The Rollerblade Wheels Axles 2.0 for ALUminum Frames are meant to be replacement axles for a good chunk of the Rollerblade skates having aluminum frames such as the Macroblade Series, XL, and Maxxum Skates (not the Maxxum 125). 
 
These are two-piece 8mm axles.  Should they be out of stock, the Sonic 8mm Extender Axle works great. They do not countersink to be flush with the frame, but fasten perfectly and securely otherwise. 
 
Compatibility:

• • Maxxum Edge, Maxxum XT, Maxxum
    • Not the Maxxum 125 (Uses the Rollerblade One-Piece Race Axle)
  • Macroblade 80/84/90/100/110
  • RB and XL
  • Igniter 90/100
  • Item#: 09201900000 (formerly 092022000001)
• Includes:
  • Eight (8) Regular Axles;  One (1) Brake Axle
  • 8mm Two-Piece
• Length: Approx 29mm (not including screw head)

• Maxxum Edge 90
• 2015 Macroblade 84/90/100 (Men's or Women's)
• 2014/2015 Maxxum 84/90/100
• 2013/2014 Igniter 100 (Men's or Women's)
• 2013 Crossfire 90 & Activa 90
• RB100/90
• Tempest 90 (including 2015 models)
• 2013 Spark 84
• 2013/2014 Spark 80 ALU
• XL
• Aero 09