6個月一下baby不能直接用這個stroller,說明書上應該寫了的。你應該買一個adapter裝在stroller上,然後b2infant car seat放在adapter上就可以推車了。我當時用的是chicco的infant car seat, thus ordered one adapter that is compatible with chicco. check this link below:
http://babyjogger.com/c-31-Accessories.aspx