Definition
Twin-tipped skis have pointed tips at both ends and are designed to provide equal control whether the rider is going forwards or backwards. Traditional skis have a pointed tip at the front end and are square (flared) at the back end.
Uses: Tricks
Twin-tipped skis are commonly used by intermediate to advanced level skiers who are looking for maximum performance when tackling all terrain parks or performing tricks. These skis tend to be shorter and very symmetrical in the design.
Uses: All Terrain
Twin-tipped skis also perform well for skiers of all levels who are looking for a nice, controlled all-terrain ride. The main benefits of all-terrain or (all-mountain) twin tips are superior turning ability in the moguls and more float when tackling the fresh powder. All-mountain twin tips tend to have greater side cuts and to be longer than those designed for tricks.
Performance
Aside from the obvious advantage of being able to ski forward or backward with equal control, twin tips have other advantages. The greater sidecut of twin tips vs. traditional skis means that less of the ski is in contact with the snow. This reduces drag and makes turning much easier.
Designs
Because of their more aggressive nature, twin-tipped skis tend to have cleverly designed graphics. These especially appeal to younger skiers as they are similar to the designs found on many snowboards.
Availability
Every major ski manufacturer offers twin-tipped skis designed for all uses and ability levels. As of 2009, prices for twin-tipped skis start around $270 and move upward.