Ratio nominale di trasmissione: 8 10 12.5 16 20 25 31.5 40 50
Significato del nome in codice: W H T X S C coccia, arco, passaggio, inferiore, superiore, laterale
Distanza dal centro: 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,