Wheelset bike wheel system uses racing bike triathlon size 28 inches size etrto 622 x 15 series mavic ksyrium weight 1 500 g tyres clincher brake mount rim brake spoke type bladed spokes hubs 18 20 spoke material stainless steel einbauma der hinterradnabe 9 5 x 130 mm fitting dimensions front wheel 9 x 100 mm lacing radial front rim joint welded rim flange parallel type of bearing industrial technologies mavic isopulse mavic fore fabr