This bead depressor pushes the bead down into the center of the wheel which helps mounting and demounting tires (especially with low profile side walls and run flats)
It is very durable because it is made nylon polymer which hold up to some abuse yet will not mar or damage wheels
The plunger on this tool is spring loaded so once installed will stay in place while mounting the tire. This tool is as efficient as having another person prying down on the opposite side of the bead while you mount the tire on the tire changers mount head
Its a huge time saver and can prevent tire bead and wheel damage from over stress. Note sometimes 2 of these may be required on some stiff wall tires
