Hello :
I would like to ask if anyone had the experience to change their tyres from stock tyre size 215/60/r16 to 215/55/r16? The difference is the height of the tyre. The reason why I asked so is because certain tyres such as Michelin PS3 is not available for 215/60/r16 but the 215/55/r16.

I wanted to change to PS3 last time but was told by the tyre shop guy that changing from stock tyre size to PS3 size would be too low for my car even it's just 5mm difference? And that, if I use the PS3 tyre, I would hit the bump when i go over it. Is this true?

Anyone, please share their experience or view. Thank you.

The difference in height is actually 1cm, not just 5mm.
Anyway that difference will not be enough to make your car bump anything on the road, provided your car is still using standard suspension/not using lowering kit suspension. The effect is slightly firmer ride, and less accurate speedo & odometer reading (the actual speed & mileage will be slightly lower than shown). There'll be very minimal improvement in pick up but mostly unnoticeable.

Thanks, I am running on stock suspensions as well. Thanks for the reply!

http://www.1010tires.com/tiresizecalculato...p?action=submit

When changing tyres, you are advised to keep to the 3% rule, Some people say its still safe to go more than 3% smaller overall Circumference but definitely not 3% larger.

For 215/60/16 all your tyre choices are touring only. No performance ones.

in future my exora also hard to find tyre

now using original 195/65/15

plan to use 195/60/15

Did you know when u changing your stock standard aspect ratio to small ration will affect your car speed?

I believe somewhat yes, it will affect the car speed but it's almost not noticeable since it's a very minor change in size.

Is it really affect the car speed? Originally my car is 55 I think, now using 45. Does that really affect my speed?

It will make your car accelerate just a tiny bit quicker but your actual speed will be a little bit lower than the speedo reading.

Hi..sory kacau thread ..What about a slight increase in thickness, in this case 215/45 r17 to 215/50, or 205/50? Will the comfort increment be noticeable? For me 215/45 17 tyre is quite stiff. Pair that with adjustables and poor car sound insulation, i feel like driving a tank.

Yes it will, especially to 215/50 since it will add 1cm to the sidewall thickness. For me, in general I won't use anything thinner than 10cm of sidewall as they already starting to be harsh. 215/45 is only 9.7cm sidewall while 215/50 is 10.75cm and 205/50 is 10.25cm.

Wow, thats good to know. Thanks for sharing

But keep in mind that people do have different perception/feel about comfort. Some can tolerate very harsh ride and can still claim his/her setup as comfortable. Some have even less tolerance than me, hence will say my rides are already harsh. So the 10cm barrier is just for my personal preference, may not necessarily be yours though.

I see. Thats what I figured as well. The only way to know is to find a new set of tyres and test it myself. But the guidelines that u set is kinda useful. I never thought of it that way .. As for me, comfort means less road/tyre noise and more cushioning of rough road surfaces. Hard to tackle road noise, so maybe i'll opt to sound insulation soon (Soundproofing 4 fenders).