I asked got some leeds but this is what i came up with no plans all off the top of my head
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Step 1: The Start
complete bicycle, third wheel,bicycle frame
Step 2: Weld
i welded 1" tube frame to bike frame leaving room for foot to peddle
Step 3: Third Wheel
i welded and cut off 4-6 times this was not good spot
Step 4: Another View
Step 5: Another Veiw
as you can see third wheel is still forward
Step 6: Complete
i should have taken more photos but here it is as you can see third wheel is back supported by spare bike frame
Step 8: Rear of Bike
sidecar i left open -more of a cargo carrier
Step 10: View of Weld
not the best weld my first time to weld a project
Step 14: Finished
the bike is bulky sidecar 3'x3' about i did this with no plays the bike handled good with 300# of cargo no problems turning left or right
1 Person Made This Project!
Databanks made it!