Alright, here is the deal.
I have a car that requires 185/70/14 tires.
I however came across 185/65/14 tires.
Here is the dilemma.
I want the 185/65/14 so the car will sit a little lower and the fact that they are h rated as oppose to s rated.
My question is this I did a calculation and it says
NOTE: Changing the tire diameter CHANGES the SPEEDOMETER accuracy!

This ALTERNATE tire size will cause the 'Actual Vehicle Speed' to be
63.043 mph, when the speedometer reads exactly 65mph.

Or, when the 'Actual Vehicle Speed' is 65mph the speedometer will now read 67.017

Also, the ground clearance of the vehicle will change by .364 inches.

Now my question is this.
How much would it affect my odometer

 

Guess:

you'll put miles on at a 1.031:1 ratio?

 

Curious: Why is the odometer reading that important to you?

I mean, if you're worried about scheduled maintenence or oil changes, the odometer reading wont be drastically off to where you're over 200 miles on your 3000 mile oil change.

I'm not saying you're crazy for being concerned, i'm just trying to see your POV.

 

You will experience such variations when comparing a brand new tire to a worn tire....it's really not that much. But if you are really concerned just get the stock size.

Changing the size of your tires is not the way to change the height of your car.

 

thanks for the replies
I checked it online, but every time in that size is s or t rated.
I want something with a little thicker rubber so the tires won't wear out as quick.
I'm just going to bounce on the 185/64/14
screw it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenHonda &raquo;</TD></TR><TR><TD CLASS="quote">I want something with a little thicker rubber so the tires won't wear out as quick.</TD></TR></TABLE>

"Thicker" rubber has nothing to do with how long the tires last.

Stick with your stock size of 185/70-14.

 

Yeah it does, the higher speed rating holds up to highway miles easier.
My tires are worn out after 30k, of regular driving.
I cruise at 80-90 daily

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenHonda &raquo;</TD></TR><TR><TD CLASS="quote">Yeah it does, the higher speed rating holds up to highway miles easier.</TD></TR></TABLE>

You were talking about tire SIZE before. Now you're talking about speed ratings.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenHonda &raquo;</TD></TR><TR><TD CLASS="quote">My tires are worn out after 30k, of regular driving.</TD></TR></TABLE>

Tire wear is a function of a lot of things. In general, it has nothing to do with the speed rating. It's somewhat related to the treadwear rating, but even that is not always accurate.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenHonda &raquo;</TD></TR><TR><TD CLASS="quote">I cruise at 80-90 daily</TD></TR></TABLE>

Then you really don't need tires with speed ratings higher than S or T. Heck, they don't even have to be as high as S or T.

Sounds like you really don't understand speed ratings, and don't know much about tires. But hey, if you want to waste your money on the wrong size tires for your car, go ahead, be my guest...