Long Term Storage There are 2 products.

Race Ramps FlatStoppers® were developed to prevent tires from developing flat spots when parked for 30 or more days.  Lightweight construction, won't slide or scoot on any surface, and never scratches or marks your floors. FlatStoppers are 100% solid, made with a high-density expanded polystyrene that is coated with a hybrid polyurea. This patented process results in a product that is extremely lightweight, yet strong and durable. In FlatStoppers, a lighter formula is used so the pad will mold to the shape of your tire over time to provide even greater support. 

Available in three sizes. Sold in sets of four.

Supports 1,500lbs per tire or up to 6,000lb vehicle.