Tire size??

[Newf]

Any experts here on tire sizing? Here is my question...my Hyundai Santa Fe has P235/70/R16 tires on it right now and I am wondering if it will be ok to put on P225/60/R16?? So I would be using a smaller tire in terms of width and wheel wall height...is this ok?? I appreciate opinions ofcourse, but kinda need to know if its ok or not ok. Any pros out there in this particular department? Thanks! :)

[eyeQ]

goto tirerack.com, I just replace today a 215/45-17 down to 195/60-16:yes: using their guide:thumbsup:

Check the Hyundai Santa Fe forum as well.

[zoogor]

225/60 should go on no problem.
i am surprised however that eyeQ was able to drop an actual inch in size. i wouldn't have thought they would fit on the rim.

[tonton33]

Any experts here on tire sizing? Here is my question...my Hyundai Santa Fe has P235/70/R16 tires on it right now and I am wondering if it will be ok to put on P225/60/R16?? So I would be using a smaller tire in terms of width and wheel wall height...is this ok?? I appreciate opinions ofcourse, but kinda need to know if its ok or not ok. Any pros out there in this particular department? Thanks! :)

its widthsamler:thumbsup::thumbsup:

[JCO]

225/60 should go on no problem.
i am surprised however that eyeQ was able to drop an actual inch in size. i wouldn't have thought they would fit on the rim.
Diferent rims... :innocent:

[eyeQ]

225/60 should go on no problem.
i am surprised however that eyeQ was able to drop an actual inch in size. i wouldn't have thought they would fit on the rim.

I change the rims too from 17 -->16 as an example and minimize the expenses in the long run:D:

[zoogor]

that makes more sense. lol

[StanW]

I change the rims too from 17 -->16 as an example and minimize the expenses in the long run:D:
.. + less chance of getting a speeding ticked - you're going slower than the speedometer reading :D

[JCO]

.. + less chance of getting a speeding ticked - you're going slower than the speedometer reading :D

Isnt that what the $50 dollar bill taped to your drivers licence is for, eliminating any chance of getting ticketed?? LOL

[StanW]

With my luck I'd probably come across the only honest cop in a 50 mile radius and end up handcuffed on the side of the road.lol

[JCO]

With my luck I'd probably come across the only honest cop in a 50 mile radius and end up handcuffed on the side of the road.lol

Ask to speak to his supervisor...LOL

[Terryl]

Stans right, if you lower or raise the overall diameter of the tire you will affect the accuracy of your speedometer, so some tire centers will not let you put the wrong size tires on your car, as long as the outside diameter does not change your OK.

Also on some cars with front wheel drive you have spacing problems, you can’t put a wider track tire or taller profile tire on some as they will rub on the inside as you turn the corner.

So going from a 70 series to a 60 series will reduce the diameter of the tire if you keep the same size rims, you have to look at the revolutions per mile to keep your speedometer accuracy.

Example: (I could only do this for 15” tires)

235R-70 15 = 722 revolutions per mile, over all diameter is 28”.

235R-60 15 = 773 revolutions per mile, over all diameter is 26.1”

You can see it will affect the accuracy of your speedometer.

So going to a different profile tire may get you a ticket or make you the slow one in the fast lane, you may also have to change your rims to keep the diameter with in the range of wheel rotation for your speedometer.

[Newf]

so if I use those tires I will actually be going slower than the speedometer will read...the smaller tire will make more revolutions per minute, therefore making the speedometer think the vehicle is going faster than it would read on a radar?? or am I mixing that up?

[Terryl]

Here is a good link to a tire calculator and comparsion site

http://www.powerdog.com/tiresize.cgi

[Terryl]

so if I use those tires I will actually be going slower than the speedometer will read...the smaller tire will make more revolutions per minute, therefore making the speedometer think the vehicle is going faster than it would read on a radar?? or am I mixing that up?

Old tire size = 60 MPH
New tire size = 65 MPH

you will be going slower, but according to your speedo you will be going faster...

Lets say at 60 MPH on the old tires the engines RPM was 2000, at the same 2000 RPM on the new tires you will be going 55 MPH, this also shows a drawback, to go with the flow of traffic at 60 MPH you will have to drive faster, (65 MPH) engine RPM goes up so your gas mileage goes down.

[Newf]

Thanks for all the info everyone, especially TerryL...I am only using these tires for 1 winter to save some money...I had them left over from my previous vehicle and they are in excellent shape...I use my vehicle very rarely because most of the time I am in my company van...so the things listed are not a huge concern for me...hopefully the garage will install them for me as I do need them balanced on the new rims.

[Newf]

Here is a good link to a tire calculator and comparsion site

http://www.powerdog.com/tiresize.cgi

Thanks! Great site, exactly what I was looking for!

[satchick]

I don't see why the garage wouldn't install them, as long as they have the same load and speed rating. I'm also running one size smaller on my Town Car, and narrower tires are actually better in the snow!

[kaysar]

I don't see why the garage wouldn't install them, as long as they have the same load and speed rating. I'm also running one size smaller on my Town Car, and narrower tires are actually better in the snow!

The reason most reconized tire shops will not install different sized tires is because it has been know to mess with your anti lock brake sensors. The sensors are calabrated to run with a set tire size. runniing the wrong size tire can result in the antilocks coming on prematurely or even not come on at all.

[JCO]

The reason most reconized tire shops will not install different sized tires is because it has been know to mess with your anti lock brake sensors. The sensors are calabrated to run with a set tire size. runniing the wrong size tire can result in the antilocks coming on prematurely or even not come on at all.

ABS works with a sensor that detects your wheel locking up. Tire size wont affect it ..

[satchick]

Old thread I know, but as a reference for others with this issue; depending on the car, the speedometer and ABS/TC/ESC are all controlled by the ECM or other modules. The dealer service department can recalibrate the system for a different size tire. You will have to pay for it though, it's usually $110 or something for a flash. Old cars with a cable driven speedo will need the speedometer gear replaced though.

It's done quite often for vehicles with dealer-installed optional wheels/tires.

[aweber]

Never heard of anybody putting smaller tires on a "truck" LOL The only advantage I can see is if you tow and need the extra power...