I was under the impression that the reason most people went with 10mm spacers on the front and 15mm spacers on the rear was because the front wheels were already 5mm wider then the rears as standard. Is this true? The reason I ask is because I used to have 10\15 spacers on my stock ET32 S3 wheels but I was just following the crowd. I sold these a while back to Dane and have only now started to look at getting some more for my stock ET32 TT wheels as they look pony tucked inside the arches. I was looking at getting 15\15 until I remembered that the fronts are supposedly 5mm wider already but If someone can confirm this as a myth I'll get 15\15 instead of 10\15. Cheers.