to remove the abs rings from the rear discs on a 02 172.The reason i'm asking is that i want to change my discs alround for grooved ones but i cant find any with abs rings apart from k-tec.Renault turned thier noses up when i asked them.(which wasn't nice as i work for a renault dealer)Also can any body point me in the right direction for grooved discs at a resonable price.