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Offline Paullie

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Contaminated tyres - advice please
« on: 21 October, 2018, 11:34:27 PM »
So pulled in to a Shell service station yesterday, filled up, and rode out through what looked like a large pool of water in a hollow by the pump. No smell. Out onto road, and bike behaving really strangely. First roundabout, gentle lean to go straight across, and bike nearly slid away from me!

Got home, cleaned tyres with soap and water, and some dirty stuff ran off. But there's still a residue on the edges of the tyres. Trying to post a photo but no luck. Should I try and clean them with petrol? Or some strong degreasant like brake cleaner?

Thing is, I have some miles to do this week, fully loaded. And under strict instructions from doc not to come off again after rib cage still mending from my off last week.

So clean with something? If so what? I'm going to hassle the service station when they open this week anyway. But I need to get going early in the week, so need to make a quick decision. Tyres are PR4s with loads of life in them yet.


« Last Edit: 21 October, 2018, 11:50:52 PM by Paullie »

Offline indytiger1050

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Re: Contaminated tyres - advice please
« Reply #1 on: 22 October, 2018, 01:20:50 AM »
I would be tempted to use a water based degreaser like Simple Green, Dawn dish soap.
More than likely it's diesel fuel you drove thru.

Unless you have NO choice don't ride a bike with touchy ribs. A punctured lung is BAD.

The degreaser should take care of the fuel. Could always follow up with a little sand paper to scuff up the rubber.
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Offline Yellow Dog

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Re: Contaminated tyres - advice please
« Reply #2 on: 22 October, 2018, 04:53:00 AM »
Anything fuel based, will be slippery. Crushed dishwashing tablet, applied on a kitchen scouring pad, and she's all good  :031:
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Offline Paul2bikes

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Re: Contaminated tyres - advice please
« Reply #3 on: 22 October, 2018, 08:30:08 AM »
I had that once, I used brake cleaner then a strong fairy liquid/hot water mix with scrubbing brush. Then took a ride on a gravel track to totally dry it out. Take care.
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Offline Paullie

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Re: Contaminated tyres - advice please
« Reply #4 on: 22 October, 2018, 09:52:55 AM »
Thanks guys. I was afraid it might be new tyre time. This was not regular diesel, no smell, I thought it was water. Until I stepped and rode in it.

I've also heard methylated spirits is good. Anyway, will give a couple of things a try.. thanks again.

Offline Paul2bikes

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Re: Contaminated tyres - advice please
« Reply #5 on: 22 October, 2018, 10:01:45 AM »
Could have been coolant, you'd have noticed diesel by the smell.
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Offline gosling 1

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Re: Contaminated tyres - advice please
« Reply #6 on: 22 October, 2018, 12:17:05 PM »
Give them a good rub down with contact cleaner, it should remove it and not leave any residue.

Been doing that for years on new tires to remove any leftover mold release and tire fitting lube.
« Last Edit: 22 October, 2018, 12:23:54 PM by gosling 1 »
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Offline Paullie

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Re: Contaminated tyres - advice please
« Reply #7 on: 22 October, 2018, 04:14:17 PM »
Cleaned them up with brake cleaner in the end - 1.5 cans of the stuff - and a rag. Rag was coming up black until I got rid of it all. Now we'll see.

Offline indytiger1050

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Re: Contaminated tyres - advice please
« Reply #8 on: 23 October, 2018, 02:25:24 AM »
 :084:  OK,, no smell not diesel.

Could be coolant, makes sense but brake cleaner wouldn't be needed to remove that.

Thought about using brake cleaner. Just know it's harsh on many plastics, paint, afraid it could be rough on rubber.

Take it easy until the tire scrubs in a bit. 

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Offline Paullie

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Re: Contaminated tyres - advice please
« Reply #9 on: 23 October, 2018, 08:39:44 PM »
Well made it to Brussels OK today, and fully loaded up too. Rear felt a bit uncertain at times early on, i.e that curved stretch from the M40 onto the M25, but later on seemed to settle down, so happy now. I didn't really push it the whole journey.

Dealer confirmed that it could have been raw anti-freeze, which is slippery apparently, and suggested brake cleaner. I sent a stiff note to Shell with pics, but no reply yet. I hope they'll be looking through the service station's camera footage.

Anyway, now the whole bike needs cleaning ...  :015: