Trails bikes don't have USD forks, Why ????

[Usurper]

I was watching the European championship highlights and noticed that even the top trails bikes don't use usd forks... 
In every other form for motorcycle sports they are used, why not here?


ps: I cant remember if they used usd in speedway???

 

[RobCrouch]

 

[Usurper]

 

[Go Big]

 

[Eisbein]

 

[Usurper]

 

[Eisbein]

 

[Go Big]

 

[GRIM]

 

[lecap]