Toyvo these are the 3 piece not the split. They have the main part of the wheel then a outer ring and a lock ring to hold outer ring in place. Both this style and the 2 piece widowmakers were available in 54 (according to shop manuael) no idea why they used both types. I proably will take the rest to a tire shop and have them break the bead if nothing else so thats a good suggestion. with only the outer ring left to the tire there is no support to hold the tire firm while trying to get outer ring off without bending it