Never seen this myself, how old are the tyres???

 

they are only a yearold at most , it just seems odd to have three people expirence this !

 

Never seen or heard of this and I am an Ortmann addict

Any chance you can post a clear picture and remember the order number? I will pass it on to Ortmann and ask advice for you.

 

QUOTE that the wheels had gone all soft and soggy

do you mean the actual wheels or the tyres?

 

Ortmann tires are made of polyurethane, the same stuff they use for skate board and rollerskate tires. Polyurethane should last for years. I would not recommend cleaning it with anything but plain of soapy water.

 

Allmost all classic car racers use Ortmanns, iv
used them for years and have never heard of a single case
or had it happen to me.
Are you applying anything to the tyres, oil, petrol or anything
else?.
to have 3 people in the same club have this seems quite strange
Get onto Colin Spark at R/S racing see what he say,s.
Let us know what you find out.
cheers
Mac p

 

er, we don't actually know whether Adam meant the wheels or the tyres that had gone 'soft and soggy', it says 'wheels' in his post, so there could be something else going on here.

 

Soggy wheels!!! if he has he,s got a REAL problem!!
I hope its not catching.
Mac p

 

They may have used some kind of glue that has attacked the plastic and made it go soggy, I dunno can't see them from here

, I can only read the post and take it as it reads!
"the wheels had gone all soft and soggy "
maybe if Adam got back to us with a little more info we could solve the problem

 

thanks for the response chaps , but yes i really do mean the "wheels " . i'll try and take a picture and put it on the forum , it's a most odd thing tosee on a car . We as a club only race OTB , and i mean OTB . we only put orts on non-mag and certain brown mag classes . the tyres are trued but not glued to the rim and they are not oiled or bathed in anything . Yes i know some of you will find this odd but this iis how we race . www.gordanoscalextricracingclub.co.uk

 

You just have to let us all know the outcome
of this one, quite intriguing.
Mac P

 

Adam, when you sand the tires,, is the dust left on the sandpaper grey, or black. If it is not grey, then the tires are not real Ortmanns.

 

QUOTE (Daryl @ 29 Aug 2007, 05:13) <{POST_SNAPBACK}>Adam, when you sand the tires,, is the dust left on the sandpaper grey, or black. If it is not grey, then the tires are not real Ortmanns.

Darryl, are you suggesting that these darn Chinese already have fake Ortmans on the market

 

Actualy we're talking about DOW tires, Dickel (?), Ortman, Wiesel. These are more or less the same because they al use the secret recipe from the inventor, it was not Michael Ortman but mr. Wiesel but correct me if I am wrong. He has done some posting on this subject in this forum. But they are sligtly different so you first have to be sure which one of the three. Also you have to know if it tires are from before or after the formula changed. This happened due to the fact that one of the secret components is forbidded now, it's poison.

So if the tires are Ortman and from the new formula I am sure that the maker will be very very interrested in this. I have his email adres somewere at home, I can PM it to you just let me know.

Edit : typos

 

Interesting CarreraHenk.
In the US we have a number of suppliers. I had always the term "Ortmann" and "speedy Wiesel" were synomonous. Does this mean that there may be certain sizes that are available in one but not the other?
I would be interested in more information on the history of the "Ortmann" type tire.
thanks

 

Iv mailed Michael to get his views,
ill post as soon as he gets back to me .
Mac P

 

This really sounds like an additive.....

I know when Ibought some oil from Andy Browne - I got STRICT instructions not to let it get nears the wheels and it was destructive on certain plastic's......

Interested to see what conclusions are drawn from all this......

 

This is a chemical reaction between the rubber tires and the plastic rim!
I have seen this time after time when opening a vintage model car kit from the early 60's... unless the rubber tires were not separated from the plastic in some way, the rubber "ate into" the styrene kit plastic. This could also be seen when purchasing a vintage old built-up off eBay.
Either way, the styrene parts were totally ruined while the rubber tires seemed to be unaffected leading most vintage kit collectors to allow for opening of vintage kits with the purpose of separately bagging the tires. The reaction does not happen on kits from the 70's due to the manufacturers switching to vinyl type of rubber for tire casting and of course parts bagging.

The simply solution for slot racers is to paint the inside of the plastic rim before adding the tire thusly creating a barrier. Gluing the tire to the rim may also contribute to separating the two materials and avoiding any reaction.

 

The Scalextric Toys-R-Us Aston Martin DBRs suffer from a similar problem, but not all of them, so it may be down to where they have been kept, i.e. in a hot place?

 

QUOTE (Daryl @ 29 Aug 2007, 07:10) <{POST_SNAPBACK}>Interesting CarreraHenk.
In the US we have a number of suppliers. I had always the term "Ortmann" and "speedy Wiesel" were synomonous. Does this mean that there may be certain sizes that are available in one but not the other?
I would be interested in more information on the history of the "Ortmann" type tire.
thanks

Hi Daryl, wenn I come back from my holidays I will try to find some information but I am pretty sure that they inventor did post here in the forum telling about the tires and their history. I also read some German forums and since they mainly drive on Carrera track these Ortman tires are very popular over there but I haven't read about plastic rims being 'destroyed' by the tires.

Edit: regarding the sizes, i am not sure but I think that Michel Ortman makes more sizes than Mr. Wiesel. I think the later is more into the 1:24 scale cars.

 

Yes, M. Ortmann produces many sizes of tires, both for 1/32 RTR cars and 1/24 aluminium rims.

Wiesel and Dickel tires are similar to Ortmann, but not 100% identical. And both Wiesel and Dickel produce only tires for 1/24 aluminium rims (Scale Racing)

 

Here is an old topic where we discussed Ortman Tires. Ortman Tires - Whats The Deal?

Later

Gordo Bond 007

 

Recently both producers have made a statement about the new mix in some German forums. For those who can read German and are interested, here's the links :

Guido Dickel's statement

Michael Ortman's statement

Perhaps Babelfish can translate this correctly for you but it seems that the new compounds are not as fast as the old one's and shouldn't be sanded and polished as much as the old ones. You can see the difference between the two compounds because the new ones are blue-ish when you look carefully.

My personal opinion on these tires is that they give an immediate grip. When you are willing to drive a lot of round on your track with 'normal' rubber eventually you will get grip as well, it's just not right there. But to use them well one has to sand and polish them which will mean you'll need a Hudy or the like. The normal tires, like SlotIt P-series rubber, just need to be rounded to give a good grip on a track that has been driven a lot.

I have also read on the German freeslotter board that some who stopped with these PU tires and went back to 'normal' rubber now have an even better grip and faster laptimes, but it took a while to establish.

I myself don't use PU tires at home for this reason, I have a good grip for rubber so I can drive any car I have with more or less standard tires.

 

Actually, it is the vinyl additives in the urethane that eat certain kinds of polystyrene. As a collector of 1950's die-cast miniature cars, I have seen this problem quite often especially on the French CIJ cars. The white vinyl tires simply eat the hubs! However if the wheel is "plated" (metallized with vacuumed aluminum powder) the reaction does not happen.

Our TSR cars use tires manufactured by Michael Ortmann but their rims are made of glass-filled nylon and there is no reaction. But there is little doubt that a chemical and destructive reaction may happen onto polystyrene wheels as used on many plastic slot cars. So indeed, a coating of some sort will be necessary to avoid this cannibalistic reaction.

As far as the Ortmann new tires, they are still offering a huge advantage over any stock tires I have ever seen, so far. The old mix became unavailable because of environmental concerns. Which concerns are unknown to me at this time but Michael told me about this 2 years ago during his visit to California.