I’ve used several different styles of garden carts and wheelbarrows over several decades. The brown plywood Vermont Garden Cart style (the wood finally rotted) was superseded by a brown poly 7.5 cubic foot Rubbermaid, fine except when my father or his day-laborer overloaded it and broke the flimsy 20" wheels (time after time) or the tub itself. Amazon has good replacement wheels that come with 2 different inner diameter bearings but would benefit from additional grease (keep reading). Go ahead and replace both stock wheels at the same time.
We then augmented with an aluminum folding garden cart (think of the Vermont, but from lightweight metal). A local garden guru had written about how great this style was, but the tailgate is not so easy to use and this one just sits around for light duty weed collection.
Shortly after that the local Aldi had their black plastic garden cart in-stock, and my mother purchased one for herself and one for us (I’ll post pictures of all of these later). This was reasonably good. Lightweight enough that I could hoist it easily to dump, but not too flimsy. The wheels were smaller diameter, so it is better on ground that isn’t too bumpy.
I wanted something that would be top-notch, so I did a lot of research. 10 years ago there was a product that was great, but quality went downhill. If you have one, never let it go (I’ll post the name when I recall it). After a bunch of research I settled on a Gorilla brand 10 cubic foot cart. Tractor Supply had them, so I bought one, immediately found that they had dropped the box and bent the frame and how little force it took to open it back up to accommodate the tub. It mostly sat over the last year, but I recently pulled it out and discovered that the bearings in the wheels had completely rusted. I removed them, took some (larger ID) extra bearings from the Marathon replacement wheels for the Rubbermaid, pried out the seals on both sides, packed them full of Cotton Picker #00 Spindle Grease flowable grease (TSC for the win) and pressed them into the stock wheels. Apart from that and the tub seemingly scratching really easily it seems fine, but again, I have barely used it.
I’ve gotten 2 of the black poly Rubbermaid carts for free. Keep an eye on the Jersey Barrier median of the highway, you’ll find them there when they blow out of trailers or truck beds. Their stock wheels are equally weak, replacement is easy but they do benefit from an extra washer or two to take up some slop in the axle length. If the tub has any crack in it, drill a hole where it terminates to keep it from propagating and screw pressure treated plywood or 2x dimensional lumber to it to strengthen the area.
Wheelbarrows: all are junk, simply to varying degrees. Wooden handles rot or break, plastic grips come off of metal handles, plastic tubs crack, pneumatic tires bounce well to help you hop over obstacles but the never-flat wheels won’t leave you stranded with a flat tire, double wheel models are easier to balance but you can’t cross slopes sideways with any load, and every single one has to be loaded (except when dealing with ginormous pumpkins) with them standing upright, requiring more lifting labor during the loading process.
My favorite of ones on the market which I have already used would be the Rubbermaid.
Pics to follow.