Question about Tires on Ion I

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?

Thanks!

Tom

Thomas Nickerson wrote:
> 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?
>
> Thanks!
>
> Tom
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.

On 14 Oct 2006 17:19:54 -0700, "Q" > wrote:

>
>Thomas Nickerson wrote:
>> 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?
>>
>> Thanks!
>>
>> Tom
>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.


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

http://www.snoman.com/HTML/axlecalc_5a.html
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