The MICHELIN Trial Competition at the front and the MICHELIN Trial Competition X11 at the rear will offer you grip and lightness. They are also legal on road. 
it has been the choice of both pros and amateurs for many years.
 
Recommended pressure
Dependent on the terrain, weather conditions, the motorcycle power and the rider’s level of skill.
Front 0.4 bar (6 psi) (min 5 psi)
Rear 0.3 bar (5 psi) (min 4 psi)
 
MICHELIN TRIAL COMPETITION 2.75-21 45M FRONT 
Width
2.75
Rim Size
21
Load Index
45
Speed Index
M
 
MICHELIN TRIAL COMPETITION X11 4.00R18 64M REAR
Width
4.00
Rim Size
18
Load Index
64
Speed Index
M