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 Post subject: Re:
PostPosted: Thu Dec 27, 2018 4:01 pm 
retrobike rider
retrobike rider
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Joined: Fri Aug 08, 2008 2:36 pm
Posts: 17927
Location: Yorkshire, England
Spudly, I have spent tyre you could try it with.
A set of Blackwall Smokes.
Some amberwall Smoke lite compe
And some old large square nobbled tyre people always wanted, but I forget the name,ground control maybe.


P.s. don't want to accidentally spay a bike frame when you accidentally do some tyres ;-)


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 Post subject: Re: NOS tyres
PostPosted: Mon Jan 07, 2019 11:18 pm 
Dirt Disciple

Joined: Mon Jul 23, 2018 6:31 pm
Posts: 28
Thanks, good info


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 Post subject: Re: NOS tyres
PostPosted: Sun Mar 10, 2019 10:54 pm 
retrobike rider
retrobike rider
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Joined: Tue Aug 11, 2015 4:58 pm
Posts: 1623
Location: South Wales
Been meaning to follow up for a while... Without reading back, I can’t remember if I said I had two NOS early 90s Smoke & Dart tyres purchased a couple months ago which I planned to perform my post-cure method on, and I did so yesterday. With great results!

I bought the pair just for the Smoke, which is going on a build I’m midway through, so it needs to be treated because it looks awful. However, just to prove the concept and in true experimental style, I used the Dart for this purpose. The Smoke will follow in exactly the same way.

NOTE: I decided to use a higher heat than recommended in my original post (100°C/212°F instead of 80°C/176°F, so the time had to be cut from 30 minutes to 10 minutes. But 30 mins @ 80°C/176°F would work the same.

#DISCLAIMER: If, for any reason whatsoever, you follow this procedure and kill your tyre, oven, family or self, I take no responsibility, but if you follow this method exactly, you should have no detrimental issues!

There was minimal smoke upon opening the oven = almost nothing in fact, but I opened the kitchen window and door just in case. Some freshly baked rubber smell, but nothing acrid or toxic.

METHOD
1. [IMPORTANT!] Ensure the missus is out. :lol:
2. Remove any trays, shelves or other ancillaries from the oven.
3. Set oven to 100°C (212°F), allow oven to warm up.
note: I used a separate thermometer due to lack of trust in the built-in thermostat, to ensure correct temperature was achieved.
note: if you have a fan oven, set it to 90°C (194°F).

4. Place tyre into oven.
i) Being a steel bead, I twisted into a figure eight to get it in. No way to avoid part of the tyre touching sides but take care not to directly touch any exposed heating elements (electric oven) or flame (gas). A Kevlar beaded tyre wouldn't have this issue, but I'd advise opening it out as big as possible for even heat distribution if post-curing Kevlar-beaded tyres.
ii) I also used some parchment paper to sit tyres on, so no molten or liquifies residue from tyre drips onto oven base or floor when removing.

5. ‘Bake’ for 10 minutes - Open the windows/doors for ventilation to the room - and remove tyre obviously taking care and using PPE for handling, like a glove or towel.

6. Voliá. :arrow: 8)

BEFORE: Mega wax blooming/leaching.
Attachment:
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DURING: What's cooking? A tyre!
Attachment:
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IMG_2486.JPG [ 153.91 KiB | Viewed 127 times ]

You can see the wax "melting" and this is then reabsorbed into the rubber surface.
Attachment:
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IMMEDIATELY AFTER REMOVAL: Some wet-looking patches. These dry off quickly.
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IMG_2491.JPG [ 191.77 KiB | Viewed 127 times ]

The OG Dart label - unaffected. Just as it was before the procedure.
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IMG_2493.JPG [ 156.52 KiB | Viewed 127 times ]

24h LATER (nothing else done to tyre; not touched, wiped, washed, cleaned or anything added. Simply just post-cured. Like brand new, factory fresh. 8) ):
Almost a before and after, the untreated Smoke with the post-cured Dart.
Attachment:
IMG_2502.JPG
IMG_2502.JPG [ 196.32 KiB | Viewed 127 times ]


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 Post subject: Re:
PostPosted: Mon Mar 11, 2019 9:44 am 
Retro Guru
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Joined: Mon May 07, 2012 10:30 pm
Posts: 452
Location: Lochaber
Remarkable :D
Looks great and will be interested to hear how it performs on the bike.


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 Post subject: Re: NOS tyres
PostPosted: Mon Mar 11, 2019 12:54 pm 
BoTM Winner
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Joined: Sun Jun 23, 2013 3:12 pm
Posts: 1814
Location: Southernmost US
I need to try this with some tires I have. Will advise on results within the same thread.


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 Post subject: Re: NOS tyres
PostPosted: Mon Mar 11, 2019 1:15 pm 
Old School Grand Master

Joined: Mon Feb 11, 2008 9:42 am
Posts: 3309
You could just add traction compound, which will essentially do the same thing....... replace the oils/waxes/softeners in the tyre.


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 Post subject: Re: NOS tyres
PostPosted: Mon Mar 11, 2019 2:50 pm 
retrobike rider
retrobike rider
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Joined: Tue Aug 11, 2015 4:58 pm
Posts: 1623
Location: South Wales
mattr wrote:
You could just add traction compound, which will essentially do the same thing....... replace the oils/waxes/softeners in the tyre.

No, that’s not going to perform the same function as a post cure. But I like your thinking.


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 Post subject: Re: NOS tyres
PostPosted: Mon Mar 11, 2019 2:52 pm 
retrobike rider
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Joined: Tue Aug 11, 2015 4:58 pm
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Location: South Wales
jonthefish wrote:
Remarkable :D
Looks great and will be interested to hear how it performs on the bike.

Thanks!
I imagine it’ll be exactly the same, but I don’t plan riding these. :mrgreen:


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 Post subject: Re:
PostPosted: Mon Mar 11, 2019 4:31 pm 
Retro Guru
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Joined: Sun Sep 03, 2006 8:36 pm
Posts: 3615
Location: Cambs UK
Remarkable well done!

J


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 Post subject: Re: NOS tyres
PostPosted: Sat Mar 16, 2019 4:57 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 19231
Location: Sunny Glasgow
Incredible result 8)

Maybe we need a 'Top Tip' banner :? thats certainly one of the best things ive heard on making tyres lovely. They do seem to suffer.


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