Build a bullet fast pinewood derby car by using our SUPER WEDGE X 133: Derby Champ's Super thin pine wedge features holes drilled for perfect rear weight placement and balance using our Slotted Tungsten Round (product #716) Weight that fit perfectly into the large center hole, and precision drilled axle holes for an extended wheelbase with 3 wheels on the track. Perfect or those who want to race with 3 wheels on the track or use a Rail Rider(TM) Alignment. For a 4 wheels touching we recomend the SUPER BLOCK X 132.  Wheels and axles are sold separately to give your car that winning edge!