Mild Tubz and 275/40/20s

[Sovereign]

Hi All,

I have an 86 C10 that I've lowered 4.5" in the front. I'm wanting to go with mild Slosh Tubz so I can have more suspension travel. Does anyone know if 275/40/20s will have any issues clearing the tubz? Rims are your typical 20x8 with 0 offset. I see most people have 245/40/20s for tires on the front. I bought the truck with these tires and rims and would really like to keep them as I prefer slightly thicker sidewalls.

While we're talking wheel size, anyone know what the widest rim and tire combo is with mild tubz should I decide to replace what I have in the future?

Thank you