Mountain biking, sitere na United States, 1974 Gary Fisher, Charlie Kelly, Tom Ritchey chọrọ a kwere omume ụzọ bike nọkwa n'èzí, si "ụgbọala ndị uwe ojii na ụlọ", n'ihi ya, ha malitere iji wụnye akụkụ na ọgba tum tum akụkụ tupu Agha Ụwa nke Abụọ n'ime a otu jupụtara na nkume beach ụgbọ ala ....
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