Tire sizes, +16, +17, how to make up on spedometer?

Discussion in 'Gen 2 Prius Main Forum' started by hunterxaz, Jun 20, 2011.

  1. hunterxaz

    hunterxaz New Member

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    So some of the links on this site like here, Tire size calculator shows a change of 24% switching from a 15 tire to 17", that's huge. How can you offset that?
     
    #1 hunterxaz, Jun 20, 2011
  2. xpcman

    xpcman Senior Member

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    you change to a lower aspect ratio to keep the overall diameter close to the original.

    for 17 inch you use a 205 45 tire

    for 16 inch you use a 205 50 tire
     
    #2 xpcman, Jun 21, 2011
  3. F8L

    F8L Protecting Habitat & AG Lands

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    For a 17x7 or 17x8 wheel I would suggest a 215/45/17 or a 205/50/17. These sizes will keep you close to you OEM tire diameter. More importantly, the size tires I suggested will help correct the 2mph error (too fast) the speedometer exhibits. The 205/45/17 is really close to OEM size and will definitely work but it is a bit smaller than oem size so the speedometer error gets worse. Your call. :)
     
    #3 F8L, Jun 21, 2011
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