Problem Solver Headtube Reducer Reduces 1.5" headtubes to 1-1/8" Threadless headset

Problem Solvers Headtube Adaptors Adds 9mm to headset stack height 20mm deep, 25mm overall height per cup. Measures 49.67 +/- .05 at insertion. This 49.67 measurement is the outer diameter at insertion (not the shoulder). Headset sold separately