Bearing is packed with heavy duty premium marine grease and with the addition of special complex thickeners which allows it to be virtually waterproof Nitrile butadiene rubber double-lip oil seals help prevent abrasives, corrosive moisture and other harmful contaminants from entering bearings To further help keep any moisture out, we have gone from 30% grease filling to a 60% for harsh conditions The special v-groove on the inner race is better for resistance to water intrusion Provides unsurpassed rust and corrosion protection Factory-Links ball bearings are specially designed for Off-Road use. - Aprilia Pegaso 650 (2000, 2003, 2002, 1998, 2001, 2004, 1999, 1997); BMW F650ST (1998, 1999, 1997); BMW R65 LS (1983, 1984, 1985, 1982, 1981); BMW F650 (1999, 1997, 1998); Suzuki PE 250 (1978, 1977, 1979); Suzuki RM 250 (1978); Suzuki RM 370 (1977); Suzuki RM 400 (1978)