Ratio nominal de transmission : 8 10 12.5 16 20 25 31.5 40 50
Signification du nom de code : W H T X S C cochile, arc, passage, bas, haut, côté
Distance au centre : 42 65 80 100 120 125 150 160 180 200 210 250 280 300 320 360 400 420 450 500

WHT42, WHT65, WHT80, WHT100 WHX120, WHX125, WHX150, WHX160, WHX180, WHX200, WHX210, WHX250, WHX280, WHX300, WHX320, WHX360, WHX400, WHX420, WHX450, WHX500 WHS120, WHS125, WHS150, WHS160, WHS180, WHS200, WHS210, WHS50, WHS280, WHS300, WHS320, WHS360, WHS400, WHS420, WHS120, WHS450, WHS500 WHC120, WHC125, WHC150, WHC160, WHC180, WHC200, WHC210, WHC50, WHC280,