How would I make this vehicle move down the ramp without falling over?

I’m trying to make a quick non-drivable vehicle but I can’t manage to make it roll down the ramp with stability. I’m also trying to not use suspension since it’s a shopping cart.

I’ve tried changing the mass in different areas of the vehicle but it’s still giving bad results.

You should code it into a fixed route otherwise its physics

The character mass also affects the vehicle, try setting the characters part to massless.