* precision sealed MID bearings * 
* machined aluminum bearing cones * 
* extra crank arm spacers * 
* 19mm and 22mm *

NOTE: The inner diameter of the bearing is determined by the spindle diameter of your crankset, most bikes come stock with cranksets having a 19mm diameter spindle. Check the specification of your crankset to see what size spindle it uses. Any questions please contact us.