I took a look at your posted pic, thinking that my messurments were off, took apart the grill guard, put it back on with the brackets, and if you look closely you can see the gaps at the ends, something changed in the design somewhere along the line, i took a few messurements, so i could compare them to yours, i have one of the earlier tractors, made in fall of 06'. the o.d. size of the tractor frame is 9 1/8, the size with the grill guard and snowblower bracket o.d. is 10 3/4, 19 3/4 with the grill guard mounted with out the snowblower bracket. i'll take some pics also