one of front castors broke off on my mig cart welding cart wheels - i've had it for several years, and was moving it across the shop - and one of the wheels broke off!!

so, off to HF for replacement, and the wheels are 3" - i got the "Red" ones, as the mounting plate is smaller than the blue ones .. the hardware is 10mm

i got the red ones, which has a larger (wider) plate, so i mounted 2 holes, dilled 2 more (1/4" is fine), bolted together --

then removed the other wheel, was was about to fall apart as well, both would have broken at the "rivet" attaching the wheel ...

10 bucks, 15-20 minutes to dismount/reattach, and a quick chore off my list