Slipping cranks, drive chain slip?

http://www.lfgss.com/search.php?searchid=815057

http://www.lfgss.com/thread6549.html?highlight=slipping+cog
http://www.lfgss.com/thread5730.html?highlight=slipping+cog

http://www.lfgss.com/search.php?searchid=815057

http://www.lfgss.com/thread6549.html?highlight=slipping+cog
http://www.lfgss.com/thread5730.html?highlight=slipping+cog

Cheers, appreciate your facepalm and all...
As i explained i've had the Cog/lockiring tightened twice already?

Slack chain?

Could be on to something, my chain was well tensioned when i came out the shop.
Seems to be slightly slack now, and the axle bolts are really tight.

Could it be chain wear? chains only had about 6-7 months of light use though

Every time there is one of these threads it turns out to be a cog slipping problem. Yours may be the exception, it's possible but unlikely. Take off lock ring and cog, check threads yourself.

Otherwise check chainrings bolts, crank bolts, feel for b.b play and roughness, feel for cone play on the hub check your track nuts are tight, all after you've check the hub threads,

Every time there is one of these threads it turns out to be a cog slipping problem. Yours may be the exception, it's possible but unlikely. Take off lock ring and cog, check threads yourself.

Otherwise check chainrings bolts, crank bolts, feel for b.b play and roughness, feel for cone play on the hub check your track nuts are tight, all after you've check the hub threads,

Cheers for your help tommy,

will do once i get access to the tools!
Wasn't gonna start a new thread, but as you said all the other slipping threads appeared to be about loose lockrings/cogs

Best advice I ever got was ride up a fairly steep hill steadily on a new cog. This will bed it reet in - then tighten your lockring again. I've done that one every track hub I've ridden for the past few years and never had a hub strip.

Or rotafix and really tighten that lockring. If it's a cheap stock one dont mash it.

Im having a similar issue. Just put on a new chain and rear sprocket, sometimes when locking up the back wheel or putting down a lot of power the chain seems to slip. I cant seem to figure out why though. My locking is tight as is my chain. Is there any chance the sprocket could still be slipping?

if you didnt tighten the sprocket before putting the lockring on you'll still get slipping

I did tighten the sprocket, but perhaps not enough (only got a really crap chainwhip). Ill try and tighten it some more and see if that solves the problem.

Go outside, cycle up a steep hill and then tighten the lockring.

^this
just put some power through it then retighten the lockring. Or if you're careful you could rotafix it.

did you grease your sprocket/hub threads before tightening?

greasing them may help if you didnt before.

Sometimes it's sprocket/lockring combination. Try a spacer between them to make sure they're snug.

Saying that, I have the same problem with Miche lockring. I gave my spacers away :-/

You have to be careful, I managed to stripped the threading on my hubs after my lockring failed.

This was happening to me on a new build recently after I thought I'd done everything up tight, ridden it and tightened it again. It turned out the lockring was bottoming out before tightening up fully on the cog, allowing for a bit of slip when accelerating/braking. A 1mm spacer sorted it out nicely and it's now happy days. I have a spare one if you need it.

@scoble I am a little worried that it could have done some damage, still seems ok though.
Ill go out for another spin today and if its still happening then Ill try getting hold of some spacers.
@Gav Thanks for the offer but Im in Aus now so getting it off you could be a bit tricky

I have the same problem, anyone else have a spare spacer?

sorry to dig up old threads. but yesterday took my new bike for a spin, first time brakless on the road,

on my way out, i stopped at edwardes cycles in camberwell to get a new lockringring fitted, rode up east, and sure enough some knob walked out in front of me at liverpool street. i tried to stop quickly and the lockring and sprocket slipped. (scared the shit outta me)

popped to blb as i was just round the corner, who tightened it and said the threads were fine but it had no grease on the lockring. I'm just a little scared about trying it again and wondering if i had one of these 'suicide hubs' or if it was just because of the lack of grease.

its the old style dura ace high flange like this

any help appreciated on this - id rather not find out the hard way on this one.

does it have a lockring or not?
if it has a reverse threaded lockring (ie not 'righty-tighty') then it's a proper track hub.

yea its got a lockring threading, and now has a lockring that has been fitted 2 times.

but it slipped on me once and i can't figure why.

well at least it's not a suicide hub then.

try using loctite on the threads, and rotafixing the sprocket on, and then tightening lockring.

your photo is totally useless to demonstrate your problem ;) take the photo from the opposite side to show cog, lockring, hub threads.
the reason it slipped is because the lockring / cog were not on all the way.
the way you can make sure is put the cog on and then ride the bike up a hill, "hard start" to make sure the cog is all the way on the threads. then take the wheel off and tighten the lockring as much as you can. get a good tool with some leverage. like that shimano one from PX or the FGL. dont pedal backwards before you tighten the lockring.

or it could be that the cog is thinner then the threads and that the lockring will not press hard enough on it to lock it. what brand of cog/lock ring is it?

also if you ride around liverpool st put on a front brake. people jump in front of bikes. its like they dont see you.

This is the other side, before it had a lockring, i'm not sure of branding of either. I'l go do some 'hard starts' now and get it tight.

and brake is in the post. it's undrilled so im getting a clamp on. I just wanted to take it for a test ride.

This all makes sense, i just wanted to make sure.

sorry i know these pics aren't ideal. they are just the ones off the for sale thread