Wheel and Tire Auto-x Setup?
<---this being me of course...
11-02-2005, 11:51 PM
#28
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Originally Posted by whiterex
So would it be safe to assume that the teamrx8 bar is a happy medium between the MS and RB? If so, where would someone aquire one.
Chuck
Chuck
11-03-2005, 05:01 AM
#29
I see I got a bunch of PM's and emails, but I'm on the road traveling and don't have time to respond immediately. Might take me another day or two before I get back to everyone so please be patient 
only three prototype bars out there, all forum members; myself, clyde and dknv
only three prototype bars out there, all forum members; myself, clyde and dknv
Last edited by TeamRX8; 11-03-2005 at 07:30 AM.
11-03-2005, 07:22 AM
#30
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Originally Posted by conevadr
Interesting that the 245 V710 is the hot tire for BS. What about the 275 Hoosier? If you could tell the tire makers what to build, what would it be? 265/35 V710 perhaps?
11-09-2005, 09:36 PM
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I hope you don't mind me asking:
Why are you all running 18" and not 17" rims?
Wouldn't you end up with less wheel inertia and possibly better gearing? Or does the stiffer sidewall offset any possible disadvantages? Or do the rules simply not allow you to run 17"?
Why are you all running 18" and not 17" rims?
Wouldn't you end up with less wheel inertia and possibly better gearing? Or does the stiffer sidewall offset any possible disadvantages? Or do the rules simply not allow you to run 17"?
11-09-2005, 10:22 PM
#32
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I just noticed this thread which partially answers my question. Also the SSR 18x8 are lighter than I thought.
https://www.rx8club.com/rx-8-racing-25/anyone-running-17-wheels-track-74344/
Does this mean that, if you could get 275/35-17 then that would be your choice?
And by the way regarding tire height: I understand that you want to reduce flex, but a taller tire should generally allow you to put more rubber on the ground. I'm surprised that this has not been experienced.
Speaking of that: I always wondered why do F1 cars have tall tires? After all a reduced height would make it safer at top speeds and prevent it from blowing up (eg. Michelin @ Indianapolis)
https://www.rx8club.com/rx-8-racing-25/anyone-running-17-wheels-track-74344/
Originally Posted by ULLLUSE
Most guys on 18 are on a 245-35.
Here is stock and various R tire sizes:
Tire Size Sidewall Diameter Circumference Rev/Mile Difference
225/45-18 4.0 in. 25.97 in. 81.59 in. 777 0.0%
245/40-17 3.9 in. 24.72 in. 77.65 in. 816 -4.8%
245/35-18 3.4 in. 24.75 in. 77.76 in. 815 -4.7%
275/40-17 4.3 in. 25.66 in. 80.62 in. 786 -1.2%
245/45-17 4.3 in. 25.68 in. 80.68 in. 785 -1.1%
The only 17 I would run would be a 275-40-17. If I was going to give up gear it would be worth it to get the extra width for grip and heat resistance. Either way I would go with a 17X9 wheel, that way you can run a 245 now or a 275 if you want. The price difference between a 17X8-8.5 or 9 will be very small.
Due to the taller sidewall of the 245-40-17 I cant see how it would be as fast as the 18 becasue of the extra tire flex. The only thing you gain is cheap tires. One plus is you might even be able to pick up Grand AM take offs from the pro teams if you run the 17.
Here is stock and various R tire sizes:
Tire Size Sidewall Diameter Circumference Rev/Mile Difference
225/45-18 4.0 in. 25.97 in. 81.59 in. 777 0.0%
245/40-17 3.9 in. 24.72 in. 77.65 in. 816 -4.8%
245/35-18 3.4 in. 24.75 in. 77.76 in. 815 -4.7%
275/40-17 4.3 in. 25.66 in. 80.62 in. 786 -1.2%
245/45-17 4.3 in. 25.68 in. 80.68 in. 785 -1.1%
The only 17 I would run would be a 275-40-17. If I was going to give up gear it would be worth it to get the extra width for grip and heat resistance. Either way I would go with a 17X9 wheel, that way you can run a 245 now or a 275 if you want. The price difference between a 17X8-8.5 or 9 will be very small.
Due to the taller sidewall of the 245-40-17 I cant see how it would be as fast as the 18 becasue of the extra tire flex. The only thing you gain is cheap tires. One plus is you might even be able to pick up Grand AM take offs from the pro teams if you run the 17.
And by the way regarding tire height: I understand that you want to reduce flex, but a taller tire should generally allow you to put more rubber on the ground. I'm surprised that this has not been experienced.
Speaking of that: I always wondered why do F1 cars have tall tires? After all a reduced height would make it safer at top speeds and prevent it from blowing up (eg. Michelin @ Indianapolis)
11-09-2005, 11:27 PM
#33
Originally Posted by globi
I hope you don't mind me asking:
Why are you all running 18" and not 17" rims?
Wouldn't you end up with less wheel inertia and possibly better gearing? Or does the stiffer sidewall offset any possible disadvantages? Or do the rules simply not allow you to run 17"?
Why are you all running 18" and not 17" rims?
Wouldn't you end up with less wheel inertia and possibly better gearing? Or does the stiffer sidewall offset any possible disadvantages? Or do the rules simply not allow you to run 17"?
In most cases the 17" wheel will be lighter than the 18" but the 17" tire weighs the same or more. The tire weight being on the outside has more effect than the wheel.
You are also right about a taller tire having more contact, look at top fuel cars, but taller than stock hurts your gearing and a taller tire is going to be heavy.
11-10-2005, 05:55 AM
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Tire rack. You can shop around and *maybe* save a few dollars but Tire Rack's knowledge and service is great. www.tirerack.com
11-10-2005, 08:21 AM
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Originally Posted by bbq0801
So on average what does a set of SSR comps and Kumho V710s go for? Where is the best place to get them?
Has anyone tried any wheels aside from the SSR's that are similar in weight, but lower in price? I know, you have to pay to play with the big dogs, but I am having a hard time explaining this one to my better half...
11-10-2005, 08:50 AM
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Originally Posted by ULLLOSE
You are also right about a taller tire having more contact, look at top fuel cars, but taller than stock hurts your gearing and a taller tire is going to be heavy.
11-10-2005, 09:54 AM
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Originally Posted by Cito
Has anyone tried any wheels aside from the SSR's that are similar in weight, but lower in price? I know, you have to pay to play with the big dogs, but I am having a hard time explaining this one to my better half...
I also think the costs are a little steep. Especially since you can only use these rims on a racing day, if you run BS. If BS would allow street tires only, you could drive them all year long. I wonder why this hasn't been considered?
I guess you could always stack them in your living room put a round glass disk on it and use it as a bar or a coffee table in your living room (on weekdays only of course). This way your better half could enjoy it as well.
11-10-2005, 10:02 AM
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Originally Posted by clyde
It's not the tire height that gives them a bigger contact patch, it's that the sidewalls are so soft, that the tire deforms under acceleration which gives the tire a longer contact patch, which is what gives them so much more traction. Further downt he strip, where the tire swells and becomes even taller, it helps them achieve a higher top speed.
But of course this has nothing to do with tall F1 tires. At least in the F1 case the extra contact patch appears to offset any flexing disadvantages of a tall tire.
Last edited by globi; 11-10-2005 at 10:05 AM.
11-10-2005, 10:16 AM
#40
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Originally Posted by globi
I also think the costs are a little steep. Especially since you can only use these rims on a racing day, if you run BS. If BS would allow street tires only, you could drive them all year long. I wonder why this hasn't been considered?
I guess you could always stack them in your living room put a round glass disk on it and use it as a bar or a coffee table in your living room (on weekdays only of course). This way your better half could enjoy it as well.
I guess you could always stack them in your living room put a round glass disk on it and use it as a bar or a coffee table in your living room (on weekdays only of course). This way your better half could enjoy it as well.
11-10-2005, 10:22 AM
#41
Originally Posted by bbq0801
So on average what does a set of SSR comps and Kumho V710s go for? Where is the best place to get them?
11-10-2005, 11:48 AM
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Originally Posted by globi
I haven't tried, but the Rota Slipstreams are relatively light and inexpensive and are available in 17"x8.5".
I also think the costs are a little steep. Especially since you can only use these rims on a racing day, if you run BS. If BS would allow street tires only, you could drive them all year long. I wonder why this hasn't been considered?
I also think the costs are a little steep. Especially since you can only use these rims on a racing day, if you run BS. If BS would allow street tires only, you could drive them all year long. I wonder why this hasn't been considered?
--kC
11-10-2005, 01:06 PM
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Gruppe-s.com has a bunch of wheels that will fit, all at least a pound more, but I haven't got back a quote yet. I should probably get some Comps before they are impossible to get.
11-10-2005, 01:18 PM
#47
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For the sake of discussion, can you run a 16 wheel? The 16's are offered on the automatic, but not the 6-speed. Not sure off the top of my head on that rule. I don't know for sure, but it doesn't look like they would fit over the rotors in front...
11-10-2005, 01:28 PM
#48
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Solo2 Stock Rule:
13.4 WHEELS
Any type wheel may be used provided it complies with the following:
it is the same width and diameter as standard, and as installed
(including wheel spacers if applicable) it does not have an offset more
than +/- 0.25 inch from a standard wheel for the car. The resultant
change in track dimensions is allowed.
Keep http://www.scca.org/_filelibrary/File/2005SoloRules.pdf handy...
13.4 WHEELS
Any type wheel may be used provided it complies with the following:
it is the same width and diameter as standard, and as installed
(including wheel spacers if applicable) it does not have an offset more
than +/- 0.25 inch from a standard wheel for the car. The resultant
change in track dimensions is allowed.
Keep http://www.scca.org/_filelibrary/File/2005SoloRules.pdf handy...
Last edited by CRX Millennium; 11-10-2005 at 01:33 PM.
11-10-2005, 01:32 PM
#49
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People looking for minus fitment for snow tire/wheel combo have tried 16'' on Sport-optioned RX-8 (both Auto & Manual) without success. If you have Auto RX-8 without Sports package, 16'' will fit, but you are probably kidding yourself on the chance of succeeding at both local/Nat'l levels.
11-10-2005, 01:39 PM
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For the sake of discussion. A manual version with 16" wheels is available in Europe. So if you were to import this version you could possibly run 16" wheels. (Or is there a rule that says that your're not allowed to use imports?)