| 摘要 |
A tri platform control device on which a rider stands on to either ski or skate. The device includes a front vertical platform, two lateral platforms with footpads attached. Attached to the footpads are either wheels or skis. The vertical platform has a steering shaft fitting allowing the front ski to turn and collapse in case of a sudden impact, giving a safer ride. A spring loaded hub device attaches the lateral platforms to the vertical platform. This device adjusts the vertical platform. It is also used to fold the platforms up. The spring and hub assemblies on the vertical platform allow the parallel skis to lean from side to side. This device also allows the rider to lift the front ski off the ground to avoid obstacles. The footpad enables riders to push either the toe or heal down for better performance. An additional version has adjustable lateral platforms.
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