I was out riding this evening and was practicing skidding down a steep hill from my house. I usually brake the whole way down this on my way to work, but wanted to try skidding since I'm not too great at it. After maybe 20 minutes of doing this back and forth for practice I'm hearing a clicking noise when I ride on flat road.
Normal? Everything feels ok, just a click that wasn't there before.

EDIT: The bike is clicking, not my knees

i heard skidding can be hard on your knees. have you checked your knees? maybe you should see a doctor.

where is it coming from? can you pinpoint the noise? does it happen only when riding? or will it happen if you turn your bike over and give it a spin?

It's definitly coming from the rear wheel. Isn't as loud when the bike is over and I give it a spin but it's there. Something maybe with the rear cog? I have no clue

chain look okay? check your lock ring... still tight? pull your chain.... any tooth damage on your rear cog? (looks like a sharkfin) also give it a spin off chain...

if you are sure it is you rear ignore this... but a loose chainring will cause a clicking noise... check your bolts...

Most likely your lock ring is the source of the problem. If you keep hearing more clicking or feel sudden jolts while you skid, its definitely your lockring. It's coming off, shredding your threads on your rear axel. Definitely take it to a shop right away and stop skidding before you're left with two threads to work with on your rear axel... like me.

could be a loose spoke too..

tousche.

it's probably your chain. going back and forth snaps the slack one way or the other.

this is happening when she rides on a flat road... so there technically should be no back and forth...

Chain seems ok, there is slight slack but barely noticable. Cog seems ok...but I was worried that the it might be the lockring.

EDIT: A couple months ago I went to someones house to change my rear cog to a different size. What ended up happening was we couldnt get the original cog off at all. The guy that was switching the cog out was worried he was going to strip my threads so we just left it on (happy now that I didnt switch it out), but Im wondering if maybe it did strip a little, is this possible? I wasn't skidding at that point which I am a lot more now. Don't know if this is the reason.

I had the same problem and it was one of my chainring bolts. It might not hurt to check them to make sure they are tight.

check your rear tire. I know it sounds funny, but just yesterday I kept hearing a weird clicking noise from my rear tire after skidding a bunch and it turned out to be sharp-ish pebbles jammed into the rubber. every time they'd rotate around..clickclick. just scraped them off.

ha thats kinda funny, Ill see if thats the case. I have a feeling it's got something to do with cog/lockring/hubs,..I seriously hope it's a simple case of pebbles in my tire lol
You're from Seattle aswell?

yup. I ride around the u-district almost every day cause i'm a student, so if you see a dude on a bronze-ish converted fuji, holler. all I can say is if it's NOT the pebbles, go and get it looked at in the shop soon!

Well since its just clicking noises and no jolting motions or anything, shouldn't be your lockring. If your lockring is coming loose or stripping threads off your axel, then you'd feel a couple of big jolts before you go freewheel. Clicking noises would probably come from your chain/cog or hub.

christ. there are so many udistrict kids here.

i second what someone said above... when you skid your tire tends to pick up whatever's on the road, and if it's sharp enough it'll embed into your tire... hopefully it's small pieces of granite that you can just rub off w/ your hand.

She hears it when she's got the bike turned over, so it can't be her tire. Chainring bolts and loose spoke seem to be more likely.

My most recent experience with clicking noises turned out to be improperly tensioned spokes. Earlier, I had checked everything else I could think of (chain, chainring, chainring bolts, cog, lockring, bb, cranks) and it all looked fine. I brought it into the shop, and to my surprise, they said it was the spokes on my rear wheel.