On this Dumoulin is a big man so shouldn't be able to climb narrative, I got puzzled because he has a very light, long build with none of that bulky baroudeur muscle. So I just had a look at his Wiki page. 6'1'', 71 kg (11st2lb). If he's just lost a bit of weight then he's not actually that far from Froome (wiki gives 6'1'',67.5kg) . Under half an inch shorter, maybe just 1 or 2 kg, if that, over Froome's vitals. Serves me right, I suppose, for listening to Ned Boulting on ITV4 because he keeps on about it, but there's little reason why he should disappear on the real mountains when many expect Froome to shoot up them. I reckon the comparative difference is not that big at all. That said, of course, he might struggle after a rest day, and make my don't write him off witterings completely inept.