RE: 19mm Hex
there are the thunderquake rims, hotbodies big rim, genesis chrome rims and the nitroquake rims, they all have 19mm hubs. what truck do you have? if you have 8mm axles there are more hubs you can use if you change the 19mm axle carrier. if you can change them out you can use a choice of hexex, the 14mm from hpi savage, 17mm from xtm mammoth st, or the 23mm from cen nemisis.