4.375" on Center.  The slots are typically not exactly 90º and inconsistent on slot widths, allowing for difficult axle insertion.  Under pressure and force, the axle forms a groove into the slot and is very difficult to adjust alignment if not inserted at 90º 

Side Drilled

4.375" on Center. Drilled to 90º making axle insertion more accurate and true.

Check our Derby Kits that are available.

Derby Cars   *  Derby  *  Derby Car Axles 

Derby Car Supplies*  Derby Car Wheels

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