 The song starts with the heavy bass line the song is built upon, and goes on with guitarist John Frusciante playing the riff along on a 1969 Gibson Les Paul Custom (one of the few times he has used a Les Paul for recording), followed by a deceptively simplistic drumbeat from Chad Smith, which almost unnoticeably shifts the beat every 4 bars during the verse - the snare hit is changed from the third note to the fourth, creating an illusion of odd timing.It is one of the heaviest tracks on the album.The bassline for "Readymade" also carries similarities to the bassline for "Mountain Song", by the alternative band Jane's Addiction.