28 inch bike rim uses racing bike triathlon size 28 inches material aluminium weight 450 g size etrto 622 x 16 series dt swiss rr tyres clincher brake mount rim brake hub 32 maximales fahrergewicht 110 kg maximale speichenspannung 1 200 n empfohlene reifenbreite 23 35 mm rim joint welded ventillochgre 65 mm rim flange wear indicator outer rim width 21 mm inner rim width 16 mm rim height 21 mm