must buy options:
front universal joint HK$9xx
rear light weight wheel axle HK5xx
rear axle washer HK$2xx to use with light weight wheel axle
brake disc HK$1xx
brake pad HK$1xx
full set metal pulleys HK$xxx
may buy options:
metal handle stand HK$3xx
front metal anti-roll bar mount HK$3xx
Light weight middle shaft HK$???
Light Weight 2-speed Shaft HK$???