Hi all

Currently building a python trike :-

http://en.openbike.org/wiki/Python_Trikes

Based on the third one down.

The bikes are here :-

http://www.python-lowracer.de/

I have :-

Moved axle over in 2 BMX wheels cut off surplus and ground smooth
Fitted Big Apples to all 3 wheels
Welded 2 nuts to inside of some 1/8 plate and welded them to the ends of a piece of 1.5" x1.5" x 1/16 that is 25" long [ welds need a little cleaning but not much ]

Couple of the welds:-

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and :-

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As you can see on both these pictures the end cap was a little larger than the tube on 2 sides , I tacked it on first then welded each side in turn , I then ground down some of the weld and rounded off the corners but left the weld proud so as not to weaken it.[ these pictures are from before they were ground ]

Mock up at 36" wheel base :-

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So rear axle is done.

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regards Paul