SCX is fully compatible with scaley classic. Some companys produce converter pieces - Scaley make one that joins sport and classic/scx and ninco make a converter too - not sure what it joins to at the mo, I'll have to do some research.
SCX has a slightly more grip than the old classic stuff though.
There are two manufacturers : Hornby and Technitoys.
Hornby are using the "Scalextric" brand everywhere in the world save in Spain where they use the "Superslot" brand. That's why you simply find "Hornby" on the chassis. Older Hornby cars sold in the US used the "Superscale" brand.
Technitoys are using the "SCX" brand everywhere in the world save in Spain where they use the "Scalextric" brand.
Technitoys and Hornby track are fully compatible.
Their cars are fully compatible, as well as other makes. The only problem you can have is with Carrera on Classic / SCX track.
Theres not much in it, price wise. Many on-line retailers stock both makes. To make this even more difficult, there are other manufacturers out there too that are worth a look! Its best to try out different tracks and see what you prefer.
Just think of Scalextric and SCX track as Scalextric/SCX track.
SCX and Scalextric Classic are fully compatible because SCX was the Spanish Scalextric in another life (Scalextric seems to have had offshoots all around the world in the early days) and commercial buggerising about has ended up with two different manufacturing companies with rights to the same intelectual property (strange but true).
So, Scalextric Sport to Classic converters will work with SCX.
Ergo: (you didn't ask but here goes anyway) to connect Ninco to Scaley Sport you will need a Ninco to Scalextric/SCX converter and a Scaley Classic to Scaley Sport converter.
Everything else that's important (ie cars) will run on all the tracks.
Happy Motoring Customers!
(any old farts from Aus remember this one?)
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