Revell Pinewood Derby Car Quick and EZ Bundle Basic Racer meets BSA race-legal dimensions, axle slots for accurate assembly, expert instructions EZ Body shell is a hard, light durable plastic and can be attached with glue, screws or hook and loop Weights are 99.99-percent lead-free and segmented for fine-tuning, attach with included double-sided tape Official BSA wheels and axles, completely race-legal. Four 1.25" diameter wheels and four axles