Thank you, that’s really helpful.My trusty tape measure reads 230mm bottom of the front bumper moulding.
However, getting underneath the car, you are looking at 130mm or as nears as damn it 5".
Speed bumps can't be legally higher than 10cm, you'll be fine.To be honest I am wary of speed humps especially the one's that are in pairs across the road. I don't straddle them I go over with one wheel.