The Zetrablade has been in Roller blade’s lineup for years, but it has received some updates over the years, and they look better than ever. They are known for incredible support, comfort, quality construction, and reasonable price. Perfect for casual skating, light fitness training, and/or beginning skaters. Its Composite plastic frames reduce vibrations when skating on rough surfaces and add enjoyment to the skating experience. Rollerblade 80mm 82A Wheels with Rollerblade SG5 Bearings. I’m selling due to my back pain, It is getting worst every time I skate.