Patented fork seal features a balanced 3 lip design that evenly distributes the pressure reducing operating temperature wear and friction. Custom Elastomer Fork Seals have been tested to outlast OEM fork seals. Extends typical seal life by 3 to 5 times over OEM seals. Stiction (friction) measures from 1/3 to less than OEM seals for smoother fork action. Lower Stiction Longer Life! It doesn't get any better than this! Plus the Only complete line of Dust Wipers! Wipers should be replaced with the fork seals to assure peak performance.Quality design and construction of every All Balls piece meets the toughest standards and conditions - from daily commuting to full-on racing all older bearing and seal designs are upgraded to the best and latest specs and designs. Fits: BMW R100/7 1977-1978 R100CS 1980-1984 R100RS 1976-1984 R100RT 1978-1984 R100S 1976-1980 R45 1978-1985 R50/5 1969-1973 R60/5 1969-1973 R60/6 1973-1976 R60/7 1976-1980 R65 1978-1985 R65 GS 1987-1992 R65 LS 1982-1985 R80 1977-1980 R80/7 1976 R80GS 1980-1987 R80RT 1982-1984 R80ST 1980-1986 R90S 1969-1976