This is one of several major problems with Glennis wheels and brakes. If you use normal pressure (100 psi plus) the Glennis brakes will either (a) lock up (even though Dennis says they won't) or (b) blow the bladder out of the brake.
Anyone seen this one? None of the problems listed here. In fact two air systems with 120psi each and a fully proportional brake valve - just that simple. Stock standard setup, followed the directions, and they hold at full power. These are the types that use the Glennis setup
Dennis