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Bormio Ceramic Hybrid Wheels. Need just a little bit more speed? How about Torelli Bormio SL Wheels with Hybrid Ceramic bearings? Torelli's Ceramic wheels have 6 hybrid ceramic sealed bearings. Torelli ceramic bearings use grade 5 Silicon Nitride balls and ABEC 5 ground stainless steel races. Grade 5 balls are made with extraordinary precision, they are within only 5 millionths of an inch from being perfectly round. For comparison sake, the steel ball bearings in Dura Ace hubs are within 25 millionths of an inch from being perfectly round. Their ABEC 5 steel races are, of course, also extremely smooth. To make the whole bearing package perfect, Torelli uses a special grease from Klüber Lubrication that is specifically designed for ceramic bearings that spin at the speeds a bicycle hub turns. The result? A hub that doesn't waste your energy. Bormio Ceramic wheels use triple-butted stainless steel spokes, just as on the Bormio SL wheels. The rims weighs 430 grams. The hubs are laser etched in Silver. Bormio Cermic wheels use 20 radial spokes in the front wheel, 24 spokes in the back. The drive side is laced cross-2 and the non-drive side is radial. As with the Bormio wheels, Skewers and lock rings are not included. Wheelset weight: 1540 grams/ set.
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