Gaither Tool says the patented tilting action of the Winntec Smart Tire Cart relieves stress for the user.
Gaither Tool Co. Inc. says the Winntec Smart Tire Cart (P/N G471147HD) holds 15-inch and higher rim diameter passenger tires up to truck size 245/70R19.5 and can move mounted tires and wheel sets and stacks of tires eight to 10 high.
The Smart Tire Cart stacks tires closer together than other carts for more storage space, and it is useful for loading and unloading trucks and containers, notes Gaither. A patented tilting action relieves stress for the user, and the new Push/Pull system pushes the tires out of the Smart Cart arms.
Source:
http://www.moderntiredealer.com/news/story/2014/04/gaither-smart-tire-cart-relieves-user-stress.aspx