Lowest part of the underside, was a tad over 35mm. It scraped on everything, coke cans, dead mice, sumrfs (pic on here somewhere lol) Still went through MOTs, i have searched the net for a 'legal ride height' but found nothing. If its not affecting steering and handling, you not damaging the ground, whats the problem. One thing I havnt looked at is legal limits in headlight, indicator etc heights.