This adaptor allows the use of VO Grand Cru Cigne Stems on 1" threaded steerers. The clamp area is 55mm tall and serrated for a secure fit. We'd suggest picking up a pair of 1" 5mm headset spacers to match your Cigne Stem and headset, otherwise you'll have a gap between the bottom of the stem and the top of the locknut.

Slip the spacers (not included) on the adaptor, install the adaptor in your bike's steerer, attach your Cigne Stem, and install your handlebar.