Adjustable cup bottom brackets aren't common on new bikes, but they're still out there on vintage frames, beater commuters, and plenty of older steel bikes that refuse to die. When those cups need adjustment or removal, a standard fixed-size wrench won't cut it because cup sizes vary between manufacturers. The Park Tool HCW-11 solves this with an adjustable hook design that spans 50 to 64mm diameter cups, covering the range you'll encounter on most adjustable cup bottom brackets regardless of who made them.

The wrench works by hooking into the notches machined into the cup's outer edge. You adjust the hook position to match your specific cup diameter, then use the wrench to thread the cup in or out of the frame's bottom bracket shell. The 264mm handle length provides enough leverage to break loose cups that have been in place for years without resorting to hammers or pipe extensions that risk damaging the cup or shell.

This tool handles both installation and removal duties. When installing, it lets you set the cup position precisely to eliminate play without over-tightening to the point where the spindle binds. When removing, the secure hook engagement means you can apply real force to cups that corrosion has seized in place. The adjustable design also means you're not buying multiple fixed wrenches hoping one matches your particular bottom bracket.... Read More