Stages SC2 Pop Pin Height Adjustment Assembly (000-7723)Stages SC2 Pop Pin Height Adjustment Assembly (000 7723) Genuine Stages Pop Pin Height Adjustment Assembly (Part #000 7723) designed for the Stages SC2 indoor cycle. This assembly controls both seat height and handlebar height adjustment mechanisms. Model Compatibility Standard height adjustment system on Stages SC2 Controls both seat height and handlebar height Compatible with Stages SC3 as a conversion upgrade from FitLoc Not compatible with SC1