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Contaminated brake rotor

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Old 05-14-23, 04:02 PM
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bonsai171
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Contaminated brake rotor

Today I was cleaning my cassette with paint thinner, and accidentally got some on the rotor. Is this a contamination concern, and if so, how do I clean it?

Dave
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Old 05-14-23, 04:03 PM
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Originally Posted by bonsai171
Today I was cleaning my cassette with paint thinner, and accidentally got some on the rotor. Is this a contamination concern, and if so, how do I clean it?

Dave
Alcohol
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Old 05-14-23, 04:30 PM
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Originally Posted by Atlas Shrugged
Alcohol
The cause of, and solution to, all of life's problems.
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Old 05-14-23, 04:32 PM
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isopropyl ....the other white meat
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Old 05-14-23, 04:34 PM
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Clean as best you can with a dry paper towel, then isopropanol.

If you really need to clean your cassette, mineral spirits (maybe your paint thinner is this) will do the trick.

(Since I wax my chain, I never need to clean the cassette).
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Old 05-14-23, 06:00 PM
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Originally Posted by Polaris OBark
Clean as best you can with a dry paper towel, then isopropanol.

If you really need to clean your cassette, mineral spirits (maybe your paint thinner is this) will do the trick.

(Since I wax my chain, I never need to clean the cassette).
I have been thinking about switching to wax too, but get stuck in a downpour maybe once a year. Which wax are you using? Was thinking about Silca drip wax, I'm not ready to submerge my entire chain in wax, at least at Silca's prices.

Dave
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Old 05-14-23, 06:22 PM
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I just melt a $1.50 block of paraffin and swirl the chain around in it, but I am sure that the Silca drip would work fine. That is usually good for 10 or so rounds of application (often several chains at once).
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Old 05-15-23, 03:48 AM
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What do you use as paint thinner? if it was to clean/degrease the cassette, then, just rinse the disc/rotor with fresh water and do some rear braking and you should be fine.
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Old 05-15-23, 06:04 AM
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Thanks for the tip on parafin wax, hadn't thought of that. I've heard of people melting the wax in a small crockpot, what do you use? Ideally I'd like to find something a little smaller, but I won't worry to much if it costs a dollar or so at a local goodwill. Just got to find somewhere to put it!

Dave
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Old 05-15-23, 06:16 AM
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Originally Posted by bonsai171
Today I was cleaning my cassette with paint thinner, and accidentally got some on the rotor. Is this a contamination concern, and if so, how do I clean it?

Dave


I've had LIMITED success with alcohol, sanding and other methods but THIS has worked every time!
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Old 05-15-23, 07:03 AM
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bonsai171
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Originally Posted by Fentuz
What do you use as paint thinner? if it was to clean/degrease the cassette, then, just rinse the disc/rotor with fresh water and do some rear braking and you should be fine.
I used odorless mineral spirits from Walmart. Been using the same bottle for the last 5 years. It lasts forever. Maybe tonight I'll have time to put the bike back together. The rotor was really dirty when I clean it with IPA last night too.

Dave
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Old 05-15-23, 07:47 AM
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Originally Posted by bonsai171
I used odorless mineral spirits from Walmart. Been using the same bottle for the last 5 years. It lasts forever. Maybe tonight I'll have time to put the bike back together. The rotor was really dirty when I clean it with IPA last night too.
Dave
So mineral spirit/white spirit should be fine, rince with water and proceed with a few hard brakes and it will be fine.

I tend to "de mud" my bike, clean the cassette/chain/pullet with white spirit, wash everything with soappy water and rinse. once dried and relubbed, I run the brakes a few time to clean the surface of both rotors ad pads... then, in storage until next adventure.
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