8.5-20 10 holes 11.25"BC,8.718"pilot,1.25" c.sink .875 spherical radius to:1.46"dia. .500" formed disc. Welded in the reversed position. 20X8.50 V rim type 5o offset 4.75" from C/L to mounting surface of disc. Need price based on 20 foot container. We will need also 7.5-20 wheels. But need approval on 4 of the 8.5X20 wheels first before we can place an order for a container.