You don't need a welder, you just need whatever tools you have.
It was 1997 or so, and I was noticing that all the cars looked the same, and all the houses looked the same. Then I realized how expensive that was for the people to do it, to go out and buy whatever new car the superbowl halftime ads told them to.
It must take a powerful fear to motivate such extravagance.
The fear of not blending in.
I resolved that at least my bicycle wouldn't be just like every other.
In a blur of frantic grief for the conformists, I started working on my bike.
I recalled something we used to make as kids, "upside down tallbikes".
Note - This instructable is "descriptive documentation" and doesn't show any hands building things, just the things themselves.
Warning - you can fall off one of these and get hurt.
At least one person broke an arm falling off one of my bikes. I felt really bad and didn't let anyone ride my tallbikes for a year or so.
Step 1: Get the Right Kind of Back Wheel, Invert the Fork
The kind you want is called "coaster brake" or "bendix hub" or "back brakes" or "standard".
In the U.S. it's the default type of hub on a bike that has no other name.
It's our nation's greatest contribution to the bicycles of planet earth.
By using this type of hub you'll avoid having to mess with shifter cables, derailleurs, etc.
It'll make your tallbike building experience much quicker and more pleasant.
I bought this cruiser bike for $20 from a yard sale on Cape Cod.
I could tell something good was going to happen, so I took these pictures.
As seen here,
I took the fork and handlebars off and put them back on upside down.