How to tighten a tandem chain using the eccentric bottom bracket
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- čas přidán 8. 05. 2017
- The pedal cranks on tandems can get out of sync if the linking chain falls off. This can be due to the chain being too loose. On this video I hope to show you how to fix this.
Easy to understand and gets to the point, well done!
I keep the cranks on my Santana Elan two teeth out of phase, (24 degrees), allowing the stoker to push the pedal through the captain's top/bottom dead center phases, and vice versa. This gives a measure of the out-of-phase advantage without the risk of slugging the pedal on a turn or a speed bump.
The bottom bracket eccentric shell on my bike is not a split type, but rather in a full circle shell fixed by set screws that press into the eccentric.
The split bottom bracket shell is a potential weak spot in the frame, especially with two strong riders, the whole bike is held together by those two bolts.
I use half-step-granny gearing, (24-47-52 chainrings and a 13-32 six-speed freewheel), SunTour ratchet shifters, Scott-Pederson self-energizing rim brakes operated from a dual-cable right lever and an Arai drum brake on the left lever.
It's a pretty sweet rig, rides smooth, and looks pretty good, even thirty-three years later.
Thanks for the video as I need to tighten my tandem chain. Also great you are offering tandems for special needs people. I'm using a tandem currently as my right foot is in a cast and can't pedal so I put a bracket on (just cut the arm out of a crank and welded the pedal nut part in the centre then attached the pedal back on) and it's been so great to get out again. Great job!
Thanks for your kind comments.
Thank u for good video. I've just bought a second-hand tandem bike and notice that the pedals are out of sync and basically I wasn't too sure how to put it right. Cheers buddy👍 oh & happy new year 2 u
Hi. I have myself a vídeo about this (in portuguese). There is a very important detail, one should tight the boacket using the opposite direction of the usual pedal movement, because the spheres spin tend to untight it. When we bought our tandem, I was doing it wrong, and after 2 or 3 rides, the chain got large.
Gracias amigo!
Perhaps its just me but when checking the tightness of a chain I would always spin it all the way around, as normally I've found there are tight and loose spots on a chain and it depends on where about in it's cycle it happens to be.
Yes, I do that too.
What bike is this?
Dawes Super Galaxy tandem