Mike,
I messured the mirrors today and they do extend 17" passed the door and if you extend them you get a full 20" of mirror extenstion.
I've got to wait about a month for my new set but I mounted the set I have now up and they have no vibration at all going down the road. The mirrors are just plain awesome as far as the increased amount of vision to the rear and sides of the truck.
DB
I messured the mirrors today and they do extend 17" passed the door and if you extend them you get a full 20" of mirror extenstion.

I've got to wait about a month for my new set but I mounted the set I have now up and they have no vibration at all going down the road. The mirrors are just plain awesome as far as the increased amount of vision to the rear and sides of the truck.
DB