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  1. #1
    mtbr member
    Reputation: hrbib21's Avatar
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    Hydraulic Brake Mineral Oil

    What kind of mineral oil is in the Guardian brakes? I assume it isn't the drugstore kind. One of my levers is quite loose, I have to pull it in quite a bit to get it to grab, so I want to do a bleed.

  2. #2
    Airborne Flight Crew
    Reputation: jhazard's Avatar
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    Tektro advises against it:

    "...Tektro disc brakes are designed to be used with only Tektro brand mineral oil. Tektro uses a special additive to increase the temperature range and red color for ease of identification"
    TEKTRO BRAKE SYSTEMS

    While you can probably get away with drug store mineral oil, it's probably not the best practice. You can get an entire bleed kit for less than $15:

    Tektro MTB Hydraulic Disc Brake Bleed OIL Service KIT FOR Auriga Auriga Comp | eBay

    and

    Amazon.com: Tektro Mountain Bike Hydraulic Disc Brake Bleed Oil Service Kit: Sports & Outdoors


    Hope that helps!
    Airborne Flight Crew

    Jerry Hazard website

  3. #3
    mtbr member
    Reputation: UEDan's Avatar
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    If it's anything like Shimano's mineral oil system, DON'T use drug store stuff.
    But at that price for the kit, screw Pentosin have at it.

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