I’ve made a little error and I’m wondering if it needs to be rectified. My 2017 Ex had 20” wheels with summer tires and I’ve ended up buying 245/60/18 tires to work with the 18” police interceptor steel wheels. The difference in diameter is -1.3%. Of course I’ve just realised that I should have bought 235/65/18 and the difference would have been 0%. Is it a big deal? I’m pretty annoyed at myself.....