Click the microphone in the search bar to try again, or start typing your search term. Identifying the serial numbers on the early Mongoose frames is actually quite easy and intuitive with this guide. The Mongoose Legion L40 Bike is ready for the beginner to intermediate level BMX rider. The Mongoose Hooligan AL 29″ Bike… Continue reading Norcal Interscholastic Cycling League #morekidsonbikes