>>1744095>the only maintenance is pad and disc replacementBrake bleed once or twice a year, which is $40+parts here according to the LBS's website or you can buy all the fluids and tools yourself and spend an afternoon fucking around with hoses and syringes and shit.
https://support.sram.com/hc/en-us/articles/226404307-How-often-should-SRAM-HRD-brakes-be-bled-as-part-of-a-regular-maintenance-schedule- 