Roval and Specialized appear to be returning to road tubeless after last year’s curious non-tubeless tubeless wheel launch, we question the merits of Ratio Technology’s latest 12-speed conversion kit, and — no surprise — Shimano made a heck of a lot of money last year. But we also now have more concrete proof that the Covid-fueled bike boom might finally be cooling off a bit. And what’s Dave Rome’s favorite chain checker? What’s on the Nerds’ wish list for internal cable routing? How do you graphics off of DT Swiss hubs? And do Cushcore gravel inserts work with all rims? We tackle all of that in this week’s Ask a Mechanic segment.