Time Trial (often abbreviated as TT) is a gamemode in SuperTuxKart.
It's similar to Normal race, but it doesn't contain powerups, instead players will get as many zippers as the race has laps. Because of this, it is often called less random than other gamemodes. Time Trial also is the gamemode that is used for most speedruns.
There is one Ranked server, HK STK #1 (Ranked) which allows playing Time Trial, though it is used very rarely. Apart from this, there is Frankfurt Speedrun server which also is mostly played in Time Trial, and of course most configurable servers allow setting Time Trial, but it isn't played as much as Normal Race or Soccer.