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I have these chain tensioners: enter image description here

How do I install them correctly on my single speed bike? Do they go on the inside or outside of the frame?

My dropouts look something like this:

enter image description here

Apologies if the answer is really obvious. Appreciate the help.

  • The bolt is on the open end of the dropout and the axle goes thru the hole – paparazzo Oct 29 '14 at 21:28
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They look like you want those "in" the horizontal dropout. The bracket should cover the frame and as you tighten the bolt it will pull the axle further away from the cranks, tightening the chain along with it.

enter image description here

Be careful to not over tighten as you want a little 'slack' in the chain. Also, it is very easy to tighten one side more than the other resulting in your wheel not rolling straight (just slightly off center is what I see most often).

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  • Thanks for the detailed answer, to clarify the tensioners should be fitted on the outside of the frame? – Mr B Oct 29 '14 at 22:02
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  • Not on the outside, not on the inside, but in the horizontal area of the dropout, the bracket will be on the rear of the dropout on the frame. The photo that @mattnz added shows a similar chain tensioner. – Glenn Gervais Oct 29 '14 at 22:31
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    Can't see the pics here, but almost definitely outside. The "inside" gap should already match the hub width, so there's no space. – Emyr Oct 30 '14 at 9:42
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    @GlennGervais I am super confused when you say "in the dropout". The OD of the eyelet is way bigger than the dropout slot (the ID is what matches), so the only way it could fit inside is if you put it at some strange angle (then there's no way the axle could fit) – Nick T Oct 30 '14 at 17:17

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