TacoFighter3011

I just built up an '83 Mercx pista and I'm having some trouble with the drivetrain.

Sometimes, when I go up a hill or need to push back to stop and I really need to push down hard on the pedal it slips-meaning, that it gives as if there was no resistance. Usually when this happens I end up falling on my face. It's happened twice so far and I'm just about to buy a different chain (I am using a Miche now), but figured I'd see if anyone could offer any advice before I ponyed up the twenty-five dollary-doos for a eco izumi.

I've checked the cog and that doesn't appear to be moving. The chain line is pretty straight. It is probably off being absolutely straight by a millimeter or so.

Also, I have a pair of C-Record pedals that I was using with this set-up, but the clip busted the second or third time I needed to stop. I only use a single laminated strap with these and would like to keep it this way. Does anyone have any advice on keeping these things from breaking when you need to stop?

Retem

your lockring and cog are loose it sounds like you cog is slipping and your hub maybe stripped as well

thatcher

yeah its your chain its probibly streaching. some guys get that who have really massive legs. the only thing to do is get a nother drive side crank arm n chainring the same size as your existing chainring. put a nother same size cog on the other side of the hub n run a double. the equal pressure will equalize the pressure n allow you to ride nice and smooth. try it i promise itl work

Terror_in_pink

Try removing the cog and lockring and check for stripped threads and make sure everything is wrenched down tight when you put it back together, like Retem said, sound like it needs some tightening. Just start poking around and see what you find.

Retem

oh btw I use the kmc z chain all chains stretch I can afford to replace mine every time it stretches that way I can buy 10 z chains for one izumi

skinnyland

roadgator

i assume the chain tension has been good and the front ring doesn't look warn?

Igneous Faction

Retem's probably right; I don't know what the rest of these jokers are talking about.

What hubs are you running? What cog? What lockring? Who installed? Do you know what you're doing (no offense)?

jasonyates

Yes sounds like a loose cog and lockring. If it feels hand tight it still might be moving when you ride. The chain wouldn't skip and then just stay on; it would fall off.

Also, if I had to I could ride my fixie around town with platform pedals and no brakes and not have a problem unless some kind of unexpected/emergency situation arose. Now I'm not the same as everyone out there, but what I am saying is that if you are stripping hubs and breaking straps and you weren't about to crash or something then you may need to get more in sync with the bike too.

But yeah lean on that cog with a chainwhip and then lean on the lockring with a proper lockring tool. Doing it properly with the right tools works pretty well.

Retem

rotafix the cog and then tighten the **** outta the lockring or you might die

tellyho

I love the double-up solution. I'm going to do it right now.

TacoFighter3011

Retem, thanks for your advice. It was the cog that was slipping. I ended up rotafixing it like you suggested and I haven’t had any problems since. I had to buy a new cog. I was riding on the Miche splined-carrier set-up and that was what the problem was. I just took that off and put a regular cog on.

Igneous Faction, I don’t know what I’m doing, but I’m slowly learning. No offense taken.

Thatcher, thanks. Choke on a cock you guzzler.