(ET) Well I have a flat

[Christopher Zach <cz alembic crystel com>]

I guess it had to happen; one of the sidewalls on my E20's rear tire 
finally gave out. So I need to replace the rear tires after 40 years or so.

Sigh.

Now, where do I get tires for this thing, what's the closest ones to the 
factory tires for stuff like tilling/snowblowing/not turning my yard 
into packed clay? What should I expect to have them mounted, and is it 
possible to remove the tires myself?

Chris