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Old 03-05-2012, 08:52 AM   #1
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Default Can we talk tires?

Tires: Rubber/Foam

Im going to ask some seriously newbie questions here....and i apologize for that upfront! lol

What are foam tires used for?

What are rubber tires used for?

is it for carpet or better on carpet, vice versa for rubber tires?

Also can you explain the different numbers associated with tires...

im an off roader getting in to on-road!
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Old 03-05-2012, 09:53 AM   #2
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Originally Posted by BlackStarRacing View Post
Tires: Rubber/Foam

Im going to ask some seriously newbie questions here....and i apologize for that upfront! lol

What are foam tires used for?

What are rubber tires used for?

is it for carpet or better on carpet, vice versa for rubber tires?

Also can you explain the different numbers associated with tires...

im an off roader getting in to on-road!
It's mainly just due to rules. Foam has more grip on all surfaces, but it's pretty much only used by pan cars and nitro cars now. There might be a few places still racing foam Touring, but just about everywhere has made rubber the rule for touring car classes.

The numbers represent a temperature in Celsius that the tire works best at.
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Old 03-05-2012, 10:20 AM   #3
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We race foams here simply because of better grip. I find them to last longer, the only problem being that they change ride height when they are worn so you should raise the car a bit. Rubber isn't as consistant as foams, but on normal grip tracks (not very low as mine) I belive they are a better choice since they are faster on a straight line. The proof for that is that almost everyone is running rubber these days.
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Old 03-05-2012, 01:11 PM   #4
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Quote:
Originally Posted by locked View Post
It's mainly just due to rules. Foam has more grip on all surfaces, but it's pretty much only used by pan cars and nitro cars now. There might be a few places still racing foam Touring, but just about everywhere has made rubber the rule for touring car classes.

The numbers represent a temperature in Celsius that the tire works best at.
i live in hot south florida....so that helps out great deal! is there any brand that stands out?
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Old 03-05-2012, 01:32 PM   #5
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I've tried a few brands at our home track, and there's a couple of differences.

The tyres I've used are sorex 36r, ride re36, sweep exp 36 and muchmore 32. What's interesting there is the muchmore 32 works about the same as the sorex 36. The sorex has just a touch more bite for me, but the wear is a bit better on the muchmore. And the rating is different on both yet they perform mostly the same.

The sweeps were the worst I've tried, the grip was lower, and they tore up quickly.

The rides were a weird one tho. They seemed to get better as they got older, but initially were fairly slippery, they took about 2-3 mins to "come on" but after they did they were better then the sorex. Problem being that because they were initially slow I'd lost to much time for the extra final performance to matter. The wear on these is also very good, the were easily the best tyre I've tried for that. I'd like to experiment more with warmers and maybe the 32 version.

All of that is based on no tyre treatment or warmers before running. I don't really have enough time at club meetings for my process, and it's probably a bit to serious for club meetings as well. At a large meeting it's worth a lot of extra time. Nearly .5 of a second on a good run with the sorex.

My track is med-low grip asphalt, outdoor, at mostly 25-35*C.
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Old 03-05-2012, 01:50 PM   #6
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Quote:
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I've tried a few brands at our home track, and there's a couple of differences.

The tyres I've used are sorex 36r, ride re36, sweep exp 36 and muchmore 32. What's interesting there is the muchmore 32 works about the same as the sorex 36. The sorex has just a touch more bite for me, but the wear is a bit better on the muchmore. And the rating is different on both yet they perform mostly the same.

The sweeps were the worst I've tried, the grip was lower, and they tore up quickly.

The rides were a weird one tho. They seemed to get better as they got older, but initially were fairly slippery, they took about 2-3 mins to "come on" but after they did they were better then the sorex. Problem being that because they were initially slow I'd lost to much time for the extra final performance to matter. The wear on these is also very good, the were easily the best tyre I've tried for that. I'd like to experiment more with warmers and maybe the 32 version.

All of that is based on no tyre treatment or warmers before running. I don't really have enough time at club meetings for my process, and it's probably a bit to serious for club meetings as well. At a large meeting it's worth a lot of extra time. Nearly .5 of a second on a good run with the sorex.

My track is med-low grip asphalt, outdoor, at mostly 25-35*C.
Exactly the kinda of info I need thanks a great deal!
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Old 03-05-2012, 05:14 PM   #7
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As much fun as it is running foam tires on a TC, as mentioned it's a LOT more work. As mentioned, you're constantly dealing with changing variables every time you run (or else you're buying a truing a ton of tires.) Rubber tire works fine on most surfaces, and is a great deal simpler to work with.
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Old 03-05-2012, 05:30 PM   #8
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I have run USGT with Solaris on asphalt, with new tires I always ran warmers...esp. if the first qual. was still cool outside, and depending on the track temp....If it is a hot day I do not run warmers, as the tire may heat and cause a "greasy" feeling on the track.

That being said, if the tire is 'broken" in I also will not run warmers, but it depends on track temp. as well as ambient temp. all of these have a major effect on performance.

On carpet I am still chasing a good setup, although I have been OK, but I am not satisfied, I have never ran warmers on carpet....The only reason why I would think someone woule run warmers on carpet is because they had a firm tire which needed to be "softened" by heat to gain the traction, which would be obtained by a softer shore and laps. My two pennies
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Old 03-05-2012, 06:00 PM   #9
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Default so go rubber!

Quote:
Originally Posted by LasagnaCat View Post
As much fun as it is running foam tires on a TC, as mentioned it's a LOT more work. As mentioned, you're constantly dealing with changing variables every time you run (or else you're buying a truing a ton of tires.) Rubber tire works fine on most surfaces, and is a great deal simpler to work with.
you know we have one of the largest hobby stores here in south florida and you know you would think they would offer more services like tweaking, setup and tire truing....

thanks for the heads up with foam!
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Old 03-05-2012, 06:01 PM   #10
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Default So what I'm seeing is....

Quote:
Originally Posted by NPETRO View Post
I have run USGT with Solaris on asphalt, with new tires I always ran warmers...esp. if the first qual. was still cool outside, and depending on the track temp....If it is a hot day I do not run warmers, as the tire may heat and cause a "greasy" feeling on the track.

That being said, if the tire is 'broken" in I also will not run warmers, but it depends on track temp. as well as ambient temp. all of these have a major effect on performance.

On carpet I am still chasing a good setup, although I have been OK, but I am not satisfied, I have never ran warmers on carpet....The only reason why I would think someone woule run warmers on carpet is because they had a firm tire which needed to be "softened" by heat to gain the traction, which would be obtained by a softer shore and laps. My two pennies
Solaris, Sorex and muchmore are the tires i should be looking at and looking that the ambient temp here is around 75-80 everyday then i should place that in my decision on tires!

thanks
Daryl
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Old 03-05-2012, 06:03 PM   #11
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Tires are rated based on track temperature, not ambient temp.
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Old 03-05-2012, 06:10 PM   #12
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Just for more info, the sorex tyres I've been using we're not the pre mounts. I've been buying the tyre, insert and wheel separately. I'm using the med c insert, and Jaco Prisim wheels. The med c insert is a little more grippy for me, and the jaco rims take a hiding and hold up well, they also seem to have a bit more clearance when mounted then the standard schumacher revlite rims.

It's also worth mentioning that the muchmore's worked better on a different track, they seem to have a better temperature window then the sorex.

Glad I could help
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Old 03-05-2012, 06:11 PM   #13
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Quote:
Originally Posted by Serzoni View Post
Tires are rated based on track temperature, not ambient temp.
the heat is hot here so i know where to start with first buying, i mean if its 80 at noon the track will be pretty warm so cooler tires i shouldn't buy until winter..... i know i need to take the temp of the track do best determine what wheels to run...but should i walk the track every now and then taking the temp?
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Old 03-05-2012, 06:37 PM   #14
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Default Am i on the right track.....

Below is the breakdown of the Celsius to Fahrenheit on the tires,
24 C = 75.2 F
28 C = 82.4 F
30 C = 86 F
32 C = 89.6 F
36 C = 96.8 F

I also read that the number represents the hardness of the tire, so is it heat-hardness the ratio?

Thanks
Daryl
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