The 39mm end is the right size for XTR BB93 (as well as DuraAce 9000 and some Token BB's) external bottom brackets

due to chemical burns and potential perforation of the esophagus

Flat Rate Cable Pull: Linear actuation

2mm Phillips head bit

Installation: One of the cups will need to be pressed into the BB shell and then the other cup will thread into it to lock it in place

Ass Savers Brookshield Rear Mudguard Back in Stock The 39mm end is theMeet BrookShield, the mudguard of your dreams. With a superb fit and extended reach, it sits perfectly on your Brooks saddle. Not only does it save your ass from the wet stripe, it also function as a protector of the leather saddle which otherwise can easily be destroyed by the notorious road spray from your back wheel. Although developed especially for BROOKS saddles, it also provides a good fit for other similar "old style" leather saddles such as