On my way to work this a.m., I was backpedaling/skipping down a steep hill and felt a "slip". I will always know that feeling from now on, at first I thought it was my pedal. I stopped (brake) and when I started again I could feel the cog re-tighten.

I bought the wheel (lower quality hub), cog and DA lockring a few months ago and the tech at the LBS installed and tightened everything. I don't have the tools to re-tighten, but I think it's time to make that purchase.

My question is, could the lockring have just loosened, or is the hub certainly stripped, or is there no way to tell without taking everything off?

Thanks again from a newb...