Looking for some different wheels for my 01' 4X4 Flareside.

Found some Harley wheels that are 20" with P275/60R20 's on them.

Any issue with fit on a 4x4? Anyone have pics? I don't want them to stick out too much as the current aftermarket wheels throw rocks over my rock tamers at my RV already.

 

They'll fit like the oem wheels did, tucked in.

 

Any idea how they will fill the wheel wells up?

Can't find any pics of them on a 4x4.

Also tow a small travel trailer in the summer. Can't imagine those wheels have any load capacity issues?

 

Besides tire diameter and load you have to consider offset. Be prepared to find you a alignment engineer, expert.
When you move to anything that sticks out further especially. You might see a bit of handling/ride improvement to the rear, but on front it is totally a crap shoot as to handling effect, even with the same offset if you change tire width.
Castor forces could be effected most.