Kuyambira m'ma 1970, njinga zamtundu watsopano zidawonekera pamsika, zomwe zikufalikira m'chikhalidwe chodziwika bwino ngati mphepo yamkuntho ndikupatsa anthu mamiliyoni ambiri padziko lonse lapansi (makamaka achichepere.njingadrivers) mwayi woyendetsa njinga zawo mwanjira yatsopano.Awa anali BMX (afupi a "njinga yamotocross"), njinga zomwe zidapangidwa koyambirira kwa 1970s ngati njira yotsika mtengo komanso yosavuta yamotocross, masewera otchuka omwe adapereka lingaliro kwa woyendetsa njinga waku Southern California kuti asinthe njinga zawo ndikupanga njinga zopepuka komanso zosunthika. zomwe zingagwiritsidwe ntchito mosavuta m'matauni komanso m'malo onyansa.Zochita zawo zosinthira zidayang'ana pa njinga yopepuka komanso yolimba ya Schwinn Sting-Ray, yomwe idakulitsidwa ndi akasupe abwinoko komanso matayala amphamvu.Njinga zoyambilira za BMXzi zinkatha kuyendetsedwa mwachangu kudera la motocross ndi njanji zomangidwira zolinga, zidule, ndipo zidali chidwi cha achinyamata aku California omwe adawona kuti njingazi zinali njira yabwino kuposa njinga zamoto zodula.
Kutchuka kwa njinga zoyambilira za BMX kudaphulika ndi kutulutsidwa kwa kanema wothamangitsa njinga zamoto mu 1972 "Pa Lamlungu Lililonse", zomwe zidalimbikitsa achinyamata ku United States konse kuti ayambe kupanga mawonekedwe awoawo amoto-njinga zapamsewu.Posakhalitsa, opanga njinga adalumphira pamwambowu kuti apereke mitundu yatsopano ya BMX yomwe posakhalitsa idakhala mphamvu yamasewera oyendetsa njinga zamoto.Mabungwe ambiri adapangidwanso kuti aziwongolera masewera a njinga zamoto, kuyambira ndi National Bicycle League yomwe idakhazikitsidwa mu 1974 ndi ena ambiri omwe adapangidwa pambuyo pake (National Bicycle Association, American Bicycle Association, International BMX Federation, Union Cyclist International ...).
Kuphatikiza pa kuthamanga, madalaivala a BMX adatchukanso zamasewera oyendetsa mwaulere a BMX, zidule zosinthiratu, ndikupanga masitayelo apamwamba omwe masiku ano amasangalatsidwa ngati masewera apawailesi yakanema omwe amatsogolera zochitika zambiri za Extreme Sporting.Munthu yemwe adayamba kutchuka zamasewera a BMX Freestyle ndi Bob Haro, yemwe adayambitsa kampani yopanga njinga zamtundu wa Mountain ndi BMX Haro Bikes.
Njinga za BMX lero zapangidwa kuti zigwirizane ndi mitundu 5 ya zochitika zogwiritsira ntchito:
- Paki- Yopepuka kwambiri komanso yopanda zowongolera zamapangidwe
- Dothi- Zosintha kwambiri panjinga za Dirt BMX ndi matayala awo okulirapo omwe amakhala ndi dothi lokulirapo.
- Flatland- Mitundu yabwino kwambiri ya BMX yomwe imagwiritsidwa ntchito popangira zidule ndi machitidwe.
- Mpikisano- Mabasiketi a BMX othamanga ali ndi mabuleki owonjezera komanso ma sprocket akulu akutsogolo kuti akwaniritse kuthamanga kwambiri.
- Msewu- Ma BMX olemera omwe ali ndi zikhomo zachitsulo zofalikira kuchokera ku ma axle, zomwe zimathandiza madalaivala kuwaponda panthawi yamisala ndi machitidwe.Nthawi zambiri alibe mabuleki.
Nthawi yotumiza: Jul-07-2022