Largest factory OE wheel and tyre combo

[///MAZI]

I am starting to really gel with the IQ.

It feels a bit skittish on crap surfaces which is probably because of the short wheelbase. Also the tyre spin very easily and the 175/60/16 tyres seen to spin without  provocation. I have the 1.33 and unless you are super measured with the clutch, the wheels will spin.

I am not a boy racer and dont want my car to look like a max power special.

[flash22]

What tire brand, and what is the date stamp ? Cheap or old tires (the compound goes off and makes them go hard) will spin in the wet and the dry, mismatched tread patterns has the same effect

https://www.wheel-size.com/size/toyota/iq/2009/

 

[1990autoenthu]

It will be best to add more information so that we can help you out. 

[///MAZI]

Tyres Bridgestone and are old, the 2 rears are cracking within the tread blocks.

I will be replacing them regardless but wanted to know what the largest OE size is before buying puny 175 tyres

[flash22]

You can play with tire sizes the wider you go, the lower profile the sidewall also you will be limited by the rim width (5J)

https://tiresize.com/comparison/

you could try a 185/55R16 but you need to check availability and price