Hello, I'm suspecting my cog and lockring may be loose because the other day while "attempting" to skid, the cog slipped. Anyway I plan to fix this myself, can I just use any lockring wrench? the one I looked at was the park tool lockring wrench.




http://www.parktool.com/products/det...&item=BBT%2D7#

One thing I noticed with this wrench is that it has 5 teeths(?) and the lockring on my bike only has 4.

Will it work? can anyone point me into the right tool to buy? I have a '07 rush hour.

OR

should I just bring it to my LBS and have them tighten everything? the bike is barely 1 month old.

Thanks.