Page 1 of 2 1 2 LastLast
Results 1 to 25 of 26
  1. #1
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    18

    WD-40 on disc brakes

    So after a very wet and muddy ride I hosed down my bike and sprayed down the chain, derailers, etc with wd-40.

    I mistakenly sprayed the rear disc with wd-40 and now the brakes are slow to stop. Obviously this will wear off after use but is there any quick way to clean the discs/pads?

  2. #2
    mtbr member
    Reputation:
    Join Date
    Jan 2011
    Posts
    10
    First of all, never, ever,ever use WD 40 on your bike. It is only a lubricant and will actually help rusting. Only use chain lube designed for bikes. It comes in a small bottle so no chance of over spray. OK rant over !! Best way to clean up is to use Jiff or similar slightly abrasive cleaner. This is only way, believe me I have tried everything else. Gently clean discs and pads with Jiff on a damp cloth and rinse with fresh water.

  3. #3
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    18
    Quote Originally Posted by gardcol View Post
    First of all, never, ever,ever use WD 40 on your bike. It is only a lubricant and will actually help rusting.


    I think you should smack whoever told you that.....

    WD-40 was specifically made to displace moisture and prevent corrosion. I only used it after hosing down the bike to take out any moisture on the metal parts....but made the mistake of over spraying onto the disc.

  4. #4
    mtbr member
    Reputation:
    Join Date
    Jul 2008
    Posts
    327
    Fair warning - you may need to replace your pads. You can try chemicals or light sanding to try to decontaminate the pad surface, but it may not be enough.

    @gardcol - I think you meant "Jiffy", not "Jiff".

  5. #5
    mtbr member extraordinair
    Reputation: Stupendous Man's Avatar
    Join Date
    Jan 2004
    Posts
    922
    Quote Originally Posted by gardcol View Post
    First of all, never, ever,ever use WD 40 on your bike. It is only a lubricant and will actually help rusting. Only use chain lube designed for bikes. It comes in a small bottle so no chance of over spray. OK rant over !!

    First of all, dont believe all the ranting and mis-information being spewed all over bike forums about WD40. It is a very effect chain cleaner/degreaser, and is perfectly safe to use around bikes. You do need to be careful with it though, to avoid overspray near your brakes.

    You can wipe the rotors with alcohol pads to clean them. Your brake pads may need a few applications of alcohol wipes and sanding to get the residue off. Then you may just have to play a waiting game of letting it burn itself out. Some will recommend torching them or baking them, but I wont. I'd just replace the pads before doing that.
    Grit, spit, and a whole lot of duct tape!

  6. #6
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    18
    Ill get some rubbing alcohol and give them a good scrub.

    Thanks

  7. #7
    mtbr member
    Reputation:
    Join Date
    May 2006
    Posts
    11,333
    Old Fry pan medium heat...lightly sand

  8. #8
    mtbr member
    Reputation:
    Join Date
    Oct 2006
    Posts
    2,621
    This comes up every couple of days. Here is a recent thread that pretty well represents the typical range of "fixes"...Oil on pads
    Last edited by gmcttr; 09-26-2011 at 10:08 AM.

  9. #9
    Class Clown
    Reputation: dundundata's Avatar
    Join Date
    May 2009
    Posts
    1,635
    I'm gonna have to agree that spraying WD40 all over your bike is not a good idea. If you want to remove the chain or other parts and use it maybe but this thread proves it's not the best option.

  10. #10
    AZ
    AZ is offline
    banned
    Reputation: AZ's Avatar
    Join Date
    Apr 2009
    Posts
    19,996
    ......

  11. #11
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    18
    Yeah so I took the disc pads off and scrubbed them with soap and hot water...

    They work perfect now. I think a lot of people overthink things sometimes.....wd-40 is fine to use, just avoid overspray.

  12. #12
    mtbr member
    Reputation: mack_turtle's Avatar
    Join Date
    Jan 2009
    Posts
    3,099
    Why WD-40 is Bad for Your Bike Chain - Bicycle Tutor Video

    the only thing that wd-40 works well on bikes is to install rubber grips on your bars. really, try it! it evaporates quickly like hairspray does and leaves the grip sticky on the bar.

    otherwise, I think you are going to pay stupid tax if you use wd-40 on your bike. if you can "bake" the oil out, that might work. otherwise, you need new pads. take the rotors off and clean them with warm water and dish soap, then wipe them up with rubbing alcohol.

  13. #13
    mtbr member extraordinair
    Reputation: Stupendous Man's Avatar
    Join Date
    Jan 2004
    Posts
    922
    Holy carp!

    mack_turtle just demonstrated my point about regurgitating misinformation and unproven "facts" from the internet.

    Try using WD40 to install your grips. I dare ya...
    Grit, spit, and a whole lot of duct tape!

  14. #14
    ballbuster
    Reputation: pimpbot's Avatar
    Join Date
    Dec 2003
    Posts
    12,643

    Yeah, srsly

    Quote Originally Posted by Stupendous Man View Post
    Holy carp!

    mack_turtle just demonstrated my point about regurgitating misinformation and unproven "facts" from the internet.

    Try using WD40 to install your grips. I dare ya...
    I use 91% Isopropyl alcohol... just a dab. Nothing else. That was before I switched to clamp on Ergon grips.

    *edit*

    I forgot to mention block off the ends of the bars in some way and the end of the grip and use the air pocket that forms under the grip to help you slip them on.

    still... I keep WD40 away from my bike. I'm not sure it does any damage, but it certainly doesn't do any good... except when I have my fork innards apart for cleaning.

    In fact, aerosol propelled anything is a bad idea around bikes. Too many things that can get messed up if contaminated by whatever, and now you're shooting it around like a shotgun. Half of the product you are trying to apply ends up on the shop floor anyway.
    Last edited by pimpbot; 09-27-2011 at 03:57 PM.

  15. #15
    mtbr member
    Reputation: mack_turtle's Avatar
    Join Date
    Jan 2009
    Posts
    3,099
    Quote Originally Posted by Stupendous Man View Post
    Try using WD40 to install your grips. I dare ya...
    I am speaking from 15 years of experience, not regurgitated facts from the internet.I always do, it works fine. I have Ergons now, so they bolt on, but my bmx bike and every other bike I have ridden used hair spray or wd-40 to install the grips and they dry in about an hour and don't slip. Tom the owner of Empire BMX swears by it. try it, I dare ya.

  16. #16
    AZ
    AZ is offline
    banned
    Reputation: AZ's Avatar
    Join Date
    Apr 2009
    Posts
    19,996
    Quote Originally Posted by Stupendous Man View Post
    Holy carp!

    mack_turtle just demonstrated my point about regurgitating misinformation and unproven "facts" from the internet.

    Try using WD40 to install your grips. I dare ya...




    It works, if you don't believe it try it. That said, that is the only thing bicycle related that I will use WD 40 for.

  17. #17
    mtbr member
    Reputation:
    Join Date
    May 2006
    Posts
    11,333
    Quote Originally Posted by AZ.MTNS View Post
    It works, if you don't believe it try it. That said, that is the only thing bicycle related that I will use WD 40 for.
    Chain cleaning off the bike.

    Removing tar from the frame

    Cleaning and drying shifter pods.

    Cleaning bearing parts once the seals are out of the way.

    Lots of vaild uses...I use the squeeze to squirt bottle, not the aerosol.

  18. #18
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    346
    Whatever valid uses WD40 may (or may not) have on a bike, we definitely should be careful not to use it as a lazy man's solution to cleaning/lubricating/etc. Using it where another lubricant was intended is probably not the best way to care for our bikes (i.e. rear derailleur).

  19. #19
    mtbr member
    Reputation:
    Join Date
    Sep 2011
    Posts
    18
    I only used wd-40 to displace the water after I hosed it down after a very muddy ride.

    Once it all dried I lubed the chain with bike specific lube.

  20. #20
    mtbr member
    Reputation: Metalhack's Avatar
    Join Date
    Aug 2011
    Posts
    313
    Quote Originally Posted by rykaz View Post
    So after a very wet and muddy ride I hosed down my bike and sprayed down the chain, derailers, etc with wd-40.

    I mistakenly sprayed the rear disc with wd-40 and now the brakes are slow to stop. Obviously this will wear off after use but is there any quick way to clean the discs/pads?
    Pull the brake pads off and also the rotors. Grab a propane or mapp gas torch and heat the pads up. While still hot spray some water on the pads so they sizzle. Do this a few times. This will decontaminate the pads. Do the same to the rotor but just wave the flame at the rotor enough to burn off any decontaminate then splash with water. Your brakes will work better than ever. I do this to all my new pads.

    This is a trick I saw being done at a World Cup DH. I tried it and was shocked.

  21. #21
    mtbr member
    Reputation:
    Join Date
    Sep 2007
    Posts
    3,332
    WD40 is used as a water displacer, although it is ofcourse oil it's to thin and evaporates quickly, if you apply it right before a ride on a cold day then it might stay around for a ride but not 2.

    It's a good cleaning aid to as it breaks down heavier oils and grease.

    Keep it out of bearings though cause bearings + grease = no grease.

  22. #22
    mtbr member
    Reputation:
    Join Date
    Oct 2006
    Posts
    2,621
    Quote Originally Posted by rykaz View Post
    I only used wd-40 to displace the water after I hosed it down after a very muddy ride.

    Once it all dried I lubed the chain with bike specific lube.
    You now know why it is best not to bring up the subject of WD-40 on these forums.

    Welcome to mtbr.

  23. #23
    mtbr member
    Reputation: Wheelspinn's Avatar
    Join Date
    Aug 2011
    Posts
    179
    wd40 is a water displacer and a solvent in my opinion. Iv used it to wash grease out of bearings during cleaning. great for cleaning chains and sprockets before relubing with proper lube. Wont cause rust but if the conditions are wet it wont prevent it for long either. ....The absolute best after wash water displacer and anti corrosive/ shiny detailer? Maxima SC1 silicone detailer. Use lightly, NEVER get it on the rotors or pads
    If it's not one thing it's your mother

  24. #24
    mtbr member
    Reputation: Wheelspinn's Avatar
    Join Date
    Aug 2011
    Posts
    179
    P.S. SC1 preserves rubber. it will keep tires from cracking, keeps master cylinder dust boots from drying out. It also keeps paint from oxidizing and is safe for anodized surfaces, fork tubes and shock shafts. Next time you wash your bike it will clean up easier because dirt has a hard time sticking to it, its Anti static and collects less dust and lubricates better then WD also. Its a motorcycle detailer, iv been using it for years. I promise you will be impressed as long as.....YOU DONT GET IT ON YOUR BRAKES. (or seat and grips)
    If it's not one thing it's your mother

  25. #25
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    346
    I am no expert, but whenever I talk to someone knowledgeable on such issues (whether it be for a bicycle or otherwise) and the subject of WD40 comes up, there is almost always something better for the specific job. I'm not suggesting never to use WD40, but rather encourage the use of the best product for any particular job.

Page 1 of 2 1 2 LastLast

Similar Threads

  1. Funn Disc Brakes=Hayes Disc Brakes?
    By hardtailkid in forum Brake Time
    Replies: 2
    Last Post: 07-08-2012, 06:27 PM
  2. Real weight advantage of V-brakes over Disc Brakes
    By sergio_pt in forum Weight Weenies
    Replies: 20
    Last Post: 11-26-2009, 07:50 PM
  3. Replies: 37
    Last Post: 03-29-2006, 03:44 PM
  4. Replies: 6
    Last Post: 03-01-2006, 11:29 AM
  5. Replies: 21
    Last Post: 01-09-2006, 06:05 PM

Posting Permissions

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