FS Singlespeed help
I’m setting up my old Pace 405 frame to run singlespeed, and just can’t get the chain to run smoothly.Posted 5 years ago
I’ve got a Yess ETR/D chain tensioner ( http://labs.yesspro.com/products/etr-d) fitted, and a single Surly cog, with a variety of Surly spacers. Whatever combination of cog positioning I try, the chain clunks irregularly when I pedal (just along level road). I’ve tried setting the spaces from one extreme to the other (from the chain falling off inside the cog, to the chain falling off outside), and just about every combination in between, but whatever I do it “clunks”.
anyone got any ideas?
You might slate me for stating the obvious. But have you tried looking down at the drive train while puting pressure on so you can give us all a clue about might be actualy happening?
You might find you get a few more helpfull posts/ a few less mistic meg posts. 🙂Posted 5 years agoglupton1976Member
Is the joining link in te chain wider than the rest of them? Clunking as it goes through whatever bit its hitting off at the time – determined by where the chain is sitting on the cogs at that particular moment in the space time continuum. Either that or its a gammy flux capacitor ken.Posted 5 years ago
you can feel it through the pedals, definitely.Posted 5 years ago
Hicksy, the tensioner is made specifically made for FS frames, and looks, and works, like a rear mech., so it takes up the slack as the chain grows.
I’ll have a play today and take a couple of links out of the chain, and maybe see if I can put more tension in the tensioner (the spring position is adjustable)
thanks for the ideas so far!
the Yess tensioner gets some good write-ups around the web.
Psling, I’m starting to conclude that the chain isn’t compatible with the cog…I’ve spend some time today fiddling, and putting more tension in, but I’m still getting the “clunk”. I’m starting to wonder if the chain is not sitting on the cog properly, and then slips onto it under pressure – which would explain why it doesn’t clunk with no pressure.
not sure what chain I’m using, other than I knowa KMC (?).Posted 5 years ago
Middleburn Mono 3/32″ chainring
KMC 3/32″ singlespeed chain
Surly splined singlespeed cog..3/32″
so that should all be fine. I guess the only thing I don’t know about is the pulley wheel on the tensioner…I think I read somewhere that it’s a “Shimano standard”..whatever that is. maybe that’s not OK with a 3/32″ chainPosted 5 years ago
The shimano jockey will likely be 3/32 too so all compatible.Posted 5 years ago
What size cog is it? If smaller than 16T (say for DH use) you may not be getting good chain wrap causing a slip.
Or maybe the freehub needs servicing… Maybe where davidtaylforth’s ‘chain’ of thought is going…? 😉
Get a friend to ride it down the street while you watch.
I found my trance worked perfect with a 18 tooth but slipped with a 20 and a 17 tooth. Round here I ran it with an 18 but at SSWC I ran it with 20 and a slightly too short chain and loads of air in the shock so it never got to full travel / longest chain point.Posted 5 years ago
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