Just to throw this out there....6T Front center and rear center
Truck was bought mid summer and raced a couple club races and 2 weekend events...buddy used a variety of .21's NO .28's
Front
Front
Rear
Point im trying to make is that ALL vehicles suffer from wear....if you let it slide for 2 year's and the outdrives are notched and the pins are Flat you have been suffering from degraded performance due to the sloppy drive train.
Xray/Hudy pins are IMO no better then Mugen or Losi...Ive Tried them ALL.