What do you use to haul your compost? For years and years I only had a wheel barrow, which worked OK, but you got a hard workout with heavy loads. The tire finally rotted out on that wheelbarrow and I needed to replace it. I took that opportunity to replace the wheelbarrow with a 4 wheeled gorilla-type cart. It holds much more compost, dirt, etc... and it is so much easier to move around even when fully loaded. My cart handle also converts to a hitch so I can hook it up to my riding mower. Even better!
I actually got a YardWorks Poly Dump Cart from on sale from Menards,. It holds 1,100 lbs., but I don't think I've ever had anything that heavy in the cart. Even full of dirt, I don't think it comes close to the weight limit.
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I think this particular 6 cu. ft. cart has been discontinued from Menards. I bought it a couple of years ago for about $120.00, which was a lot more than a 6 cu. ft. $60.00 wheelbarrow, but it was worth the extra cost to me. I can get so much more work done with less fatigue with the poly dump cart. Now that I am 60+ years old, those considerations are more important to me. Also, Dear Wife is a small woman at 5 foot nothing and has no problem loading up this dump cart with 5 bags of her colored wood chip mulch and hauling it to her flower gardens. I don't think she could handle 1 bag of mulch in the old wheelbarrow.
Having said that, earlier this year I did buy a hardware replacement kit with wheel at Menards for my old wheelbarrow for less than $20.00. So my old wheelbarrow is now back in service but I so far have only used it with my compost sifter to catch the unfinished/large pieces of compost that get sifted out. I don't use the wheelbarrow to transfer heavy loads anymore. My poly dump cart is used for almost everything.
I have a gorilla cart that looks almost identical to yours. I bought mine for $100 from Atwoods last summer. I love it and use it all the time.... Mine has a flip down handle so I can pin it to a hitch but we haven't needed to do that. I just loop the handle over the ball hitch on the 4 wheeler and it stays on just fine.