Inspection, clean, and lube of Ztto M1 rear hub with 36t star ratchets. I installed this hub/carbon rim on a newly built 1Kw ebike. In hindsight I should have checked the degree of lubrication on the ratchets before beginning testing. At around 1,100km I got the impression that the ratchets were a little slow to release sometimes, so it was inspection time. Through out the testing the ratchets never slipped, only complaint is that they were a little loud. For good measure I ordered a fresh set of ratchets, a splined ring, and tool. Found all parts to be kind of dry, cleaned, re-lubed, and back on the bike. Below are some pics of the star ratchet with some visible wear at 1,100km, other one looked new.