About this 3D model

Hi, This is a rear wheel design for Scalextric; for a W8101 tyre set. I accidently bought the tyres for this wheel on ebay (had different wheels); so I decided to make this wheel to fit the tyres. Note: I thought the best way to get a good print was to split the wheel (as shown) into 2 STL files, and print the wheel in 2 parts. Then glue them together. I did not want to print this in one go, with supports etc.... Any thoughts on this ??