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I replaced the headtube with a long head tube and got a 1" BMX fork and slid a 1.125" steerer over the top and Tig'd it up
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I cut the steering tube in half and drilled holes around. Then I stuck some 2mm tube with fitting diameter in and spot welded through the holes. But on my long bike it doesn't have the same stress as directly in the fork. Would trust this method though.
For the headtube i took tubing with a too small inner diameter. Bought a reaming tool for lots of money and built an extension for aligning and pre-tensioning.
It slides over the threaded section of the tool and is held safely by the small screw on the right.
Because all the cargo frames seem to be delivered with readily machined tubes i didn't find a single shop around my city that has appropriate tools...
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M_A_X
Brainfart_Industries
@Jonny69
You folks with the MTBs and road frames converted to 20” wheel on the front for a front-loader, how have you extended the fork steerer?
Edit: also, how have you lined up the two head tubes / head tube extension well enough that it doesn’t bind up when steering?