss is really big. In fact on Gen3, comparing OEM Ecopia and Micheline Xice3 snow tires during winter months drives had less than 1% loss of MPG. That said, on my current PRIME, switch from OEM Dunlop Enasaver to Micheline Xice3 snow tires dropped the MPG ~20% from ~62 mpg to ~48 mpg. Go figure.
     
    #4 Salamander_King, Apr 11, 2019
    Last edited: Apr 11, 2019
  5. jack black

    jack black Member

    Joined:
    Jan 5, 2018
    168
    91
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    I
    interesting. this is in a controlled city/suburban commute with pulse and glide regimen between red lights and turns optimized for MPG, but with no speed compromise. i'm sure the high speed hwy results would be completely different.
     
  6. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

    Joined:
    Oct 17, 2010
    32,078
    21,055
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Not sure why.
     
  7. jack black

    jack black Member

    Joined:
    Jan 5, 2018
    168
    91
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    I
    not sure either. initially i thought at hi speed hwy driving tire rolling resistance is lower % of all energy loss vs low speed city driving, but it's actually the other way around. i'm thinking more rolling resistance disturbed the highly tuned pulse and glide system i used.
     
    #7 jack black, Apr 15, 2019 at 11:26 AM
    Last edited: Apr 15, 2019 at 11:32 AM
    Mendel Leisk likes this.
  8. Salamander_King

    Salamander_King Senior Member

    Joined:
    Nov 8, 2015
    2,747
    2,000
    0
    Location:
    New England
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    To be fair, I was not comparing those three different tires under controlled conditions. Most of the driving was low speed in town drive not on highway speed, for I do that type of driving very rarely. And I had Conti Truecontact on Gen3 for less than 3 months before I traded in.
     
Loading...