I give up!!

How DO they do that??

I give up!!

Postby wixwacing » Sun 15 May, 2011 11:23 pm

Over the last few years I have tried to understand what makes rubber tyres go hard and brittle,and worst of all, cause an oily slick to spread over everything within cooey! I have tried everything. In this particular case the rear tyres on a 'Sloter' Lola (which I have had and raced on and off for three years) had been replaced with MJK's and were sealed in a zip bag in the model's box. The model was stored in a cool part of the garage and only taken out for race meetings. the model was last raced about eight weeks ago and this week when I opened it not only had the tyres in the airtight bag gone hard and oily......the original front tyres which have always been on the front, had done exactly the same thing at the same time! Got me beat? To my knowledge this has been happening since the 1970's were I first noticed it with MRRC model tyres.


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Re: I give up!!

Postby dangermouse » Mon 16 May, 2011 10:06 pm

Yep - I don't have many shelf queens but have had this happen to one of my cars, which was sitting on the shelf looking pretty - makes you wonder what the tyres are actually made of.

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Re: I give up!!

Postby Cyph » Mon 30 May, 2011 9:07 am

They are simply trying to revert to the state nature made them in, which in this case is oil.
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Re: I give up!!

Postby Roger Miller » Sun 13 Nov, 2011 3:16 pm

Howdy,

I recently left these tires, brand new out of the bag that day, in the sun, approx 23 degrees, not in bag not in a box, for no longer than 20 minutes, whilst re-arranging my stuff, to find this.

So it doesn't take long for these things to go belly up.

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Last edited by Roger Miller on Sun 30 Sep, 2012 11:02 pm, edited 2 times in total.
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Re: I give up!!

Postby wixwacing » Mon 19 Mar, 2012 8:44 pm

Latest victims are the front tyres on my Carrera DeTomaso and McLaren M20 I've got MJK's on the rear so they escaped! Fortunately the MJK 4206 (Pro Slot 19m.m.) tyres go straight on the fronts!!! Pheeeew!
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When I'm not racing slotcars,
I'm out in the back yard, burning food!!

When I win, it's because of my talent, not my car or my controller!
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Re: I give up!!

Postby frank9129 » Tue 19 Jan, 2016 6:31 am

I have a theory about why tires get hard and oily.
I host races for kids. They only have one speed. Flat out into the next corner. After about a year of torture the tires are worn out.
When there is a wreck the cars behind try to push their way through the pile. Tires get hot from the rubbing on the track. A few minutes later a new heat starts and the cars sit and cool off. After several heats the tires have gone through several cycles.
By the next race they have developed a little shine. Sanding helps but the tires are shot. Then they get hard and oily.
I believe heating and cooling is the problem I am having.
Frank
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Re: I give up!!

Postby 460cixy » Tue 19 Jan, 2016 10:11 am

I've had them go rock hard but never seen them get oily like that. I wonder about what some people are putting on there tyres to clean them ect then that product getting on the track surface and what effect that may have on tyres
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Re: I give up!!

Postby frank9129 » Tue 19 Jan, 2016 2:18 pm

I don't put anything on my tires. I don't want to clean it off my track.
I have a 4'x16' routed oval I call Crab Alley Speedway. The tires lay down a nice layer of rubber and tires stick to the corners.
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Re: I give up!!

Postby wixwacing » Tue 19 Jan, 2016 11:52 pm

Yep, there's no rhyme or reason for it that I know, I can't even pin it down to specific makes.
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When I'm not racing slotcars,
I'm out in the back yard, burning food!!

When I win, it's because of my talent, not my car or my controller!
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