The new foot for the new cz0834 Olympic powerstrider, flyjumper,air-trekker, projumps have no need for an aluminum foot plate making them lighter and more agile. All of these brands will be selling the new model within a few months as the old model is no longer made. As you can see by the picture the new foot bolts right to the spring just like the old aluminum foot but the rubber foot pad is built right into it making them easier and quicker to install. They are made of tougher rubber and should last longer depending on the user of course. You can also see them here http://www.allstilts.com/czo834rubberfeet at http://www.allstilts.com/ . If you haven't upgraded to the new cz0834 yet maybe its time parts for the old ones are running out quickly and soon will be obsolete. You can also see the new model of jumping stilts here http://www.allstilts.com/flyjumper-adult-jumping-stilts ,these are a great model and are becoming popular very quickly.