Chain Guide as tensioner...?

BobCatMax · Apr 25, 2014

would it be possible, seeing as i have a duff rear mech hanger, to use a DMR chain guide like this..

..as a tensioning device?

what other options do i have?

Pauls Components loveliness

Rolhoff loveliness

Yess etr-b loveliness...

the problem is, lovely costs lovely money...£40+ on a chain tensioner?? and most of them need a mech hanger..

what to do?...educate me please

Raging_Bulls · Apr 25, 2014

Re:

I don't see why it wouldn't. As long as you keep the red wheel on the lower part of the chain (by that I mean the part below the BB axle), it should work.

Just keep in mind that you'll need to manually adjust it every time the chain wears. By the looks of it that first pic you posted, it means loosening the drive-side BB cup for every adjustment.

amedias · Apr 25, 2014

Re:

Whats up with your mech hanger, stripped thread or bent/missing?

Unless it's actually snapped off and then they can normally be repaired relatively easily, even when snapped off there are options for axle mounted hangers

BobCatMax · Apr 26, 2014

@ Raging_Bulls - it's actually one of these, but i didn't like to link to someone's for sale photo. I've taken the plunge now

I figure as long as it's keeping a little tension it shouldn't need that much adjustment..

@amidias - it's for my Kona, which I broked. Mech hanger is non-replaceable aluminium, bent, twisted and stripped...

suburbanreuben · Apr 28, 2014

Re:

"Tensioner" is a bit of a misnomer. As long as it takes up enough slackit's doing it's job.
Gear hanger mounted tensioners often have problems taking up enough slack unless they push down, which ain't ideal.
The DMR will be ideal. Once set for a certain ratio you shouldn't need to adjust it again over the life of the chain.

foz · Apr 30, 2014

If you're running it singlespeed and not fixed, then it should work fine - it essentially does the same as a gusset bachelor

BobCatMax · May 3, 2014

Excellent. thanks for all the advice.

Now, the search is on for an Eccentric BB!

ba57ards · May 5, 2014

if u want could karma over the dmr sts thing i got of a frame it needs a clean and one of the bolts is rusty but its usable can do pics if u want ? am in crawley if ur passin this way at all ?

tony

ba57ards · May 5, 2014

sod it saw u havent got a mech hanger whats left on urs ?>

BobCatMax · May 5, 2014

not much, lol.

It'll run a 32x 18 with no tensioning required, but if i want to drop to a 17 or 16 as i get fitter it becomes a bother.

Chain Guide as tensioner...?

BobCatMax

Raging_Bulls

Sbike Fan

amedias

Senior Retro Guru

BobCatMax

suburbanreuben

Old School Grand Master

foz

BobCatMax

ba57ards

Senior Retro Guru

ba57ards

Senior Retro Guru

BobCatMax

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