wide rims are less susceptible to burp when riding tubeless.increase the tire size,allowing you run the rims with lower tire pressure.
Importantly,Wider rims provide better traction,lower rolling resistance,more comfortable ride and no pinch flat,especially in Hookless rims version.
GTL-BIKE design the 30mm/35mm external width 29er and 30/35mm external width 27.5er MTB carbon rims,available in Clincher or Hookless.
Then 29er 35mm hookless is the heaviest MTB carbon rims in GTL-BIKE,,reach the balance of weight,stiffness and durablity in various test,clincher or tubeless compatible.
29er 25mm/28mm width Clincher is the lighest 29er carbon MTB rim GTL made,it is light and stiff,25mm/28mm outer rim with should be your choice for MTB XC and racing speed.