this is an example of a set of 16" ESN's on the bimmerfourms.com in silver...
they do fill the wheel wells...many believe these are the largest wheels the typical e21 can pull off cosmetically...not to mention the difficulty a 4 cyl. engine has with 17" wheels... these pictures help me "get it" i see the wheel wells here are full...i assume? rolled...hott wheels either way...