I believe the older generation? There's no mention of 'race' in title, though they are the folding version.
They went through c.30km of offroad sections on the ride? That's cycling over sharp rocks/gravel/mud/grit etc. Lots of very sharp stones and bits sticking out the ground. I didn't have a chance to properly visually inspect them after the ride as we had to palm the bikes off to the courier, but they did look to be in very good condition from the brief inspection i had. There were only very small cuts, no more than 3/4mm.