Just fitted an On One 'Doofer' (I think?) chain tensioner thats been in my cupboard for years, a singelspeed cog and spacers on a 9 spd hub etc. Using a normal 9spd chain cos the front ring is a 9spd middle ring and it seems to fit the rear cog ok.
Under any sort of load I get a slipping 'clank/crack' noise and loss of power at the pedals as though the freehub is slipping. I'm running 32:14.
I've tried 3 different back wheels from fancy to bog standard Shimano and it still does it. Which leads me to think its not the freehub? Or are geared freehubs not up to the load? I've got the sprocket 2/3rds the way across the freehub body, probably about where it would be on a normal cassette even.
So I can only think its the Doofer losing tension? It pushes out and down like a rear mech, rather than up towards the chainstay.
Anyone else had problems running this sort of kit? I have interchangeable drop outs so could get the dedicated singlespeed ones if this would fix the problem.
