Editing TT scale (section)

==Track systems==
There are several track systems available in the scale. Tillig offers two different tracks: with track bed and without. The latter system is considerably more developed, while the former has a more limited choice but comes with two different kinds of track bed. Most TT modellers use one of these two, partially because of the widespread availability. The smallest recommended turn radius is 310{{nbsp}}mm, but track with tighter curves, 267{{nbsp}}mm, is available. Most rolling stock, however, is designed to work on the 310{{nbsp}}mm curves, and might not work on smaller radii.

German manufacturer Kuehn offered a track system which is now marketed by Roco. The geometry differs slightly from Tillig's system, but the two are compatible although with some minor differences. 

[[File:TT scale track from Tillig (left), Kuehn (middle) and Hornby (right).jpg|thumb|TT scale track from Tillig (left), Kuehn (middle) and Hornby (right).]]

With Hornby's entry into the scale in 2022, a completely new track system was launched. While having its own distinct appearance, the geometry is in most aspects the same as Tillig's track.

There are several other track systems on the market, although with smaller choice of track pieces. German TTFiligran offers very delicate fine-scale track, and the old, u-shaped track of Berliner TT Bahnen is still available used in large quantities. Czech manufacturer DK-Model also offers a limited range of TTe narrow gauge track, consisting of points and flexible track. Moreover, the British manufacturer PECO introduced Streamline Flexible Track and Medium Radius Turn-Outs with code 55 rail in June 2022.<ref name=":0" />