Park Tool Steel Bottom Bracket Tool, BBT-179 Derailleur Parts 182247-Q0-L

182247-Q0-L

Manufacturer Part Number: C51328F10OS

Labeled Size: 20 x 1-3/4

167991-Q0-L

and GX X-Horizon rear derailleurs

Park Tool Steel Bottom Bracket Tool, BBT-179 Derailleur Parts 182247-Q0-LConstructed from precision machined 4140 steel the BBT 179 is a heavy duty tool for the removal and installation of select bicycle components with an 12 notch tool fitting Features an extra deep body to accommodate extra wide spindles and low profile walls at the point of engagement for recessed lockrings Fits 12 notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 4547mm and a minor diameter (inside of notches) of