Hi everyone, I’m currently working on a folding bike project where I’m transferring (almost) all of my parts from a BMX bike.
I already have the crank and a bolt on 110bcd spider to use for the build.
Right now, I'm facing a compatibility question about using the 3-piece, 19mm 8-spline BMX crank on the folding frame. My two workarounds are: 1. Euro BB (68mm BSA) — most of them are 73mms except only one brand is available to me: Showke, a Chinese BMX brand. I've seen a reputable local BMX shop selling this brand. 2. 24mm BSA external BB + 24-to-19mm adapters (shims)

My gear setup is 1x6, where current chainline is 47.5mm which works fine with the rear cogs. For context: I don’t do jumps or tricks — this build is just for casual cruising. Which setup do you think is better in terms of ease of installation, maintenance, and future-proofing?

Can i achieve same chainline with external bb? Or internal plug and play euro bb but unknown brand is better?