Got the wrong adapter stuck I believe? This is a Saris H3 and an Ultegra R8000 cassette. Did I f it up? Inhave lockring tool, but it can't fit in to loosen
How to remove and refit the cassette on your bike | Cyclingnews
Ask Pinkbike: Stubborn XX1 Cassette, Paying the Price of Progression, Knee Pads For AM and DH - Pinkbike