Set高啲roll center應該係較多車身滾動,而硬d anti roll bar係會traction啲先啱,roll center用以調教重心走向,而anti roll bar係用以防止車身過分扭動而失去抓地力,若然roll center太高,入彎時車身重心就會過分走向,即使硬一啲既roll bar使它還末失去抓地力,好多時都會over streeing,到出彎時亦因為重心未能及時回中而變得不穩定及遲緩,這就是set roll center既作用,相反roll bar好多時係減少扭曲同平衡兩邊車輪,越硬越traction,所以一般硬度就夠了