stand for standard bmxracing track ,most own by local goverment , if you want to ride there you may contact us first , we will try to help you ! 

代表标准的BMX RACING泥地竞速赛道，大部分由当地政府所有，如果你想在那里骑行，你可以先联系我们，我们会尽力帮助你！

stand for some pumptrack and small track own by our dealer , you can go directly on your own !

代表一些由我们的经销商拥有的pumptrack和小型场地，您可以直接自己去！