CG Slotcars Carrera Guide Adapter (Standard) - approximately 20.0mm diameter. Harry Wise from Home Racing World has put together a helpful video that shows how to determine which size guide adapter you need. Here is the link:
Examples of Carrera cars the Standard Guide Adapter fits:
- Ford GT
- Corvette C7R
- Audi R8 LMS
Package includes two (2) adapters.