Multi Gauge Rail Bike Cart Build And Testing

Back in May 2022 I built this contraption so I could pedal along tracks and then take the bicycle off the cart and ride normally without much hassle. I think I could have worked out the issues, but I kind checked most boxes while testing, worked on 3 different gauges, worked reasonably well with different bikes. If this video did reasonably well (or any of my videos really, preferable like 20 at least) I could probably afford cooler experiments. This one cost less than a thousand dollars and I had to reuse parts for the next one.
Music from hesangasong https://www.youtube.com/watch?v=H10BcDkNzVw
Bret Mitchell https://www.youtube.com/watch?v=R37P8sPmA3Q
Moki Piano https://www.youtube.com/watch?v=HDAK1qbTDFM