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An F1 hybrid (or filial 1 hybrid) is the first filial generation of offspring of distinctly different parental types. F1 hybrids are used in genetics, and in selective breeding, where it may appear as F1 crossbreed. The term is sometimes written with a subscript, as F1 hybrid.
Eagle F1 Directional 5. Goodyear Eagle F1 Directional 5 takes style and control to a whole new level. Born of racing heritage, new Goodyear Eagle F1 Directional 5 gives you precise handling and responsive grip in challenging conditions. Enjoy style and performance, on the track or on the street.ead More. Goodyear Eagle F1 Directional 5 takes style and control to a whole new level. Goodyear Eagle F1 Directional 5 takes style and control to a whole new level. Born of racing heritage, new Goodyear Eagle F1 Directional 5 gives you precise handling and responsive grip in challenging conditions.