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

This is a standalone adaptor to do just that

Genuine Innovations Tubeless Repair Kit is a super-easy way to fix a flat

The RockShox Reverb Lever Service Kit includes all the parts needed to ensure your Reverb is running perfectly

If you use your regular cutters

Park HHP-3 Home Mechanic Bearing Cup Press Tool netsuite-webdata-created The 39mm end is theThe Park Home Mechanic Bearing Cup Press is a simple design, yet very well made press for the home mechanic. As you would come to expect from Park Tool, the Home Mechanic Bearing Press is made from quality tool steel, is all welded and comes with a lifetime warranty. Suitable for pressing in1 8"", 1 1 4"", 1. 5"" headset cups and BB30, BB90, BB86 and BB92 system cups or even BMX bottom brackets. Perfect for assembling your custom build in your garage