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Old 05-25-2006, 11:33 AM   #1
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Default Best rubber tire

Hi guys, did search and found LOTS of posts, but not quite what I was looking for... could y'all help me out? Haven't bought new tires in a while and I noticed that there are more choices than before.

I've used sorex 32R's and CS27's in the past with good results, but am wondering about the RP-30's and the powers international tires from speedtech.

Which is best for outdoor, dusty, bumpy asphalt?
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Old 05-25-2006, 11:54 AM   #2
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I personally feel that the RP30 is a faster tire than the CS27, but it falls off faster than the CS27s do. I have some really worn 27s that still do great at club level. But the RPs seem to loose grip after a couple heat cycles...maybe 3 or 4 good runs then they really seem to fall off.

I have also had some mixed results with the Sorex tires...they seem real consistent indoors with the cooler compunds on carpet...but the warmer compounds 32-36 etc. seem to not be as consistent or long lasting outside...but that's just me.
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Old 05-25-2006, 12:12 PM   #3
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Is the surface sealed or un sealed?
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Old 05-25-2006, 12:12 PM   #4
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Thank you for your input! Anyone else have something to add?
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Old 05-25-2006, 12:13 PM   #5
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well it was re-tarred a year ago.
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Old 05-25-2006, 01:05 PM   #6
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Quote:
Originally Posted by CIVIC91
I personally feel that the RP30 is a faster tire than the CS27, but it falls off faster than the CS27s do. I have some really worn 27s that still do great at club level. But the RPs seem to loose grip after a couple heat cycles...maybe 3 or 4 good runs then they really seem to fall off.

I have also had some mixed results with the Sorex tires...they seem real consistent indoors with the cooler compunds on carpet...but the warmer compounds 32-36 etc. seem to not be as consistent or long lasting outside...but that's just me.
You are correct in your opinion.

The CS (Control Standard) series are designed to run consistently for as many runs as possible. This is a huge advantage for a tire used for spec tire races.

The RP (Racing Physics) series are designed to be an all out racing tire. Fast lap times were a more important design criteria than tire life. RP tires are usually 1-2/10ths per lap faster than a similar compound CS tire.

Tire life - CS27

Stock or 19T : 6-10 runs before falling off
Open Mod: 4-6 runs

Tire life - RP30

Stock or 19T : 4-8 runs before falling off
Open Mod: 2-4 runs

The better you car setup the longer your tires will stay fast. Cars that are really working well slide less and this reduces tire wear.

The best traction compounds are:

CS tires:

Cold 0-75 deg F track surface : Paragon Ground Effects
Warm 65-120 deg F: 50/50 Mix of Paragon FXII and Trinity Tire Tweak
Hot 100-160 deg F: Tire Tweak

RP tires:

Cold 0-75 deg F track surface : Paragon Ground Effects
Warm 65-120 deg F: Hybrid Dip baked 20min with tire warmers
Hot 100-160 deg F: Hybrid Dip
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Old 05-25-2006, 02:11 PM   #7
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Yeah, I have been using the Trinity Tire Tweak and am actually very happy with it.
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Old 05-25-2006, 03:57 PM   #8
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Quote:
Originally Posted by AdrianM
You are correct in your opinion.

The CS (Control Standard) series are designed to run consistently for as many runs as possible. This is a huge advantage for a tire used for spec tire races.

The RP (Racing Physics) series are designed to be an all out racing tire. Fast lap times were a more important design criteria than tire life. RP tires are usually 1-2/10ths per lap faster than a similar compound CS tire.

Tire life - CS27

Stock or 19T : 6-10 runs before falling off
Open Mod: 4-6 runs

Tire life - RP30

Stock or 19T : 4-8 runs before falling off
Open Mod: 2-4 runs

The better you car setup the longer your tires will stay fast. Cars that are really working well slide less and this reduces tire wear.

The best traction compounds are:

CS tires:

Cold 0-75 deg F track surface : Paragon Ground Effects
Warm 65-120 deg F: 50/50 Mix of Paragon FXII and Trinity Tire Tweak
Hot 100-160 deg F: Tire Tweak

RP tires:

Cold 0-75 deg F track surface : Paragon Ground Effects
Warm 65-120 deg F: Hybrid Dip baked 20min with tire warmers
Hot 100-160 deg F: Hybrid Dip
Adrian, if it were up to you, which tire would you recommend for the IIC? CS or RP?
(supposing of course that sales of more tires due to the drop in grip did not benefit you!!! )
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Old 05-25-2006, 04:09 PM   #9
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We are working with a few top drivers from the top teams testing tires now.

I think the RP24 or RP 30 will be the way to go at the IIC.
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Old 05-25-2006, 07:01 PM   #10
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SOOO THATS WHAT THAT MEANS!!!!

Its been years and I always wondered what CS stood for. :P
Thanks Adrian, RP are then not for me cuz I rarely buy tires and need them to last a long time.

well, so far I have CS-27's and Sorex 32's to choose from...

I know CS-27's come in preglued packs, has anyone seen Sorex 32's in preglued packs?
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Old 05-25-2006, 07:22 PM   #11
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I have personally had great results with Sorex 36's, both indoor asphalt, and out door sealed and non-sealed.

I have tried a set of the Speedmind Sorex premounts, and they are a great deal. They are just a tad slower that the Sorex components built with thin firm inserts. (My fav. is Sorex 36r's with Sorex type C thin firm inserts on Hudy Medium wheels)
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Old 05-25-2006, 07:42 PM   #12
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hey adrian would u have some sort of guide to tire compound to track temp?
ive been using 36'r sorex and am buying 32 sorex and 28r's sorex and was wondering if what temps should i change tires also what traction compund i should use as i dont have warmers please and thank you
oh what are the pro's and cons of sorex versue rp or cs???
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Old 05-25-2006, 08:17 PM   #13
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Hope this helps you out... I got it from another posting...

Tire Chart:

Take-Off
CS22 - 32 - 86f= 0 - 30c
CS27 - 50 - 122f=10 - 50c
CS32 - 68 - 140f=20 - 60c
CS37 -104 - 158f=40 - 70c
RP24
RP30

SOREX
20R
24R - 59 - 68f=15 - 20c
28R - 68 - 82f=20 - 28c
32R - 81 - 97f=27 - 36c
36R - 97 - 151f=36 - 66c
40R -120 - 171f=49 - 77c

Powers
PJ22 - 32 - 77f= 0 - 25c
PJ27 - 50 - 113f=10 - 45c
PJ30 - 68 - 140f=20 - 60c
PJ35 -104 - 158f=40 - 70c
CS22, 24r, RP24 are the same
CS27, 28r, RP30 are the same
CS32, 36r, RP32 (or is it 36?) are the same
PJ30 - 68 - 140f=20 - 60c
PJ35 -104 - 158f=40 - 70c
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Old 05-25-2006, 09:38 PM   #14
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Quote:
Originally Posted by bvoltz
Hope this helps you out... I got it from another posting...

Tire Chart:

Take-Off
CS22 - 32 - 86f= 0 - 30c
CS27 - 50 - 122f=10 - 50c
CS32 - 68 - 140f=20 - 60c
CS37 -104 - 158f=40 - 70c
RP24
RP30

SOREX
20R
24R - 59 - 68f=15 - 20c
28R - 68 - 82f=20 - 28c
32R - 81 - 97f=27 - 36c
36R - 97 - 151f=36 - 66c
40R -120 - 171f=49 - 77c

Powers
PJ22 - 32 - 77f= 0 - 25c
PJ27 - 50 - 113f=10 - 45c
PJ30 - 68 - 140f=20 - 60c
PJ35 -104 - 158f=40 - 70c
CS22, 24r, RP24 are the same
CS27, 28r, RP30 are the same
CS32, 36r, RP32 (or is it 36?) are the same
PJ30 - 68 - 140f=20 - 60c
PJ35 -104 - 158f=40 - 70c
I cant speak for the non take off tires but you cant go by the above temp ranges for take off. CS and RP have usable temp ranges so wide you cant pick tires by track temp.

For example CS27 work from ~60deg F to ~150deg F just fine. CS32's are near useless at any temperature outdoors. The only time you need to use CS32's is under extreme traction conditions to free up your car. However, the CS32 is THE tire at Hobbytown, Frederic's indoor asphalt track.

Instead of temperature...think traction. CS22 for low traction, CS27 at most places, CS32 to cope with obscene traction. The CS37...well...dont don't really stock that tire.

The RP's are more temp specific but they still have really broad ranges. Last weekend while testing for the Reedy Race in FL. Paul Wynn and Teemu Leino of Schumacher and Jeff Dayger and Ray Darroch of Corally were running RP30GL's on a track that was 160 deg F and they were getting along just fine.

The only RP that does not like heat is the RP24. That is an indoor carpet tire or a cool night asphalt tire. The RP30 like the CS27 seems to work everywhere. The RP36 wears better and may be faster than the RP30 on really hot tracks. The RP40 runs just like the 36 in early testing but we haven't really run it that much. The RP40 still has tons of traction so its not like the CS32 or 37.
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Old 05-25-2006, 11:16 PM   #15
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Quote:
Originally Posted by AdrianM
We are working with a few top drivers from the top teams testing tires now.

I think the RP24 or RP 30 will be the way to go at the IIC.
i guess i can understand why you would make that choice...i hope you can understand why a racer like myself would be disappointed with that choice.

especially when they were almost traction rolling last year at iic with the cs27 (is more traction really whats needed?)

on another note, thanks for all this great tire info! i think its a first from anyone!
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