What is result of tire size setting of 2.224 versus 2.233

Did you have stock size tires before and change it to a larger or smaller size? The change in tire size can alter the speedometer readings. Check out this website for tire size speed calibrations - http://www.roadkillcustoms.com/hot-rods-rat-rods/Speedometer-Calibration-Tire-Size-Change-Calculator.asp#axzz2ojsYwmsN

I had the same question and I finally did replace my tires with the same size and I am very happy with the results. The reason they are different sizes was to increase the performance of the SRX. I have 18" wheels and put on ( 245-60R-18 Michelin Lattitude) tires. The reason I selected this size was to minimize the speedo error to 1 mile per hour. I did that by going on line to a tire calculator and compare the original size to the replacement I selected. Now, depending on your rim size you might find that you may have to select a different tire then I. The rule is to keep the spreedo error under 3 MPH. The ride quality was greatly improved with my selection.

When you calculate the sine cosine and tangent, the results you get are pure numbers: They have no dimensions or units because sin cos and tan are ratios of lengths.
However if you are calculating inverse trigonometric functions the results are angles, and they have units.
Use the mode key to set the angle unit to degree. after you calculate the inverse trigonometric functions, your results will be expressed in the angle unit you set in the configuration. If angle unit is degree you will get decimal degrees. To convert to DMS, use the key to the right of the change sign key (-). It is marked with degree symbol followed by what looks like a a double quote and a single quote.

Here's what you need to do. You need to get the tire size off of the tire on your vehicle. Lets say its P205/75R14 or something like that. Go to this link, type that size into the tire on the left, then you can change the tire on the right to whatever size you. You will be amazed what will fit on that vehicle. I wouldnt go over 20" rims if i were you. 22's will leave you very little tire and a very bad ride.

Here's some info on your bolt pattern and wheel offset.

1990 Buick LeSabre 5 lug 4.53 inch or 115 mm High Positive Offset

Heres the tire size calculator
http://www.miata.net/garage/tirecalcold.html

Any question, comment back. If you are looking for 20" rims, 255/30/20 is a common tire that you can find reasonably cheap and lines up perfectly with most vehicles.

Hi and welcome to FixYa

Here is the official website with your product manual, there you can find the user guide manual among other manuals, just click on the link and download it, size is around 15MB.

http://www.retrevo.com/search/v2/jsp/mytrevo/myTrevo.jsp?page=man


Hope this information was helpful

Sincerely,

aDynamite.

You're probably using the - key to the right of the 6 key to enter a negative value. Use the (-) key to the right of the decimal point key instead.

All results are displayed to the FIX setting until you clear the setting by
either pressing [2nd] [FIX] [.] or selecting F (Floating) on the decimal notation menu.
Resetting the calculator also clears the FIX setting.
· After pressing [2nd] [FIX]?, you can select the number of decimal places in two ways:
- Press to move to the number of decimal places you want, and then
press enter, or
- Press the number key that corresponds to the number of decimal places you want.
· FIX affects only the results, not the entry.

Your calculator is set to display results in scientific notation. To change this, press MODE, highlight "NORMAL" on the top line, press ENTER, and then 2ND [QUIT].

Two items to consider when doing that swap...First, the smaller tires must turn faster to go the same speed/distance as the larger ones which will affect fuel consumption and alter speedometer reading. Second, your abs brake system reads wheel speed and having different turning rates may be interpreted as a partial skid which can cause problems. Best to stay with same size on front and rear.

Here's a good tire calculator and it gives you the speedo changes etc.

Tire calculator