Red bike

Red bike 50 Green bike SOLD Red Rambler Columbia 20 BMX bike Kids/Teen bike Has Kenda-Flame wheels instead of stock wheels, only because the old wheels had no traction tires were smooth asf. New chain has been added think I put it on wrong it keeps falling off. And comes with bell Tires are flat on both bikes for now if needed I can fill them with air Green BMX -Walmart bike Kids Bike Everything works fine besides the fact the tires are flat