All the slot cars in this category are 1:32 scale except the Carrera DIGITAL 124 slot cars which are 1:24 scale. The 1:32 slot cars measure approximately 5 3/4 inches long by 2 1/2 inches wide, and the 1:24 slot cars are approximately 7 1/2 inches long by 3 1/2 inches wide. In general, the 1:32 slot cars require a minimum lane spacing of at least three inches (which would have a total track width of six inches), and the 1:24 slot cars require a minimum lane spacing of four inches.
As far as compatibility, all the 1:32 slot cars that we stock are compatible with an analog electric race track such as Carrera, NINCO, SCX and Scalextric. The Carrera DIGITAL 132 & DIGITAL 124 slot cars come with a dual mode decoder for use on both a Carrera DIGITAL track and an analog race car track. Any of the Scalextric DPR ready slot cars can be easily converted to the ARC PRO digital system by installing the Scalextric C8515 EasyFit Digital Plug (sold separately).
Carrera offers a special guide keel for running their cars on a track with a narrower guide slot such as Scalextric. This Carrera special guide keel is usually included in the back of the display base of the Carrera Evolution 1:32 slot cars and is also available separately as part number 85309. Installation is easy since all you do is snap out the original guide keel and then snap in the special guide keel.