Advertise on Bikeforums.net



User Tag List

Results 1 to 9 of 9
  1. #1
    Junior Member
    Join Date
    Dec 2007
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    New Bike - Rusty Brake discs??

    Hi All

    I've noticed rust has quickly appeared on my brake discs, I'v only had the bike a week!

    Is there something I need to apply to the discs to stop them from rusting?

    Help appreciated!

  2. #2
    use your best eye kenhill3's Avatar
    Join Date
    Mar 2006
    Location
    Olympia, Washington
    My Bikes
    '75 Bertin, '93 Parkpre Team 925, '04 Kona King Kikapu, '05 Bianchi Vigorelli
    Posts
    3,054
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by temple-lobe View Post
    Is there something I need to apply to the discs to stop them from rusting?
    Yes, apply the brakes while you ride the bike and the pads will abrade the rotors and take them down to bare metal.

    DO NOT apply any substances to the rotors.

    As I said, the pads will 'clean up' the rotors with use. Any other rust or corrosion on the rotors should not affect performance.

    If you you really have a need to make your rotors look nice, remove them from the wheels and clean them up with medium/fine steel wool. Don't forget to blow away all traces of the steel wool.
    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

  3. #3
    Senior Member Sci-Fi's Avatar
    Join Date
    Sep 2006
    Posts
    1,250
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yep...it's normal...when you use your brakes, it'll all come/wear off, just like a car's disc brake rotors.

    If it really bothers you, then buy a can of "3M 16-501 Zinc Spray" (~$8.00). Remove and Clean your rotors of rust and spray it on. Whatever surfaces the pads doesn't contact will be protected...the surfaces where the pads contact will wear the coating off and that's the only place where you will see any rust form (if you don't ride often). The Zinc coating will act as a barrier and sacrificial layer and should last for a long time. Many performance aftermarket "car rotors" are zinc coated, so it not like it hasn't be done before.
    Last edited by Sci-Fi; 12-18-07 at 10:45 AM.

  4. #4
    Junior Member
    Join Date
    Dec 2007
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi - Thank you for help guys.

    Yeah, I ride 3 times a week so I think I'll try that zinc spray you mentioned.

    Andy

  5. #5
    RT
    RT is offline
    The Weird Beard RT's Avatar
    Join Date
    May 2005
    Location
    COS
    Posts
    8,528
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Hey fellas - just stopped in to see what's up and was wondering if when you say no substances whatsoever, if that includes alcohol? I use it to clean crud off my rotors during weekly maintenance. I've never had the rust issue (just dirt and grit) and ride in the rain often.

  6. #6
    Senior Member sprockets's Avatar
    Join Date
    Jul 2002
    Location
    Toronto, Ontario
    Posts
    161
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I also use rubbing alcohol, ride in rain and what have you and never get rust on my disc brakes. A bit of rubbing alcohol to clean them off as soon as I get the bike inside seems to go a long way.
    *************************
    As god as my witness, I thought turkeys could fly

  7. #7
    Riding Heaven's Highwayson the grand tour
    Join Date
    Sep 2007
    Location
    Tehachapi Mtns, Calif.
    My Bikes
    '10 C'Dale Tandem RT2. '07 Trek Tandem T2000, '10 Epic Marathon MTB, '12 Rocky Mountain Element 950 MTB, '95 C'dale R900, "04 Giant DS 2 '07 Kona Jake the Snake, '95 Nishiki Backroads
    Posts
    737
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've used alcohol as a cleaning agent on rotors as well and never a problem.

    Bill J.

  8. #8
    Senior Member Sci-Fi's Avatar
    Join Date
    Sep 2006
    Posts
    1,250
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Toddorado View Post
    Hey fellas - just stopped in to see what's up and was wondering if when you say no substances whatsoever, if that includes alcohol? I use it to clean crud off my rotors during weekly maintenance. I've never had the rust issue (just dirt and grit) and ride in the rain often.
    Obviously you don't want any grease or oil on your rotors. Alcohol should be fine. A lot of people remove their pads if they are going to use a solvent or water-based cleaning agent/solution to clean their rotors and/or calipers...the reason behind it is that nobody knows what short or long term effect a solvent or cleaning solution will have on the pad braking material or the bonding agent that adheres the pad to the backing plate. Shouldn't be a big deal to pull the pads, most will adjust their brakes after cleaning anyways and it's always good to check the pad thickness/wear and replace when necessary.

  9. #9
    use your best eye kenhill3's Avatar
    Join Date
    Mar 2006
    Location
    Olympia, Washington
    My Bikes
    '75 Bertin, '93 Parkpre Team 925, '04 Kona King Kikapu, '05 Bianchi Vigorelli
    Posts
    3,054
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sorry if I inferred 'no substances of any kind'. Those such as alchohol that go away or evaporate should be fine.

    Added note- You can clean disc pads on the flat with fine grade sandpaper, don't overdo it. Mechanics in Moab showed this to me when I wanted to get rid of squeal.
    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •