54366 RM-01 Front Upright Shaft (for 1/8x5/16 Inch Bearing)
The upgraded upright shafts are a replacement of the standard shafts used in the stock plastic uprights. These allow the use of aftermarket 1/12th scale wheels that use the 1/8 x 5/16th inch bearings. The standard wheel axle uses metric size bearings for use on Tamiya wheels. The use of inch size bearings will open up the racers options.