Small wheel project.

[tom37]

Today while going on a call out, which was right across the street from a
garage sale. I found 2 21x11x8 lug tread tires for a 4 wheeler or mower.
At 15 bucks I grabbed them. The tires alone are well worth the 15 bucks.
My plan is to cut out and weld in a new center with the correct offset to fit
my zero turn mower. I plan to use the old bolt holes to help line up the
new plate, When finished welding the back side I can trim out enough of
the old bolt pattern to allow room for access to the new lug nuts.
First is the tires and wheels of course.
Second is the wheel center close up.
And third is the new center set in the wheel for the pic, not squared or
centered yet by any means.

I plan to tack it well, then I am not sure which is better. If I should make
four 2" welds spaced evenly, or if it should be welded all the way around?
My first thought was that it did not need the full weld, but thats why I am
asking for thoughts. We have a scale breaking top speed of 6 mph but I
would still rather not have it fail.

My plate is 1/4" with not more then 1/8" fit-up gap. I won't know the wheel
thickness until i get the tire off tomorrow afternoon but I cant imagine it
being more then 3/16".

I figured I would use .030 with my 211 using c-25.

My last question would be, should the welds be at the lug holes or
between them? I'm probably over thinking this but I would like to do it once
right and not mess with it ever again.

Just in case anyone wonders, the only reason I am messing with this is so
I can have a tire and wheel for those nice afternoons when I'm almost
done mowing and manage to loose a tire.