90 toy whell specs

so i sold the s10 and just bought a toy. im getting 18s this week. the ones im looking at are 18x7.5. what are the exact specs i need to tuk the most while still being able to turn decent. no bags yet just lowered 2in. until this winter.

35mm- 40mm back space should be fine
that way u can bag it later and still be ok