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Freewheel/chain Tension Problems!


Daborn Meister

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I tighten my chain, the freewheel makes the wheel go backwards when it shouldn't.. I cannot have the chain any less tight or the chain hits the chainstays. Once i do get it right it skips, i'm not sure if this is not just the bottom bracket though? Also when i pedal the freewheel moves left to right and vice versa? Do i require a new chain length and bottom bracket? Help!

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It is really hard to get anything helpful out of your description.

what setup are you using (frame, cranks, bb length, bash, gearing ratio, freewheel, tensioners etc...)?

what do you mean by "it skips [but it could be the bb]" either it is skipping or there is a creaking noise, which one is it? skipping you will often feel, creaking you will only hear.

what do you mean by "the freewheel moves left to right"? the whole freewheel or it just appears to because the threads on the crank are not perfectly straight so it creates an offset/tight spot? photos/video?

what do you mean it makes the wheel go backwards when it shouldn't?

how long have you had it?

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Ahh good point, really should have expanded on that..

Frame is a KO KM1, cranks are Echo Forged, BB length is 118 i think? Bash is try-all symetric, gearing ratio i believe is 18-12, try-all 108.9 freewheel, try all snail cams with cut notches.

It must be skipping then, but there was nothing wrong with the freewheel before i put it on.

The freewheel literally flexes left to right when i'm riding, could this be the BB maybe? And when i turn the cranks backwards instead of the freewheel clicking it actually engages and makes the wheel turn. All is old but the cranks, however all appears to be in good condition.

Hope this clears it up slightly better, sorry!

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If you over tighten your chain it will cause the backwheeling issue you are talking about but should not affect you when riding.

As for the skipping try-alls do that... A LOT!!! it will not cause you an issue as there are so many engagements, it will just be annoying.

With the moving side to side, hold the end of the cranks and flex it back and forth towards the chainstays, if you see the bb moving it is not in the frame properly or the bearings are gone, if not it is the crank, crank/bb interface or freewheel. Once again videos would help

Also the tensioning problem is probably due to the fact you are using notched tensioners, try smooth one or cams and it should make things easier. alternatively if you can, get a longer cam bolt and screw it in from the other side of the frame so it is not the head the cam pushes against but the other end. this should affect the cs length by about 1mm which might be all that you need.

Edited by sstein
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