My cargo bike has SRAM brakes. All my other bikes have Shimano.
Cargo bike has a sticky piston. Using mineral oil to lube that sticky piston is going to be fine, right?
Most SRAM uses Dot fluid, not mineral. Check yours via Google, and if the system uses Dot fluid, only lube the sticky piston with Dot fluid.
Sorry just seen this, I have red rubber grease if you still need some.
EDIT If any one wants some red rubber grease, can give some in a packet or syringe for forum donations.
@Eejit started
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My cargo bike has SRAM brakes. All my other bikes have Shimano.
Cargo bike has a sticky piston. Using mineral oil to lube that sticky piston is going to be fine, right?