It's frustrating right

Lubricates moving parts extremely well

You can determine what hub you have by checking the end caps

By threading in to your crank

There is nothing worse than having your day ruined by getting a puncture on your favorite trail

Shimano SLX SM-CRM75 Shimano Direct Mount Chainring - Shimano Direct Mount - Round - Black - Grey - 34T Images Uploaded - Ready for Review It's frustrating rightThe SLX SM CRM75 chain ring uses the same direct mount system as XTR and also features Dynamic Chain Engagement. With a narrow wide tooth profile, it provides excellent chain retention and less chain vibration even on bumpy trails. Who's this item for: Designed for all riders using Shimano 12 speed direct mount cranks and Shimano 12 speed chains. Number of teeth: It is available in 30T 34T options. Mounting style: Mounts using Shimano's Direct mount