Minoura Spindle Stand Hollow Cranks Steel Black Raceface Compatible SPN-20Minoura SPN 20 Spindle Stand: 13 or 21mm diameter arm fits most Hollow Tech II type Cranksets. This spindle style bike stand is ideal for general maintenance or display use. Adjustable to work with Shimano SRAM or Raceface Hollow Tech II type cranks. Includes two removable Spindle adapters: 13mm diameter arm to accommodate narrow Hollow crank shafts and 21mm diameter arm to accommodate regular size Hollow crank shafts Three position height and angle