Tire size info for 2015 Prius C

Discussion in 'Prius c Technical Discussion' started by Lindaluv, Dec 15, 2020.

  1. Lindaluv

    Lindaluv New Member

    Joined:
    Dec 14, 2020
    3
    0
    0
    Location:
    Michigan
    Vehicle:
    2015 Prius c
    Model:
    Two
    Can the 2015 Prius C model two use 195/65r15 tires? It currently has 175/65r15s on it, but the Goodyear app says that the version four can use a 195 tire which I like. It does not show it as usable with the version two. Do any of you guys know? if I do change sizes will this affect anything else that I should know about? Thanks for the help!
     
  2. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    4,100
    4,022
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    The Four version was offered with a different optional wheel and tire combo. If I remember right, it was actually a 16" wheel, not 15". It also had a different steering rack and a much wider turning circle than the regular c to keep the tires from rubbing on the fenders.
     
  3. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

    Joined:
    Oct 17, 2010
    42,682
    30,544
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    The recommended tire size(s) are shown in Owner's Manual. If there's more than one size they will INVARIABLY have the same (or very close) outside diameter. The two tire sizes you mention are different; the (unauthorized) larger OD alternative you mention will:

    1. Raise the car.
    2. Throw off the odometer.
    3. Throw off the "gearing".
    4. Fool the speedometer into thinking you're going slower than you are.
     
  4. Lindaluv

    Lindaluv New Member

    Joined:
    Dec 14, 2020
    3
    0
    0
    Location:
    Michigan
    Vehicle:
    2015 Prius c
    Model:
    Two
    Thank you so much for this response. I couldn't get a straight answer out of anyone even at the dealership. I sure appreciate you taking the time to fill me in.
     
  5. Lindaluv

    Lindaluv New Member

    Joined:
    Dec 14, 2020
    3
    0
    0
    Location:
    Michigan
    Vehicle:
    2015 Prius c
    Model:
    Two
    Thank you. No one would tell me or at least they pretended not to know. These are the types of things I suspected a larger tire could cause to happen. This forum is the only place I found where I could get a straight and knowledgeable answer.
     
  6. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

    Joined:
    Oct 17, 2010
    42,682
    30,544
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah increasing from 175 to 195 (tire width), and considering the 65 number (tire width to height ratio, as a percent), the tire outside radius increases by:

    (195-175)x.65

    Which works out 13 (mm) increase. This is significant, well out of spec. Minor diff's of 1~2 mm are acceptable, but not 13.

    For some 13 would be acceptable, but it's into uncharted territory, not condoned by Toyota.

    Besides the aforementioned downsides, it'll make the car take corners a little different, reduce stability, basically make it more tippy.
     
  7. Sir Drives Alot

    Sir Drives Alot Junior Member

    Joined:
    May 27, 2016
    18
    27
    1
    Location:
    SF Bay Area
    Vehicle:
    2018 Prius c
    Model:
    II
    I have done some research into this, as I am thinking of going to a 195mm section width tire when the time comes to repalce the stock tire. I have found that 195/60/15 is only +0.8% from the stock tire size, so will have less of an inpmact on the odo, etc. The question I have not been able to get a clear answer on is about putting a 195 mm tire onto the 5" stock wheel. The tire mfgrs. I have looked at (Continental, Yokohma) say that this size tire can fit on the 5" wheel, but other sources say that the minimum wheel width for the tire is 5.5 ". Anyone with experience with this?
     
  8. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    4,100
    4,022
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    It's been a long time since I installed tires for pay, but I would always trust the fit application data from the manufacturer. If (for example) Continental says theirs will fit a 15x5 rim, trust them.
     
    Pri3C and Sir Drives Alot like this.
Loading...