Thank you for viewing! MINOURA rda2024 Fixed Roller Minoura rda2024 Rim Drive With Magriser This is a rim drive fixed roller for small-wheeled bikes such as mini-velos and BMX bikes. It attaches to the rim, so you can train without wearing down your tires. It's a rare item as it's no longer sold by the manufacturer. It has been used and stored indoors, so the condition is good, but there may be parts that are not conveyed in words, so please check the images as well. If you have any questions, please feel free to comment and I will answer them. Thank you. Mini-velo BMX Small wheel bike 20 inch 406 451