Has anyone used a double barrel air on a TRC? If so how does it ride is it worth it ect.

I keep blowing up my RP23 I have on my TRC. It feels good most of the time however on sustained downhills like 4 plus minutes the back end begins to feel stiff due to heat build up.

I am 190 ish in full gear and love the bike apart from the rear shock after a while on the down hill.