The standard body of a Tacx direct drive trainer is not compatible with all cassettes. Use this body to suit your SRAM XD-R cassette. It’s easy to place, and all you’ll need is a 5 mm hex key.

The SRAM XD-R body is suitable for 11- and 12-speed SRAM XD-R cassettes.

The standard body of a Tacx direct drive trainer is not compatible with all cassettes. Use this body to suit your SRAM XD-R cassette. It’s easy to place, and all you’ll need is a 5 mm hex key.

The SRAM XD-R body is suitable for 11- and 12-speed SRAM XD-R cassettes. This version is used for trainers with Type 2 axles.

Compatible Devices:

• Tacx® FLUX 2 Smart Trainer
• Tacx® FLUX S Smart Trainer
• Tacx® NEO 2T Smart Trainer

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

Tacx direct-drive trainers will come in two different axle types described below.

Type 1 Axle

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 Axle

 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
• NEO 2, Type 2
• FLUX S Smart*
• FLUX 2 Smart*

*NEO 2, 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 axle type your trainer has:

Identify the part number on the cassette body installed on the trainer out of the box:

• Shimano Freehub bodies: Type 1, T2805.01 (S) compared to Type 2, T2875-01
  • 
  • 
• Observe the perimeter surface of the axle endcaps on the trainer, looking for any white letters / numbers identifying the appropriate side for installation and axle diameter x length:
  • Type 1: All black endcap, Quick-release compared to thru-axle: no letters or numbers printed on either cap
  • 
  • Type 2: Quick release caps will be labelled: "QR DS", "QR x 130 NDS" or "QR x 135 NDS". Thru-axle endcaps will be labelled: "12 DS", "12 x 142 NDS" or "12 x 148 NDS".
  • 
• 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:

• Transmits real-time heart rate data over ANT+® connectivity and BLUETOOTH®
• For indoor and outdoor training*
• Receive your heart rate consistently and accurate on your Garmin Device, in the Garmin online training app (e.g. Zwift) or a compatible fitness equipment in your gym.
• It comes with a soft strap that is comfortable and adjustable, and also washable (remove heart rate module first)

• Module: 62 mm x 34 mm x 11 mm
• Strap Length: 63.5 cm to 132 cm
• Weight: 54.4 g
• Water Resistance: 1 ATM*
• Battery: User-replaceable size CR2032 (3 volts)
• Battery Life: Approximately 3.5 years (based on average use of 1 hour per day)
• Operating Temperature: -5°C – 50°C
• Radio Frequency/Protocol: 2.4 GHz ANT wireless communications protocol; BLUETOOTH® Wireless Technology 5.0
• Range: 3 m
• System Compatibility: ANT+, BLUETOOTH

*Does not transmit heart rate data to your device while swimming.