You should have 165/65/13. 175/65 is too high. Difference is 13mm in total wheel hight so your speedometer show for example 100 kph but trully your speed is 110 kph or something like that.

 

My ka also has 175/65 R13. It is a 2001 model. Anyway it looks better with them. The diffrence is: when your speeder measures 70 mp/h you actualy have 71.67 mp/h!

 

which in REAL speed is still about 65mph

 

im confused as someone at work has a ka with 175 tyres on too

 

They should be 165/65/13s, but running with 175s isn't going to make a world of difference...

 

165/175 is tyre width which does not make any diffrence to your speedo tyre profile ie 45 ,50 , 55 ,60, or 65 changing this can change your speedo reading , when putting bigger alloys on your car people put a lower profile tyre on to keep the overal wheel and tyre size the same.

 

165/175 is tyre width which does not make any diffrence to your speedo tyre profile ie 45 ,50 , 55 ,60, or 65 changing this can change your speedo reading , when putting bigger alloys on your car people put a lower profile tyre on to keep the overal wheel and tyre size the same.

 

Have you been drinking bonka?
I'm seeing double posts

 

Tyre sizes are wierd things. 165/60/13's will have a lower profile that 175/60/13's. There's a mix of metric and imperial that defies logic. the first number is the width of the tyre in mm. The second number is the height of the tyre expressed as a percentage of the width. Confused? The third number is the size of the wheel, in inches! Does anyone make a 13 1/2 in wheel? Or tyre for that matter. All very nuts, and just the way things have evolved. Doesn't make our lives any easier though.

 

Spot on. Although the profile remains the same, it's a percentage of a width.

Hoshi uses 195/60 tyres on a 15" wheel (this gives scope for 18s without any fuss or bother with steering lock, clearance or whatever mwahahahaha), but although they have the same profile as Kermy's 185/60s, they're slightly "taller" in the rubber.

The base or control tyre for the Ka is a 155/70/13. 165/65/13s are 99.54% of this size, so barely smaller. 175/65/13s are 101.92% so a little bigger. 165/60/14s, used on those 1.3s with alloys, represent 101.17%. It won't matter that it's on 175/65s from a speedo perspective.

Kermy's 185/60s were 100.91% of the control tyre.

 

Mixed up my words there a bit, but you got what I meant! So x/60/y tyres will have different height tyres, depending upon the value of x.

It seems like the origional poster has been the victim of workshop scaremongering, because most of us don't have a clue what the numbers mean. A bit like Ford charging £300 to fit a hardtop kit for the StreetKA. It sounds like a big job, and unless you're going to stand there watching while they do it, who's ever going to find out?

 

Many people reckon big / small / big is the best compromise, but on almost roads for almost all cars, it isn't.

It's possible that 175/65/13s are used by a bunch of cars. The Ka's 165/60/14 size is a little unusual so I'd suppose the 165/65s are too.

I'd have no problem myself running on 175/65s (and was considering it when Kermy's 185/60s wore out).

 

So... to answer the question id say dont worry about it. Go with 165 if your changing, but if not, dont worry!...

.. i think lol

 

In fact 175/65 r 13 are a bit taller than 165/65 r13 because.. 65 is 65% of 175!

 

thank you fo all your replys

 

oops my dad has just checked all of my tyres and he says there well illegal, so ive got to get 4 new tyres anyway oh well

 

All Ka's in America fits 185/60 R14.

I personally changed my tires for 195/60 R14, awesome change !!!!, I had to put spacers for the front wheels (they were rubbing), back tires fitted perfectly.

In the Mexican Club is very common to fit 205/45 R17, depending off the Wheel offset.

 

So with 14 inch wheels 185/60 will fit with no problem? Are you sure?

 

I personally changed my tires for 195/60 R14, awesome change !!!!.

Cool :wink: Does it look like 4x4 now ? On wheels which are 45mm (1,8 inch) too high it should 8)

In the Mexican Club is very common to fit 205/45 R17

Strange club... This wheel is 71,6mm (2,8 inch) too high :mrgreen: It must look really cool :twisted: