Tyres- 245 or 225 on 18" alloys.

[marta96]

Hi folks,

Had my a4 2 years and I've always had 245 width tyres on the car and though they look great and give the boring estate a meaner look they're also more expensive. I do mostly dual-carriageways and long sweeping B roads, so demands for better performance and hard breaking isn't as important as longevity and cost.

 

245/40 18 is what I have now, so could i stick 225/40 on the car or is it necessary to go up on the profile?

 

Conflicting information on the internet with some claiming it's fine and others saying increasing profile is a must. I have no clue what the J factor is of my alloys (8j maybe), all I know is they're twin 5 spokes, picture for reference. Thinking of cross climates, lots of miles per year in every weather condition.