... on a w124, the brake discs are held on by one allen bolt, with two "sleeves" 33 degrees away on each side. I assumed these sleeves were basically to correctly position the rotor, with the bolt holding it down, but I'm having an issue getting the rotors on evenly and I'm wondering if those are the culprits. The rotors are on crooked. When you turn one, it passes through the pads very easily on the area of the rotor beside the bolt. It gets completely stuck on the area opposite it ... both wheels (the passenger side to a much lesser degree). I confirmed this by checking runout ... the difference is a 1/20th of an inch on one side and a little less on the other. Technically this could be warped rotors (even though they're new), or a hub problem, but it seems more than coincidence that the part of the rotor that correctly passes through the pads is next to the bolt on both sides. I was going to take the rotors off and give the mating surfaces another clean to make sure it's not some dirt buildup making them crooked. Should I give any thought to the "clamping sleeves"? Do they actually help hold the rotor on evenly, or are they just for positioning?

__________________
1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)