YACT: My tires are 185/65r14. Can i use 185/75r14 instead?

[JEDI]

Walmart doesnt have the Goodyear Viva2 in my tire size (185/65R14). it has 185/70R14 and 185/75R14.

they said i cant use those. just wondering why? the 65/70/75 is just how high the tire is with respect to the width, right? so why does it matter if it fits on the rim?

THX

 

[ViperMagic]

make sure to post pics of the result.

 

[Sukhoi]

Have fun with that speedometer.

 

[Heisenberg]

Your sidewall height will be slightly different. This will throw off the speedometer a bit as well as change the final gearing by a small amount. The difference between a 65 and 70 series is going to be pretty small though, so it probably won't make that much difference.

 

[halik]

your speedo will be off. the50/60/70 is the ratio of the heigh to the width of the tire

 

[Evadman]

The tire will be taller, which could cause many problems which can include, but are not limited to: incorrect speed readings, Funny handling(really funny) tire rubbing, steering linkage damage, and fenderwell damage.

Find another brand or go to discount tire.

<edit>
I should probably say that I would use them if it were my car anyway

 

[notfred]

YOu will be going faster than your speedometer says if you use those tires.

 

[CFster]

Here.

and

Here.

and

Here.

There are a bunch of them out there.

Anyway, the second number is the aspect ratio of the tire. If it's a 65, then the sidewall is 65% as high as the tire is wide - or 65% of 185 in your case.

Also, Goodyear tires are crap.

 

[toph99]

http://www.miata.net/garage/tirecalc.html

 

[JEDI]

so those people that Rice their cars and have low sidewalls, they are going slower than the speedometer says? or do they recalibrate?

or is having a lower ratio ok, but not higher?

 

[Vic]

Originally posted by: JEDI
so those people that Rice their cars and have low sidewalls, they are going slower than the speedometer says? or do they recalibrate?

or is having a lower ratio ok, but not higher?

They use larger diameter wheels to compensate.

 

[boyRacer]

Originally posted by: JEDI
so those people that Rice their cars and have low sidewalls, they are going slower than the speedometer says? or do they recalibrate?

or is having a lower ratio ok, but not higher?

Some of them actually take the time and get the proper offset... compensating for the bigger wheel size with a lower profile tire so it more or less stays the same. But then most of them slap on big @$$ rims and whatever tires... so bleh.

 

[jsbush]

You will acutally be going faster tehn your speedometer says, because the tire will be bigger then the orginal, thus turning less often. Example: say your speedometer says 110, you'd be going like 115 or something.


You can go a bigger size, and with that little difference I seriously dought you'll have any handeling differences or tire rubing ect ect. You should be fine, and your car will also report less mileage then your acutally doing.

Of course you should find a tire the right size.

 

[Sluggo]

Oh jebus, if would even throw your speedo off 1MPH I would be surprised.

My tires I have on my truck are about 2.5-3" taller than stock and the speedo is off about 5MPH @ 70MPH (reads 70 you are going 75) Confirmed by a GPS unit and a warning from the friendly State Trooper a couple of days ago.

Just buy the damn tires and be done with it. While you are at it, read this and you can learn how the plus sizing deal works when going up in rim size.

 

[WinkOsmosis]

Your sidewalls will be 2cm taller. That is a huge difference. It will look goofy and your tires may hit the wheel well.

 

[WinkOsmosis]

Originally posted by: boyRacer

Originally posted by: JEDI
so those people that Rice their cars and have low sidewalls, they are going slower than the speedometer says? or do they recalibrate?

or is having a lower ratio ok, but not higher?

Some of them actually take the time and get the proper offset... compensating for the bigger wheel size with a lower profile tire so it more or less stays the same. But then most of them slap on big @$$ rims and whatever tires... so bleh.

Offset has nothing to do with the speedo. Offset is the distance between the center of the wheel and point where the wheel bolts to the car.