Axles on lower rack broken

Very, very simple. The axles are nylon plastic and snap into the plastic-coated metal grid that forms the lower dishwasher rack. Over time they get brittle and break.
Replacement consists of snapping the old axle out of the rack and snapping the new one in. I replaced some of the wheels at the same time, as we had lost them. The wheels don't seem to wear out, so if you did this repair in time, you could re-use the wheels.
These little axles are EXPENSIVE ($3.50 each!), but for $30 you can replace all eight of them, and your dishwasher rack will work like new again!