Build a bullet fast pinewood derby car by using our SUPER WEDGE 140: Derby Champ's Super thin pine wedge features holes drilled for perfect rear weight placement and balance using our lead wire or tungsten cylinder 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. For a 4 wheels touching the track we recomend the SUPER WEDGE 130. Wheels and axles are sold separately to give your car that winning edge!