I may have a solution for you, but it will depend on the age of the Chariot stroller that you're wanting to convert; unfortunately because it's been quite a long time since Chariot was purchased by Thule they're not able to tell anything from the serial numbers.
If your stroller is relatively new (less than 8 years old), the Jogging Conversion Kit for Thule Chariot Lite or Cross - 1 Child # TH20201301 will work for your Chariot. If your stroller is older than 8-10 years old, Thule no longer... view full answer...
By strolling kit, I believe you are looking for the jogging conversion kit for your Thule Chariot Cross and we do have that for both the 1 child and 2 child Chariot Cross strollers:
- Jogging Conversion Kit for Thule Chariot Lite or Cross - 1 Child # TH20201301
- Jogging Conversion Kit for Thule Chariot Lite or Cross - 2 Child # TH20201302 view full answer...