Turbo, the s'blower will not scrape down to the concrete in any event. It does a great job of moving snow and clearing the drive out, but it will not scrape. The slightly wider stance of the tires has NO effect on the blower, IMHO. I too was worried about this when I got my tractor, but it has proved to be a non-issue. My job is to get the snow off of that drive to make it passable and clear for vehicles. The blower does a great job of this.
The BACK BLADE does a very good job of scraping the drive surface and does thereby greatly lessen ice formation. The blade will scrape your tire track impressions, too. I use a suitcase weight on each side of the blade for more weight/down pressure. The weights are tied on to keep them from bouncing off and/or moving around when I am working or ....
I am on the Manistee County shoreline and last Dec. I sometimes had to blow every four hours to keep the drive (900 ft. long) clear. The blower does a GREAT job. Those that plowed ONLY had real trouble after a few of those good storms as there was NO WHERE to push the snow!!