This is my first post on this forum. This is a adapter for Fanatec Hub QR 52mm to 74 mm wheel. I also made 52mm to 70mm adapter, unfortunately I do not have 70mm wheel. So I cannot test the adapter. I found most of the adapters are 52 to 70mm, I found for 74mm wheel but shipping cost are way more than the adapter. Most of the adapter are made out of aluminum. I print it with PLA and 20mm thick. It seems quite strong, but not sure for long time. You can download it on this and this Links.