Part #: ECX8321
This is an optional ECX Spindle, Carrier, & Hub Set, and is intended for use with the ECX Smash. This package includes two front spindles and two spindle carriers, as well as two front axles, two rear hubs and two ball studs.
ECX Spindle Carrier & Hub Set Smash ECX8321 - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available.