julio 26, 2026Publicado Por En julio 26, 2026Potts Mod hollow old school BMX quill stem bolt with 21.1mm stepped wedge forOld school BMX Potts Mod hollow stem bolt for Tuf Neck or Pro Neck stems. It is unlikely this will work with any other stepped wedge stem. We have tested this on both 4" and 4 1/2" quills and it works.
