Roller skate has two pairs of wheels in a V shape arrangement double ball bearings, rings, start and stop bars

摘要

The roller skate has 2 large pairs of wheels in a V shaped position. The longitudinal distance between wheels is variable. Each wheel has double ball bearings. The runner rings are renewable and the wheels have large caps. There are four start and stop bars, Cross-country ski boots are integrated and the roller skates can be self-assembled.