1. Introduction
The Thule XADAPT8 Adapter Kit is an essential component for securely mounting your Thule 598 Criterium or Thule 597 bike carrier onto Thule Xsporter, Rapid Aero, or Aeroblade/Aeroblade Edge load bars. This kit provides the necessary hardware to ensure a stable and safe connection, allowing for reliable transportation of your bicycles.
2. Product Overview
The XADAPT8 kit consists of specialized bolts designed to fit into the T-track channels of compatible Thule load bars. These bolts replace the standard mounting hardware that comes with the bike carrier, which may not be suitable for the wider profile of Xsporter or Aero bars.

Image: Two Thule T-track bolts, one longer and one shorter, used for securing bike carriers to load bars.
2.1 Package Contents
- Thule XADAPT8 Adapter Bolts (various lengths as required for specific carriers)
- Installation Instructions (this manual)
3. Compatibility
This adapter kit is specifically designed for use with the following Thule products:
- Bike Carriers: Thule 598 Criterium, Thule 597
- Load Bars: Thule Xsporter, Thule Rapid Aero, Thule Aeroblade, Thule Aeroblade Edge
Ensure your bike carrier and load bars are listed above to guarantee proper fit and function.
4. Setup and Installation
Follow these steps to install the Thule XADAPT8 Adapter Kit and mount your bike carrier:
- Prepare Load Bars: Ensure your Thule Xsporter, Rapid Aero, or Aeroblade load bars are correctly installed on your vehicle according to their respective manuals.
- Remove Existing Hardware: If your Thule 598 Criterium or 597 bike carrier has existing mounting hardware for square bars, remove it. Refer to your bike carrier's manual for specific instructions on removing its original mounting system.
- Insert Adapter Bolts: Slide the Thule XADAPT8 adapter bolts into the T-track channel located on the top of your load bars. Position them to align with the mounting points on your bike carrier.
- Attach Bike Carrier: Place your Thule bike carrier onto the load bars, aligning its mounting holes with the inserted adapter bolts.
- Secure Carrier: Use the provided nuts or knobs (from your bike carrier's original hardware, if applicable, or new ones if included with the adapter) to firmly secure the bike carrier to the adapter bolts. Tighten all fasteners until the carrier is snug and does not move. Do not overtighten.
- Final Check: Before driving, gently shake the bike carrier to ensure it is securely attached to the load bars. All connections should be firm and free of excessive movement.
Always refer to the specific instructions provided with your Thule bike carrier for detailed mounting procedures and safety guidelines.
5. Operating Instructions
Once the Thule XADAPT8 Adapter Kit is installed and your bike carrier is securely mounted, the operation of your bike carrier remains as described in its dedicated user manual. The adapter kit's function is solely to provide the correct interface between the bike carrier and the specific load bar types. Always ensure your bike is properly secured in the carrier before transport.
6. Maintenance
To ensure the longevity and safe operation of your Thule XADAPT8 Adapter Kit, perform the following maintenance:
- Regular Inspection: Periodically check all bolts and connections for tightness, especially after initial installation and before long trips.
- Cleaning: Clean the adapter components with mild soap and water. Avoid harsh chemicals that may damage the material.
- Storage: If removing the bike carrier and adapter for storage, keep all components together in a dry place.
7. Troubleshooting
- Bike Carrier Does Not Fit:
- Verify that your bike carrier is a Thule 598 Criterium or 597 model.
- Confirm your load bars are Thule Xsporter, Rapid Aero, or Aeroblade/Aeroblade Edge.
- Ensure the adapter bolts are correctly inserted into the T-track channel.
- Loose Connection:
- Re-tighten all mounting bolts and nuts.
- Inspect bolts and load bar channels for any obstructions or damage.
If issues persist, contact Thule customer support for assistance.
8. Specifications
| Model Name | XADAPT8 |
| Part Number | XADAPT8 |
| Item Weight | 1.6 ounces (0.045 kg) |
| Item Dimensions (LxWxH) | 12 x 6 x 2 inches (30.5 x 15.2 x 5.1 cm) |
| Material | Other (specific material not detailed) |
| Included Components | Bolts |
9. Warranty and Support
The Thule XADAPT8 Adapter Kit comes with a Limited Warranty. For specific details regarding warranty coverage, terms, and conditions, please refer to the warranty information provided with your original Thule product purchase or visit the official Thule website.
For technical support, replacement parts, or further inquiries, please contact Thule customer service through their official website or authorized dealers. When contacting support, please have your product model (XADAPT8) and any relevant purchase information available.