Lots of stuttering, but only in online games.

[Galaxy Hopper]

I just joined srb2Kart, and upon joining an online game I noticed that my frames were dropping down to 4-6 every couple of seconds. After restarting the game, and going into time trials, everything ran fine.

 

[Charonik08]

It’s quite possible that due to the amount of players and or the addons which are loaded to the server are too heavy for your PC, which in this case, means that it’s probably your computer.