I ended up having to build the wheels due to no one selling 14” disk wheels. Small wheels are a trick to build!
The fist task was building the fork. This is my first fork with my home made fixture. The fixture worked great but will need better fork blade support for tack welding.
My 3 year old struggles riding her cousins bikes with coaster brakes because she locks the wheel every time the pedal hits 12 o’clock. She jumped on this one and started ripping around. She also started skidding the rear wheel and loved it.
I found it hard to believe that no companies that sell 14inch disk kids bikes sold wheels for those bikes. After way too much research I had to use 14” folding bike rims with fake Novatech 28 hole hubs.
BMX rim hoops wouldn’t work well because they all were 36 or 40 spoke count.
In the end having a Shimano freehub was important due to chain rub on the seat stay. I had to use a 68mm bb shell with all the shims on the non drive side with a 6mm offset chaining. Lessons learned
Not totally… My design in bike cad is gone?? Probably never saved it. I will rebuild it in bike cad and post it up later. Here is a screen shot of the general idea. I think the front end is the only change. I landed on a 70.5 HTA with 37mm offset for 24 MM of trail. Head tube length ended up 120MM and fork AC became 255.
I think around 255 of reach. The design was around a one piece bar stem. I currently have 35MM stem on it. I wish it was about 10MM shorter reach with the 35mm stem.
If you have a newer version of BikeCAD, it will prompt you to save your current CAD when you change files or close out. I think that is how most of the BikeCAD’s go missing…
For the discs on tiny bikes, you can take some inspiration from the Race BMX world: COMMENCAL BMX PROJECT
They use a flatmount caliper and 120mm rotor. Obviously, FM comes with its own problems, but it looks really cool:
This version failed spectacularly. I still do not know where the other half went
I will be doing a PTEG version printed in the correct orientation next time… I am shocked at how well this bender did. Its biggest fault is the tube holder at the end is much too thin and cuts into the tube. I am making thick aluminum parts to fix that. Wrapping the painters tube in tape also also the problem.
