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It's hard to tell based on all the stuff bolted to the rear axle, but it looks like a semi-horizontal drop out to me that and the chain is WAY too long even with that gimmicky tube thing he's got a ton of slack in it (look at the top of the chain in the second photo). That hack is a poor substitute for proper wrenching.


Can't help but think correcting the chain tension would be not only more effective, but easier!

A cyclist from Stockholm

Why not removing a link or two and fix the issue for real? That's a pretty easy hack too.


on a single geared bike, doesn't it seems to be a rather loosy solution compared to shortening the chain to the correct lenth ?

john h

I guess if it gets you to point "B" in a pinch. But that looks like a new chain. Dude needs to adjust the length by removing a few links. Nice shiny rack and fender-stays though. =)


As long as you don't mind having to replace the PVC every once in a while, and don't mind having to keep moving the pipe towards the crankset, it's a fine chain tensioner.


Part of the problem is that his chain is too long. Pulling the wheel back in the dropouts or taking out a link may have solved it without resorting to that noisy contraption.

Over 40 Cyclist

Looks to me like he just needed to tighten up his chain.

"Bicycle Bill" Scheitzach

If Gabriel had that much slack in the chain on what appears to be a single-speed bicycle, maybe he/she needed to remove a link or two, or readjust the rear wheel in the dropout.

Ron Ablang

It doesn't look like he filed inside the PVC pipe to reduce friction...


Well, I already tried remove a link, but the chain gets too short, and don't reach itself. I'll try to change the rear cog, which is almost broken, and get a better gear ratio, could work. I made this hack almost a month ago, and the pvc pipe still going OK. Forgive my bad english.


As much slack as there is in that chain one link shouldn't make it too short.

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