Finding the i30 estate bit low on the standard 16" alloys Would it be worth putting 18" alloys to increase the height of the car? Would it negatively affect ride or mpg? How much would it cost?
Don't know about cost , but if you change the diameter of your wheels/tyres it will impact the accuracy of your speedo, so you'll need to go for lower profile tyres to keep the rolling radius the same , which will impact the ride quality.