Its basically a yoke. Kinda thing. It allows me to get 36t non boost ring with narrow q factor cranks and big tires.

 @Tsoxbhk: cool. Innovative use of a tube. I knew there would be a reason. As long as you solve the coating and grit collection issue. nice work

 @conv3rt: Thanks man. It will have a small relief at the bottom to let stuff out and will prob leave it open on the sides to save weight and make it easier to clean. It kinda doubles as a bridge as well. With this setup I should be able to get 650bx2.8s or 29x2.6. Which was not going to happen any other way.

 @Tsoxbhk: can’t wait to see it welded together