同步傾仰機構，椅背和坐墊傾仰比例為2:1，符合人體工學，只有在坐墊靜止時可剎車，最大傾仰角度21度。

Synchronized mechanism, backrest and seat tilt at a 2:1 ratio, ergonomic design, maximum tilt angle is 21°, locking function is only available when the seat is fixed.