United Recruit JR 18.5" BMX Bike. The Recruit JR is an 18.5" top tubed BMX bike made for the entry-level rider that's just stepping up to the full-sized 20" wheels. With a sealed BB, sealed rear cassette hub, and a touch of some of the aftermarket united parts. These Recruits are incredibly high spec'd but affordably priced. Image for illustration purpose only.