Hi Steve,
Ah, the speed bumps! Ride height is like "limbo" how low can you go? 4" would be the minimum used on GT40 race cars in the sixtes. Our cars are happier on the road and over the bumps with 4.5>5.0" especially when running larger than 24"dia. front tires. Here's a pic of Johns right hand drive car, the first equipped with the new arms. Is that beautiful or what
Cheers