The description of the bore size of the new high torque 20T GT3 pulley is not clear. GT3 Timing Pulley - 20 Tooth - High Torque Series ' This pulley has a clamp that locks onto the 8mm diameter rod/lead. ' ' Bore Size: 0.25" ' I suspect the former is true and the latter is a typo (possibly a copy paste from the old pulley specs? ). Can you please confirm which of the two is true?