Which Type of Axle Do I Have on My Tacx Trainer?

Tacx direct-drive trainers come in two different axle types:

Type 1: 6 mm or 9 mm internal diameter axle hole suitable for a quick-release skewer.  Adapters allow for a thru-axle bike to be installed onto the trainer using a quick-release skewer.

Type 2:  12 mm internal diameter axle hole suitable for using a bike's thru-axle. Adapters allow the use of a quick-release skewer as well.

How do I determine which type of axle my trainer has?

Type 1 trainers:

• NEO Smart
• NEO 2 Smart
• FLUX Smart
• FLUX S Smart*
• FLUX 2 Smart*

Type 2 trainers:

• NEO 2T
• FLUX S Smart*
• FLUX 2 Smart*

*FLUX S and FLUX 2 trainers have been manufactured using both Type 1 and Type 2 axles.  You can choose one of the following identification methods to determine which trainer type you have:

• Identify the part number on the cassette body installed on the trainer out of the box:
  • Type 1: T2805.01 (S)
  • Type 2: T2875-01
    
    
• Measure the inside diameter of the trainer axle with the cassette body removed using a caliper tool (pictured below)
  • Type 1: 6mm or 9mm
  • Type 2: 12mm
    
    

Which Cassette Body do I need for my trainer?

Direct-drive trainers come with a SHIMANO/SRAM cassette body out of the box.  If you need a replacement or different cassette body, below are part numbers available for purchase: