Newbie Rim Question

[Laddy]

How do you know what size tire you need for 20s and if I get 20s do I have to get new brakes or is all I need the rims and tires?


Also they aren't going on the explorer, My mom is giving me her '01 Yukon

 

[FROADER]

For a Yukon, get some 285/50/20. That looks good. It would be good to get a brake upgrade but will be ok with out it. post pics when you're done.