Non standard 42mm ISIS bearing specially produced for unicycles.  This bearing fits Kris Holm, Impact, Onza, Nimbus & Qu-Ax ISIS hubs (does not fit Koxx hubs unless shim is removed).

Features:
Designation: ISIS Bearing or 224212
Shield Type: 2RS (Double Rubber moisture shield)
Internal Diameter: 22mm
External Diameter: 42mm
Width: 12mm

 Sold in Pairs (bearing shield colour varies)