Amarok triple clamp By Glenn Bergevin on 20 May 15:09

And if anyone was wondering - adding lightening holes to the structure really doesn't work well in this case. Stress concentrations cause stresses approaching yield under what I took to be typical loading.

This is actually similar to what I am planning.

This is good, I was wondering what did you use as a typical load? Remember this tree arrangement is used to steer with and it is not used to support the front-end.

I understand the application of this triple clamp - I'm a big supporter of Hossack type front ends. I loaded this with a 100 lb downward load at each 'fork tube' clamp, plus a 100 lb forward load, simulating a heavy rider with most of their weight on the bars in a 1G hard braking scenario, ie trail braking before a tight corner. This is where the stiffness of one design will stand out over another, mine deforms, elastically, 1.6mm at this load.

That's cool Glenn, I think that if you just added a 4mm thk about 8mm high rib diagonally across on each side in your pocket areas it will take care of that deflection and not add much weight. Just a thought.

Hi Glenn, 1.6mm deformation at the extremity of the bracket? I agree with your worst case. I applied similar values but on the handle bar (hand position).

Guys, I made a typo - deflection is .16 at the given load. 1.6 would be far to much here.