I bought a Raleigh Rush Hour at the local zoo (better known as Cardinal Bicycles, https://www.yelp.com/biz/cardinal-bicycle-shop-palo-alto). I should have checked on reviews, but didn't research until today, when it was too late. I had taken my bike there to have them tighten the cog and lock ring, and they did for $5. (I would have done this myself but I didn't have a chain-whip tool or a lock-ring tool.)

Recently, during my ride, the rear felt like it was slipping, so I decided to invest in a chain-whip and a lock-ring tool and do the job myself. With tools in hand, I went at it and discovered that the cog and lock ring were already tightened. So I wanted to investigate why the rear was slipping, so I took the ring and cog off. What I discovered was the cog was wrenched onto the hub while it was off-track with the threading. There was practically no threading left, nearly machined with slivers of metal shavings sticking up. Dis-f**king-gusting. Someone had wrenched the cog on with gorilla arms while it was off-track, and there was also no grease!

The moral of the story: Buy your own tools and do your own wrenching! Not all mechanics are skilled, and some of them have monkey brains and gorilla arms.

So are you 100% certain that this was caused by your LBS and not by your riding style?

Its a bit suspect that the one thing he paid his LBS to do is the part that fails. leads me to side with the OP about them cross-threading the hub.
Take it back and have them fix it, even if you're jumping curbs or skidding everywhere that cog shouldn't strip the threads unless it was installed incorrectly.

how are they gonna just fix your hub without giving you a new hub or wheel?

good luck with dealing with them. they're probably gonna deny it and you'll probably have to get in some huge argument..

Brutal.
Next time ask to borrow tools. Most places don't mind. Especially if you go often enough.

lol! borrow tools huh?

110% sure. It was a brand new, two-day-old wheelset on which the cog and lock ring were installed and tightened by the shop. I didn't jump curbs and I haven't skidded on these new wheels. Even though I accelerate pretty hard, no way can the torque I produce during my commute strip the hub thread raw like this, with slivers of metal shavings all over.

nitpick of the year award, but local LBS is redundant, for your FYI.

Working on things yourself can produce a great feeling of accomplishment. I'd hate to point any fingers at anybody's LBS, but sounds like they are at fault. A bummer, because all that can come of it is rude service when you gotta run in for a tube. I have designed a great, cheap cog/lockring tool. Try it out.

I completely stripped the threads on a Fuji Track during a test ride in a parking lot. No skidz. Maybe your LBS is not to blame.

Yeah, you bring your bike down and ask to borrow a chain whip. If you're a regular customer they shouldn't mind.

+1. And typing Local BS has a whole different meaning.

The cog must have been installed incorrectly for you to strip the threads on a single test ride.

The reviews from the link you provided give you indication that they suck at service and repair. I would be taking it in for a arguement at least.. because I doubt they will fix the problem.

This is why I bought my own tools as well. Such a simple repair and they mess it up.

nitpick?

This is equivalent of having a car wheel fly off on the highway because some kid cross threaded the lugnuts!

the nitpick was with writing "local LBS" not the cog stripping off his hub. nobody would disagree that this is a completely bogus situation. FWIW it is really hard for a wheel to fall off a car lug nuts stripped or not. try removing a few and see how far you can get before it actually comes off. ok dont try it, but not a real good analogy on your part, sorry. hey we can have a chuckle once in a while!

[EDIT]
ok, yes, your wheel would fall off if you broke them all off... lets just not cross thread ***** okay kids?

Not hard at all...eh?

https://www.youtube.com/watch?v=jv4m41viy4I

y'know, the Y in FYI stands for YOUR. so, yeah, pot calling the kettle redundant...FYI

LOL that was the ENTIRE POINT OF THE JOKE. gosh you're dense.

ahhhhhhhhhh. i am not even getting into semantics. i am wrong! and i am an idiot. when i worked at a honda dealer in highschool i definitely saw a number of kids driving on 3/4 or 3/5 nuts, but like i said, not getting into it point taken. i go now.

sounds like a "ruin your day" moment

laughing out loud LOL

how does jumping curbs and skidding cross thread a correctly installed and tightened cog? what kind of crazy curbs do you have in your city?

I was just waiting for someone to miss it and call you out... and it was worth the wait!!!

Exactly. Besides, I wasn't even jumping curbs or skidding. Simply put, the Neanderthals installed and tightened the cog incorrectly, because it was slipping within a couple days of riding.