The Rollerblade Fusion X7 frame is a solid aluminum frame with big wheels (90MM) and fast bearings (SG9). This crazy frame is UFS and it can fit on to any aggressive UFS skate. This is what every aggressive skater needs. Don't hesitate, get yourself a pair and you will feel like a little kid again, fun times guaranteed. The complete set of frames is sold with all the necessary hardware to fit your aggressive skates. Features: 8 90MM / 84A Rollerblade wheels. 16 SG 9 bearings. One size fits all