Tensioning And A Drive Issue

[CBProductions]

hey people of the forum , hope everyone is well?

First off I went riding last night and noticed that everyso often my cranks would become really tight to to move, so after a spin or two they became back to their normal self! Im curious to see if anyone knows this issue and maybe able to spread some light ?

Second issue is more of a look to see whats there, I run my eno up front and a cassette on the rear being tensioned by a normal mech and I still get that slapping noise of the mech ? is there another tensionor that can eliminate this or a method i can use to stop this ?

Much love

CB

[Shaun H]

I'm very well thankyou

First problem may be due to a stiff link in the chain, causing the drivetrain to become stiff until you spin the cranks and loosen it off again. Could also be some inconsistency in the freewheel, or in the shape of the teeth on either the freewheel or the rear cog.

Second problem, buy a Rohloff

[kid creole]

first problem maybe the bottom brackets bent so as it spins it moves closer and further away making it tighter and loser but you should be able to notice it on each complete turn.

second problem only use the last jokey wheel on the mech then the spring holds the mech against the frame all the time so you don't get the banging noise , thats how mine is and works great.

Edited May 11, 2007 by Alain

[PaRtZ]

Second problem, buy a Rohloff

he has no money!

I think the mech was slightly out of line, but that doesn't explain the eno thing that was just weird. It would get stiff, then spin it a few times and it was ok :S

[Waddy]

to stop th mech slapping, either zip tie it to the chainstay, or put a washer between the mech and the hanger, thiss will lock it out, and stop slap

when your cranks go stiff, are they stiff forwards and backwards, or just forward?... if its forward it could be a bearing gone in your hub, if its both ways, it may be your freewheel or bb,,

Edited May 11, 2007 by wad

[CBProductions]

Thanks for the help guys. All these parts are pretty new except the freewheel I guess. Those rolhofs do look the sex. .

Also I think this is the mounts but the brake keeps slipping out of position even though its mega tight ?

[Rumplestiltskin]

I've got the chain tightening mid - revolution problem. I think I heard someone suggest ages ago that it could be either my chainring at the front or my cog at the back had warped (i.e. become egg shaped) and the tightness was caused by the egg reaching its peak as it rotated. Since you run a front freewheel its a bit harder to explain, but maybe its become warped somehow, or the cog you run at the back? Since I run a singlespeed its pretty easy to determine this, but since you run a cassette its a bit more difficult. Does the tightening occur on one dominant cog of the cassette and not on the others, or does it happen on them all? If its them all, I'd look at the freewheel a bit more closely, but if only one cog causes it, maybe its warped. I used to use one main "trials cog" when I ran a cassette, so all the really hard stresses were concentrated on it, whereas the others were mainly used for transport or the odd bigger run up. Could be worth checking anyhow, though I don't know if its complete bullshit. It does seem logical though, so give it a try.