In the speed runs can be enable the skins and apareance mods, I think that it can going to be better the experience, obviously I'm exempting the mods like motors or transmissions that can speed up the truck xd, and it is possible put some regulations for the motor and transmission, whit this all can use our favorite truck model for the speed run, pls think it uwu

I appreciate the suggestion, however there is no good reason to accept submissions with mods, and it becomes too difficult to adequately moderate. We would have to have submissions include their enabled mod list, and then also trust that they were not making changes locally to their mods to have any gameplay aspect to them, which is difficult to reasonably determine and prove. There is also the possibility that people may use cosmetics that others may find offensive.

Ultimately this is a leaderboard for runs of the game as delivered by SCS Software. The most we allow is the use of mods to first establish a save with access to all available trucks and equipment, and driver skills - or the use of save game editor to facilitate the same. That is purely in the interest of fairness for the "New Game +" runs. But all runs must be completed under stock game conditions.

In terms of skins and appearance, there is a wide array of cosmetic options within the game, otherwise you could petition SCS to publish additional cosmetic DLC packs.