I love this, how are you sourcing compatibility data?

Thanks! I'm using this as an experience to teach myself mainly. I'm not an expert cyclist but I prefer to DIY when I can.

For example, I looked at tires and wheels as a good litmus test. What were the minimum pieces of information that you need to know to pick the right tire or wheel and make those the only filters on the site.

In terms of expertise, I've mainly farmed out to the cyclist community on Mastodon and served requests on a first-come-first-serve basis. For example, one person pointed me to sheldonbrown.com for their article on tires and it was really illuminating.