FSA Vision ACR Spacer

No, these are specifically designed for the FSA ACR (Aerodynamic Cable Routing) system. Because they are precision-molded to match specific frame geometries, they are not universal and will only fit bikes engineered for the ACR standard.

These spacers are strictly for integrated cockpits where cables run through the headset. They will not work with a standard stem setup because they lack the necessary cable channels and specific interface shapes required for traditional stems.

In most cases, yes. Because the cables run internally through the spacers, changing the stack height usually requires disconnecting the brake and shift lines to add or remove length, which often necessitates new housing or hydraulic lines.

You should check your bike manufacturer's technical manual or the FSA compatibility chart. Since these spacers are model-specific to ensure a flush, aerodynamic fit against your head tube, using the wrong shape will result in a poor aesthetic and potential structural gaps.

It is strongly recommended to use only FSA ACR-compatible spacers. Mixing brands can disrupt the cable routing channels and compromise the aerodynamic profile, potentially leading to cable binding or an uneven fit against the stem.