Nitto MT Column 22.2mm (1 fork) to 28.6mm (1-1/8 threadless stem) For installing threadless stems on a threaded fork Approximately 25mm rise increase possible if used with spacers 130mm tall, cold-forged aluminum with knurled clamp surface Quill Insertion Diameter: 25.4mm for 1-1/8" stems and 22.2 for 1" stems Steerer Clamp OD 25.4mm, for 1", 28.6mm fir 1-1/8