Standard Wheel Base - Axle Slots: Precision-cut axle slots that match BSA specifications in placement, depth, and width.
Standard Wheel Base - Axle Holes: Precision-drilled axle holes that match BSA specifications for placement. The holes are drilled with a #44 bit (fits BSA axles). One front axle hole is slightly raised so that the car will ride on three wheels (best performance).
Drilled axle holes, 4 wheels on the ground - add $1.00.
Drilled axle holes for Awana axles (3/32" bit) - add $1.00.