A while back we were given a nice electric lawn mower. We like it but to tell the truth it was a little hard to push. Turns out the wheels all have plastic bearings. I looked to see if I still had any wheelchair bearings that would fit, I do not. Then I priced the bearings, $10 each bearing. That is not happening so I looked at new wheels. Much better. $10 for the complete wheel with real bearings for the front, a little higher for the larger rear wheels. I have replaced both front wheels and it made a noticeable difference. I will replace the rear over the winter one at a time so it does not cost so much at once. Now all I need to do is find a grass catcher for the little bugger.
Here are the front wheels I bought.
Here are the front wheels I bought.