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Horst link bending forces
Yesterday on the MTB I had to look downwards between my legs to see what
made a rattling noise on the bike, saw some brush tangled in the rear and hit both brakes quite hard. That's when I noticed how much the upper diagonal strut in a Horst link bends when applying a lot of brake force. The center of it bows down several tenths of an inch and also outward a little. It's a pretty beefy strut: http://www.analogconsultants.com/ng/bike/Muddy4.JPG Similar on other bikes: https://ep1.pinkbike.org/p5pb9586988/p5pb9586988.jpg One can see such bowing also on aircraft wings which as built and tested to high stress standards. They make the spars out of stuff such as 7178 which I assume bike mfgs don't: https://www.popularmechanics.com/fli...-stress-tests/ Has anyone else with a Horst link bike taken a look while applying the rear brake hard? Can this fatigue the strut to the point where it eventally breaks? Should I shore that up with maybe an L- or U-profile strapped around it? I am asking because I use my MTB for transportation a lot and ride about 2000mi a year on it, hard, not just the occasional weekend loop. It'll see hundreds of such strut load cycles per ride. -- Regards, Joerg http://www.analogconsultants.com/ |
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