i wanted the cage as simple and light as possible, i also want to try and make it as sleeper as possible (no v bars in front window). main tube structure are 1 3/4 and the roof and back cross tubes are 1 1/2. got these 37s but will just use them for mock up so when i do decide to run 37s down the road i will be fine. till now ill get some fresh 35s as its closer to being done. back window will get a plexi glass. tore the beams down today and cut some cromo going to start the beams tomorrow.