Tire Sizes...

[lt1tyrell]

I am getting ready to replace the tires on my 91 tercel. From the information I can find the original tires should be 155/80/13. My car has 185/70/13's on it right now. So I think they are about an inch taller than factory. Should I go back to the factory size or stay with whats on it? It is a 3 spd auto so with out OD it is a little buzzy on the highway and I guess it would rev a little higher if I went back to the original size. Also, anybody know a good cheap brand of 13'' tires? Thanks.

[bkftl]

yeah i think they are called R13 tires, fairly cheap around 30$ a peice. Check at ur local tireshops, they usualy have some kind of a deal like 4 tires for price of 3 or discount for buying 4 at once. check it out.

Im not realy sure what numbers mean also where did u find these numbers?

[turtle10]

Here is an easy to use tire calculator:
http://www.discounttire.com/dtcs/infoTireMath.dos

You should be able to use 175/70-13 tires with no problems. They are only .11 inches shorter. You find this out by entering the tire measurements in each side of the calculator and click "Specs/Compare".

175 is the width in mm.
70 is the aspect ratio for the side wall height. 70% of 175mm.
13 is the wheel diameter in inches.

You may need to check inside clearances near the struts/shocks because they are 20mm wider than stock.

-Michael

[noahthefrog]

The 185 in the size is the width of the tire and the 80 or 70 is the ratio of the width to the height if I remember correctly. I have 175-70-r13's on my '89 tercel and they seem to be a good fit. I don't recommend the 155 tires - the cornering is not very good with such a thin tire. If the 185's have been serving you well, then I would replace them with the same size. Wider tires give you better cornering.

[nighthawk8]

Ya i wouldn't recomend the 155 80 r13. depending where you are in canada, you can get the motomaster tires from canadian tire. The 155 80 r13's are like 34 bucks each

[Tercel GTS]

When I had stock wheels I used goodyear viva tires from walmart.