Kids on Bikes RPG: Strange Adventures Vol.2 (Softcover) - Rules of Play says:
Strange Adventures #2 is a non-core book of adventure hooks and story guidelines for people exploring the world of Kids on Bikes. Featuring 17 brand new towns to explore and 3 adventure prompts that can be added to your existing game! The book even features rules for giving your kids bikes that impact their stats! So check out these adventures from writers like Rob Daviau, Clio Yun-su Davis, Sarah Doombringer, and Jonaya Kemper.