Freego eBike Hydraulic Brake Mineral Oil & Syringe Kit

A bleed kit for hydraulic disc brakes, containing mineral oil and a syringe. Spongy lever feel is almost always air in the line rather than worn pads, and a bleed restores the firm bite without touching any other part of the brake.

The syringe is sized for pushing fluid through a bike caliper and up to the lever, which is the direction that carries trapped air out of the system. Freego lists this as a universal accessory rather than a model-specific part. Confirm your brakes run mineral oil before using it, because the two common bike brake fluids are not interchangeable and mixing them attacks the seals.