Changing from 17" to 15" - Toyota Yaris Forums

Neurotic Hapi Snak · 10-11-2013, 03:43 AM

A larger diameter means less revolutions per a given distance (effectively a higher gear ratio) but you run into fitment issues with larger diameters or they rub when turning or going over bumps. It's a good idea to stick close to the stock tire diameter. Also with offset, the lower the offset, the farther the tire "sticks out", too low and you will rub your fenders on bumps. Too high and the wheel might hit the suspension.

Revengeance · 10-11-2013, 09:12 AM

Quote:

Originally Posted by Neurotic Hapi Snak

A larger diameter means less revolutions per a given distance (effectively a higher gear ratio) but you run into fitment issues with larger diameters or they rub when turning or going over bumps. It's a good idea to stick close to the stock tire diameter. Also with offset, the lower the offset, the farther the tire "sticks out", too low and you will rub your fenders on bumps. Too high and the wheel might hit the suspension.

Thank you for the very informative advice!
I have 2 preferences atm

195/55r15 6.5j +28
185/55r15 5.5j +45

What do you think is good for my car? And do i also need to adjust the suspension?

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10-11-2013, 03:43 AM	#1
Neurotic Hapi Snak Drives: 2011 Yaris 3dr Join Date: May 2013 Location: MN Posts: 39	A larger diameter means less revolutions per a given distance (effectively a higher gear ratio) but you run into fitment issues with larger diameters or they rub when turning or going over bumps. It's a good idea to stick close to the stock tire diameter. Also with offset, the lower the offset, the farther the tire "sticks out", too low and you will rub your fenders on bumps. Too high and the wheel might hit the suspension.