“one g” slot car rules open up the field variety letting. The full weight of a car is easy to find but for the weight over the rear axle, i use a block the same thickness as the scales with a slot in it that the guide sits in and the front wheels sit on. Pin by Ricardo Allen on H.O. Scale slot cars Slot cars, Slot These are commercially designed to correspond to the o gauge model trains. Slot car weight scales . The selected item is out of stock, please select a different item or combination. Not to worry ,i just finished my slot it porsche for the world champ proxy next year using a light weight plafit chassis with a total weight of 90gms so next years gt3 is looking good & another fun challenge. Most 1:32 slot cars are about five to six inches in length. My car is suffering from too much weight which i half heartedly attempted to cure this year but ran out of time. Suspend the car at that point, and see which way it tips; If toward the front of the car, add weight in