Question about Tires on Ion I

Discussion in 'Saturn ION' started by Thomas Nickerson, Oct 14, 2006.

  1. Does anyone happen to know if 185/65R14 tires will fit on an Ion 1
    built for 185/70R14? I have a line on some cheap tires/rims, but of
    course they are not quite the same size. What will happen if I use 65s
    instead of 70s?


    Thomas Nickerson, Oct 14, 2006
  2. Thomas Nickerson

    Q Guest

    Hello Tom,

    comparing the aspect ration of the 2 tires they tire with P185/70R14
    will have and total of 18.5mm in diameter. Check the wheel well
    clearance to see if is allow.

    Aspect ratio is calulate by height (of side wall) / Width of tire tread
    = 70% of the second tire.

    Even they may fit. The new tires installed will not give you the
    correct vehicle speed. I may run faster than the speed seen on the
    speedometer. Besides, the PCM/ECM and Transmission (TCM) may use the
    speed for other calulation as well.

    Beaware when you replace them.
    Q, Oct 15, 2006
  3. Thomas Nickerson

    SnoMan Guest

    You will find a tires size and acle ratio ca;culator here to com[utr
    tru tire size and effect on speed too.
    SnoMan, Oct 15, 2006
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