There are two common types of wheel bolts. The first is tapered and the second is radiused. These words describe the base of the bolt head where it meets the threaded shank of the bolt. The word tapered is fairly self explanatory. The standard wheel bolt on the Leon is the radiused type. Have a look at a standard wheel bolt and you will see that the base of the bolt head is rounded (radiused) as opposed to tapered. If you have a look into the holes on the wheel where the bolts go it should be obvious which type you require.