i am new to this i was woundering i have a pair of 3yr old quater horse mules that are green broke they weigh about 700lbs each would like to now if pulling 2 old 18 wheeler tires only behind a forcart is to much for them to pull thanks for all the help

If they can't run away pulling a half dozen of them, I'd get rid of them.

I'll bet they'll be alright. I like how Dale put's it. He must have worked some mules somewhere along the line.
I have a pair of mules just like what you have. They are pulling 1300 lb. bales out of the stackyard for me. I did work them on a lighter job and they're hard though.
One thing I've heard is that you can work a mule too hard, too early. Most of mine don't hit the heavy pulling until they're four. But the load you describe shouldn't do much but make then want to understand that 'Whoa!' is a good thing. Really reinforce stopping and standing.

Two 18 wheeler tires is nothing to them at 3. Bet they run off with them.They are old enough to start.

Jack Stroude always used two front end loader tires.They are about 300 lbs each. I had two 3 year old halflinger mules trotting with them

thanks i hooked them to my wagon which is 3'wide & 8' long with 4 wheel braks with one tire behind it made a 5 mile trip with some long hills they are pretty calm mules but like jack said they will try u mabye not today but one day i just didnt wont to do to much to soon i apreciate all help i can get as i am learning also so thanks for help

Buy Jack Strode's Mule School DVD from Rural Heritage. Great tool to help you start.

you can train them alot at three just dont overdue it let them mature. i dont work mine to death till they are four

I've got his video and can't remember if he used the tires on the road or just gravel.