Wcs 40world championship series41 these words evoke the core philosophy behind ritcheys highest performance components the rainbow stripe wcs logo represents the numerous world champions that have won on ritchey the wcs line is the gold standard for lightweight bombproof race parts and cutting edge innovationfeaturesa press fit style headsettitanium coated high quality long lasting bearings only featured in wcssupplied with matching ritchey carbon star nut 40contains star nut carb