John Spiker is an American musician primarily known for being the bassist for Tenacious D since 1999, and for the Industrial Rock band Filter from 2008 to 2010. He currently plays guitars and keys with Ronnie Vannucci's band Big Talk.
Spiker was born and raised in Columbus, Ohio and graduated from Upper Arlington High School in 1999. He got his start in music playing the piano and drums at a very young age. He has played guitar since age 12.
In 2011, Spiker joined Ronnie Vannucci's new band Big Talk. He plays keys, guitar, and sings backup vocals with Big Talk. Spiker spent the beginning of 2011 touring with Disney Channel's Shane Harper. He played guitar and sang backup with Shane. He has spent a good part of 2011 recording on the new Tenacious D album. Spiker is engineering the new album, along with playing bass. Spiker also Produced the new album for Brooks Wackerman's band, Kidneys, for which Spiker plays bass.