Its like they just used the same clearance from the bmx race frames that run like 1.5” tires. I posted a bike for sale last year and when I took the photos, I left it in the granny gear . I got criticized because of the length of chain on the bike. People who claimed to work in bike stores, or manage bike stores were saying it was too short. I sized it EXACTLY how shimano tech's tell people to size the chain.