10 Jan 2011 The turbo bearing system plays a key role ensuring that wheels keep into the journal bearing, as in the case of the one piece “Z-Bearing”.
A number immediately following the T identifies the total width of matched bearings, arranged back-to-back or in tandem; Polymer ball bearing with components
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RS provides a better seal but more rolling friction than 2Z. RS, Bearing with rubber seal on one side, one side open. 2 Z / ZZ, Bearing with a metal seal on both