SRAM G2 Ultimate Service Manual page 13

4 Squeeze the brake lever to advance the pistons until they contact the
pad spacer.
5 Use a T25 TORX wrench to remove the banjo bolt.
6 Remove the pad spacer.
Remove the pad retention bolt.
2.5 mm 20 mm or 15 mm Thru Axle
2.5 mm
Caliper Piston Removal 13