APB T21 前叉浮動避震

由上到下分別為：1空車、2有人乘坐、3用力壓下(未達死點) 狀態.

一直很疑惑APB的前叉那麼軟是不是正常狀況，一坐上去就沈下去1cm左右。
在一份Cycling Plus July 1997的測試報告中找到答案，關於comfort的一段是這樣寫的：
Compared to earlier APB modules a softer front suspension spring is now used. the T21 floats along in the middle of its suspension travel instead of sitting on top of its fornt spring. This is a real delight on the variable sufaces of minor roads and certainly takes the sting out of off-road tracks. The suspension also allows higher pressure tyes to be used in comfort, hence the 20x1.25in 100psi tyes fitted.
大意是說，T21比起早期的APB，採用較軟的彈簧；讓騎乘時"浮"在避震行程的中間。如此一來可造就優異的吸震特性。裝配高壓胎也同時保有舒適性。