Can anyone out there please explain to me why the '08 Sierra 3/4 ton isnt offered with 20" wheels. I only see 16" or 17" as an option. They look undersized to me on a truck that size. Ford Superduty's are offered w/ 20" wheels. What gives?

 

simply put,gm only puts wheel sizes on they feel comfortable that will be safe,smooth,and practical.