Birzman Bottom Bracket Tool Adapter

I recommend this product

Had a very tight Dura Ace size bottom bracket cup. The plastic style insert just shredded itself in the end despite trying very carefully to ease it loose. Got on of these and with the help of a breaker bar it came free. It didn’t even mark the BB shell which was good. As a bonus I can flip around and do the new Ultegra standard BB cups also. So if you already have an old style socket BB cup tool, this is a great addition to then be able to cover 3 different size standards.

I recommend this product

This adapter is perfect if you use a Hollowtech II BB tool designed for attachment to a 1/2 inch ratchet handle. It fits inside the standard tool to reduce the applicable diameter to the smaller Ultegra and DuraAce size BBs. The adapter is well made and fits perfectly.