Well this MOC by Julie vanderMeulen makes me wanna lace up my skates and get on the track! These 1:1 scale Riedell R3's use a combination of standard LEGO bricks and Bionicle pieces. Roller derby players agonise over sourcing the right components and settings for their skates, and Julie looks like she's done just the same for this pair, which are kitted out in her Hammer City Roller Girls colours. Unsurprisingly one of the most important elements of the skates are the wheels, and players use a combination of durometers to optimise performance - this can be seen with the use of different colour wheels on this build.
You can see me in action in my Riedell She Devils in the bottom pic. Keep calm and skate left!