Home Vision World Multimedia On board with EF: #1 - Metron 45 SL Disc 15 Apr 2021 On board with EF: #1 - Metron 45 SL Disc Mission accomplished. Team EF Education-Nippo takes new Metron wheels at this year's Tour de France. The team is currently using Metron 45 SL Discs. Each time they use them, they know that they're using the best technology out there — and also getting the smoothest ride possible.