20" rims question

[JAWKNEEBEE]

I have 20" rims on my stock 03 Tahoe ... I'm wondering what would be the biggest tires I could get on it with out it rubbing right now I have a 285 x 50 r20 but would like to go to a 60 or 70 ...

 

[ID_Escalade]

I am running 275/55R20 and they don't rub.

 

[BigDaddy13440]

275/60/20's on stock wheels should clear w/o anything more than a couple turns of your stock t-bars.

I have 275/65's going on stock 20x8.5's, but with 3" keys. Hopefully they don't rub when cranked and in reverse.