Today I install ABS bearing into the new wheels for Blue my 2009 Ultra Classic. Amazon part number Wheel Bearing Puller Kit for Harley Davidson - Removes and Installs 0.75", 1.0" and 25mm Sealed Motorcycle Wheel Bearings a.co/d/2ibLyL4
The expander tool was down to far past the barring, that pop you heard was the expanding tool snapping out when it reached the bearing. Your lucky you didn't destroy your hub or Spacer sleeve.