H&R Racing Products Adjustable Wheelbase 1/24 RTR assembled Rolling Chassis - Wheelbase adjustable from 3 5/8" to 4 7/8" (92mm to 123mm) - Includes Hawk 18,000RPM Motor, narrow FOAM Rubber 27x12mm tires all around on setscrew aluminum hubs, Oilite bushings, body mounting kit - Comes with inline motor mount & 48 Pitch Cox axle gearing - recommended for commercial or club track application where tire glue is used 

The adjustable wheelbase allows you to mount almost any 1/24 or 1/25 scale model car body on this chassis to create any kind of slot car you like, from sports cars to stick cars ti street rods and custom cars, and race them on your Carrera or other 1/24 scale slot car track.  The possibilities are endless.