1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Gen 5 tire sizes

Discussion in 'Gen 5 Prius Main Forum' started by Hammersmith, Nov 19, 2022.

  1. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    44,767
    16,016
    41
    Location:
    Canada
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    That still requires manufacturers to actually produce that tire size.
     
    Mendel Leisk and farmecologist like this.
  2. farmecologist

    farmecologist Senior Member

    Joined:
    Jun 25, 2015
    1,945
    1,785
    0
    Location:
    Southern MN
    Vehicle:
    2012 Prius v wagon
    Model:
    II
    BTW - on the oil type for the new Prius. It is 0W16...See pic below. Pic was taken from one of the walkthrough videos. (y)

    Prius Engine Bay.jpg
     
    Trollbait and Tideland Prius like this.
  3. shoreview

    shoreview Junior Member

    Joined:
    Sep 21, 2020
    13
    11
    0
    Location:
    Illinois
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    There's just nothing in any common tire available in North America in narrower than a 205 for 17, or a 225 for 19. The 205-225 difference would presumably explain MPG issues one is likely to encounter with a 19, but narrower than 205 in the 17 would strike me as really problematic for both handling and tire choice, and something of a dealbreaker in buying the car. Hope this gets cleared up. Also a fair bit depends on the diameter of the wheel; if it's 26.something inches as I've seen suggested elsewhere, a 215/55R17 would be a fairly mainstream fit but the 205/55R17 might be on the small side diameter wise and there doesn't seem to be a 205/60R17. And the 205/50R17 that I suspect would fit OK on a current Prius or anything else designed for 25 inch diameter wheel/tire combinations will be too small on this new one.
     
    reallyreal likes this.
  4. PriusPeep

    PriusPeep Member

    Joined:
    Dec 17, 2016
    90
    62
    0
    Location:
    New Jersey
    Vehicle:
    2017 Prius
    Model:
    III
    I want the trim with the larger screen. That means I have to get the Prius with the ridiculous and unnecessary 19" tires.

    Why, Toyota? I drive the 2017 Prius 3 with 15" tires. It drives great. I have driven in snow countless times. It's never been a problem unless it's a blizzard and, even then, you can drive if the streets are plowed.

    I don't like the extra weight on 19' tires and the likely increased road noise.
     
  5. Rmay635703

    Rmay635703 Senior Member

    Joined:
    Oct 16, 2016
    2,567
    1,595
    0
    Location:
    Somewhere in Wisconsin
    Vehicle:
    2013 Chevy Volt
    Model:
    N/A
    If Toyota wanted stupid tire sizes they should have stuck with exactly the i3 size,
    It’s a massive kick in the nuts using what will be a $300 tire and hardly available
     
    Tideland Prius likes this.
  6. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,468
    38,103
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Stick with what you've got?
     
  7. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    21,593
    11,212
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    They are larger diameter than the current Prius tires, which could actually help with efficiency. They are the same width as the current car, so snow handling shouldn't have changed much.
    The i3 size is unique. Sounds like the size on the new Prius is popular in Japan.
     
    drash likes this.
  8. Sarge

    Sarge Senior Member

    Joined:
    Nov 28, 2005
    1,298
    757
    1
    Location:
    Milton, Ontario, Canada
    Vehicle:
    2023 Prius Prime
    Model:
    XSE Premium
    This is my understanding as well - I find it hard to believe Toyota would have used this size if it was a (significant) hit on efficiency.

    The only concern is availability and possible cost if there are limited options, but I would think that Toyota would have explored / planned for this with tire manufacturers in a major market like the US (and by extension, Canada...)… Right? Right?? o_O
     
    Tideland Prius likes this.
  9. Christopher O'Brien

    Joined:
    Aug 30, 2012
    153
    79
    0
    Location:
    Toronto
    Vehicle:
    2013 Prius Plug-in
    Model:
    Plug-in Advanced
    I don't like really low-profile tires like on the 19" wheels. Surely ride comfort suffers, plus the wheel wells looked overstuffed with wheel. Haven't seen a photo of the 17" wheels yet, but in the Gen 5's wheel wells they might end up looking a bit understuffed like the 15" wheels on the present Gen 4. Maybe 18" wheels would do the trick—better looking and more ride comfort. Any thoughts?
     
    drash likes this.
  10. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    44,767
    16,016
    41
    Location:
    Canada
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Comparing the new tyres with the old:

    195/50R19 = 97.5mm sidewall
    215/45R17 = 96.75mm sidewall

    195/60R17 = 117.0mm sidewall
    195/65R15 = 126.75mm sidewall

    It'll definitely have a stiffer ride with less cushion but that can always be adjusted with the spring and damper settings.
     
    drash likes this.
  11. Prashanta

    Prashanta Active Member

    Joined:
    Oct 11, 2016
    292
    242
    0
    Location:
    Canada
    Vehicle:
    2017 Prius Prime
    Model:
    Technology
    Could you explain how the 17" tire has a smaller sidewall than than 19" one? Are the tire diameters different? What good reason is there for having different diameter tires?
     
  12. Louis19

    Louis19 Active Member

    Joined:
    Feb 4, 2022
    347
    309
    0
    Location:
    Laval Québec Canada
    Vehicle:
    2022 Prius Prime
    Model:
    Upgrade
    Well for the sidewall,that is a 0.75mm difference or 1/32in difference ......pretty close.:rolleyes:
     
  13. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,468
    38,103
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yes.

    Well, nominal size, ie 17” vs 19”, yes. Outside Diameter, they’re reasonably close to each other. Have to be, for ride height, odometer, speedometer, “gearing”, and so on.
     
    Tideland Prius and Trollbait like this.
  14. CamryDriver

    CamryDriver Active Member

    Joined:
    Jan 19, 2018
    541
    391
    0
    Location:
    Arkansas
    Vehicle:
    Other Hybrid
    Model:
    N/A
    Screenshot_20221206_085714.jpg Screenshot_20221206_085904.jpg
     
    Tideland Prius likes this.
  15. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,468
    38,103
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I meant these two (5th gen) sizes need to be reasonably close:

    195/50R19
    195/60R17
     
    Trollbait likes this.
  16. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    21,593
    11,212
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    @Tideland Prius had a typo, the 17in rim aspect ratio is 60 or 65. The overall diameter is 27in for the combo; 0.3in larger than the 19in. With the tire sizing system, getting the same overall diameter is difficult if just changing the aspect.
     
    Mendel Leisk likes this.
  17. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    44,767
    16,016
    41
    Location:
    Canada
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    I thought it’s 195/60R17 and 195/50R19??


    @Mendel Leisk and @CamryDriver have good posts explaining it.

    I was comparing the new tyre specification to the Gen 4 specifications.

    Honestly, I think they went for looks for the 19” but also didn’t want to give up fuel efficiency which is why they kept the 195mm width tyres rather than widen it to something like a 225 or 235mm width tyre that is typical of a 19”.
     
    Mendel Leisk likes this.
  18. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    21,593
    11,212
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    I, and apparently @Prashanta , took your post format to be grouping the wheel sizes together by model year, not small or large equipped wheel sizes of each gen together.

    Current car has 15" and 17" wheel sizes. The new has 17" and 19". The 17" overlap requires paying closer attention to the tire size to differentiate which car is being discussed.
    The new Prius tires are 2 inches larger in diameter than the old one's. That was likely chosen for efficiency. Larger rims are nearly always about style. Maybe that tire size is more common in Japan. Wider tires would hurt efficiency, but there could be clearance issues too. NA might get a wider tire, if the 195 size is an issue.

    The 19in wheel might be too narrow for 225 to 235 tires for those thinking of swapping.
     
    Tideland Prius and Mendel Leisk like this.
  19. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,468
    38,103
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Too, maybe we need to wait for official 5th gen tire specs. If these are the correct sizes, there's a not insignificant 1/2" difference in the OD's (Outside Diameters):

    195/50R19: 26.7"
    195/60R17: 26.2"

    OD's determined using this calculator:

    Tire Size Calculator
     
  20. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    21,593
    11,212
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    A 195/65R17 would be 27 inches.

    CarBuzz reported the rim width as 7 inches.