28 inch bike rim use trekking size 28 inches material aluminium weight 545 g size etrto 622 x 19 series dt swiss tk tyres clincher brake mount rim brake hubs 32 36 maximales fahrergewicht 130 kg maximale speichenspannung 1 200 n empfohlene reifenbreite 28 62 mm rim joint welded ventillochgre 65 mm rim flange wear indicator outer rim width 236 mm inner rim width 19 mm rim height 202 mm technology dt swiss sbwt