How to choose safe Kia K5 wheel spacers? Some Kia K5 owners only intend to push their wheels out a bit for the ultimate fitment, a smaller spacer such as a 15mm may be sufficient, others may need a 1-inch or even 2-inch aero spacer for completing the look of a widebody K5. If you have added those sexy aftermarket wheels, make sure you have spacers of the proper thickness to correct the wrong offset. If you had clearance issues at the brake, then the thickness depends on the increased height of the caliper. If it is the rim ET/offset issues, then the thickness depends on the change amount, for example, your stock wheels’ ET is 50, you would like to install an ET 65 wheel, then you need 15mm thick spacers to correct the wrong offset.