so i have zwift core 2 with cog and trying to fit my old 130mm bike so i purchase 130mm/135 from shop and some how thread size not match what am i missing
Hi @Jong_Chae welcome to Zwift forums.
Shuji at Zwift HQ here. Are you certain the shop ordered the correct adapters? These are brand-specific, sometimes model-specific parts.
Wahoo’s setup instructions for the KICKR Core 2 has this diagram, which looks different from your photo.
You may want to contact Wahoo Support to ask them if these are the correct axle adapters.