[S2]

shit, i think i have the wrong profile tyres on my car...
I have 225/50/16 on rear and
205/55/16 on front


is that right? shouldnt the higher profile be on the back?

AusS2000

That's right.

RedRover

NO - you've got it the right way round

The 225/50/16 go on the rear and the 205/55/16 go on the front

Just look at the placard inside the driver's door and/or your owner's manual and you'll see they're right.

[S2]

yeah thats what i said....

AusS2000

Unless I'm mistaken the '50' and '55' are a ratio of height to width. So the height of the side wall of the back tyre is 50% of 225mm or about 112.5mm. The height of the front is 55% of 205mm or about 112.75mm. So the rolling circumferences are approximately the same.

My rears are 255/35/18. So the side wall is 35% of 255 or 89.25mm. But then I have an extra inch of wheel radius so that's another 25.4mm. Total of 114.65. Near enough to the same.

Here's a great little tool that helps you work out all that stuff:

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

RedRover

this might help too

http://www.tirerack.com/tires/tirete...e.jsp?techid=7

HN2000

got a quote for the 245/45/16 toyo T1-R at a price of $260. Is this a reasonable price ?