Jérôme Pineau (former manager of B&B) said he suspects Jumbo Visma use mechanical doping (he said they're on something 'worse than doping'):
Dans Les Grandes Gueules du Sport ce dimanche sur RMC, Jérôme Pineau a exprimé ses doutes devant les performances de Sepp Kuss, Primoz Roglic et Jonas Vingegaard, qui occupent actuellement les trois premières places du classement général de la Vuelta.
rmcsport.bfmtv.com
VIDEO - Dans les Grandes Gueules du Sport ce dimanche sur RMC, Jérôme Pineau explique pourquoi il suspecte la formation Jumbo-Visma de "dopage mécanique". Sepp Kuss, Primoz Roglic et Jonas Vingegaard occupent actuellement les trois premières places du classement général de la Vuelta.
rmcsport.bfmtv.com
That's quite a claim (certainly from someone who was in the peloton until recently). I think the part which damages his speculative theory the most (other than the obvious lack of evidence) is the fact he said Sepp Kuss shouldn't be able to accelerate & drop 'top riders' like Ayuso, Soler & Uijtdebroeks the way he did on the Tourmalet on Friday.
Two of those riders were still wearing diapers when Kuss was flying up Loze & the Angliru back in 2020, whilst the third (Soler) is not a known climbing GOAT. I think before publicly making such comments, a little homework should be done first (namely don't exaggerate the worth of xyz riders in order to magnify the 'implausibility' of their rival's performance).