It has a strap instead of a clamp. A spacer is included in case your tube isn't wide enough. It was so close in quality to XT that Shimano decided to discontinue it. This is a beautiful derailluer. They are made by Shimano, so the space is perfect for SIS and Hyperglide.
Some rimes are available with hard ano.
We can provide a Sovos sealed bearing bolt on hub upon request. These are the best hand made wheels you can buy. If you want to build your own wheel we can provide the exact size spokes you need. Our spokes are made from stainless steel. Below is our fee schedule.