Here in Iran our style of trials riding is more like enduro, the mountains we got here are huge, vertical with loose dirt, the cross riders go up much easier than we do, we tend to sink in the dirt and get stuck half way, so in my case is it a good idea to put moto cross tires in the back, for better climbing in loose sandy dirt?
By the way, are we greatly reducing the life spam of our trials bike, by constantly maxing out the throttle, and doing enduro type riding?