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View Poll Results: Which do you prefer classic 15 or modern 18?
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Classic is best stick with 15"
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61 |
70.11% |
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Can't beat the better performance of the 18"
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26 |
29.89% |
 11Likes
02-12-2014, 08:50 PM
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CC Member
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Join Date: Feb 2014
Location: Grand Rapids,
MI
Cobra Make, Engine: Superformance #1309 www.spfowners.freeforums.net
Posts: 524
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Not Ranked
15" vs 18"
So I'm torn the classic look of the 15's or the better performance of the 18's?
What say ye?
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02-12-2014, 09:12 PM
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CC Member
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Join Date: Jul 2006
Location: Redding,
CA
Cobra Make, Engine: FFR chassis and suspension, Mr. Bruce 289 FIA body
Posts: 1,066
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Not Ranked
15" with the large sidewall tires fill the wheel wells and look better, IMO
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02-12-2014, 09:13 PM
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CC Member
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Join Date: Dec 2010
Location: Tempe,AZ-High Point,NC,
AZ
Cobra Make, Engine: Kirkham #684, 482FE, Mike Mccluskey build
Posts: 2,520
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Not Ranked
18 for performance, their isn't a tire that comes even close to the best 18's out their for performance, the 15 inch Avon's are great for performance, but put on a skid pad they will get left behind...
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PRIDEnJOY
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02-12-2014, 09:24 PM
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CC Member
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Join Date: Apr 2008
Location: Melbourne,
Vic
Cobra Make, Engine: Some polish thing... With some old engine
Posts: 2,286
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Not Ranked
Buy a set of 15s with Billboards for the look and then a set of 18s for racing around on...
Win/Win.
Me, I'm a 15s original guy, so went with Avons because they are DOT.
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02-12-2014, 10:25 PM
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CC Member
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Join Date: Sep 2009
Location: Camarillo,
CA
Cobra Make, Engine: SPF #2608, Roush 427SR T-W
Posts: 911
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Not Ranked
I have 17" they look "normal" to me. It is what ever you get used to. No matter what you have, you will like what you have. That is, unless you want to be pissed off all the time..... ha ha ha...
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02-12-2014, 11:03 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
It's all a personal opinion and what You think looks best. For me the 18's are out of scale regardless of their performance advantage. Too much wheel, not enough tire.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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02-13-2014, 03:09 AM
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CC Member
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Join Date: Aug 2013
Location: Sydney,
NSW
Cobra Make, Engine: DRB Windsor 302 stroked to 347
Posts: 133
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Not Ranked
15s if your car is more traditional looking, 18s if using for racing performance purposes.
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02-13-2014, 04:47 AM
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CC Member
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Join Date: Jul 2010
Location: McMurray,
PA
Cobra Make, Engine: Superformance #522
Posts: 528
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Not Ranked
Quote:
Originally Posted by Dimis
Buy a set of 15s with Billboards for the look and then a set of 18s for racing around on...
Win/Win.
Me, I'm a 15s original guy, so went with Avons because they are DOT.
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Best option as you can run race 18s and street 15s. SRs for street and R6/A6 for track/autocross.
Last edited by vatdevil; 02-13-2014 at 04:50 AM..
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02-13-2014, 05:00 AM
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CC Member
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Join Date: Feb 2014
Location: Grand Rapids,
MI
Cobra Make, Engine: Superformance #1309 www.spfowners.freeforums.net
Posts: 524
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Not Ranked
Where is everyone buying their tires?
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02-13-2014, 05:19 AM
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CC Member
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Join Date: Feb 2002
Location: Dadeville,
AL
Cobra Make, Engine: Sold my EM.
Posts: 2,459
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Neutral
Here's a thought about tires that I don't recall having seen on this forum. When designing the suspension for a car, engineers consider the contribution of the tires as if they were additional springs. So a car that will run tall sidewall tires with lower air pressure will have more tire spring than a car running short sidewall tires with higher air pressure. I mention this because people who arbitrarily switch tires from what the designer intended are likely affecting both the handling and ride comfort of their cars. ... Admittedly this is neither noticeable nor a problem for most replica Cobra drivers, but it is a consideration for those who put a high value on either maximum performance or maximum comfort.
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Tommy
Cheetah tribute completed 2021 (TommysCars.Weebly.com)
Previously owned EM Cobra
"Never attribute to malice that which is adequately explained by stupidity." - Hanlon's Razor
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02-13-2014, 06:28 AM
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CC Member
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Join Date: Nov 2012
Location: endicott,
ny
Cobra Make, Engine: SPF
Posts: 339
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Not Ranked
Good thread; going to follow it.
I will also be making the leap from 15-18 for multiple reasons.
Going to stick with a wheel that looks as close to what I already have.. as not to draw a lot of attention to the wheel/rim difference.
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02-13-2014, 08:41 AM
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CC Member/Contributor
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Join Date: Mar 2012
Posts: 445
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Not Ranked
I don't get the 18" decision by a lot of different companies. It is the most limited performance tire market compared to 17's and 19's.
Personally, I think the 17's look great on these cars.
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02-13-2014, 09:47 AM
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CC Member
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Join Date: Dec 2010
Location: Allen,
TX
Cobra Make, Engine: Werk77 289FIA
Posts: 1,295
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Not Ranked
__________________
Scratch build 289 FIA see the Scratch builder forum on CC - sold
DRB GT40 MK1 red #49- sold
FF5 Mk4 #7733 302/T5/IRS - dark blue - sold
FF5 MK4 #7812 427/TKO/IRS - Guardsman Blue - sold
FF5 MK4 #8414 501/TKO600/48IDA Ollie the Dragon #91 - sold
FF5 Daytona Coupe 347/TKO/IRS Homage CSX2299 Viking Blue - sold
SPF 2063
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02-13-2014, 10:05 AM
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CC Member
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Join Date: Apr 2011
Posts: 1,092
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Not Ranked
Quote:
Originally Posted by G-Pete
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Too bad Bill wasn't running 18s, he would have done even better. 15s vs. 18s boils down to a very simple question, do you want original looking wheels on your non-original replica or do you want wheels that optimize performance on your non-original replica. One need look no further that what the exotics are using to see where the performance edge is  |
02-13-2014, 10:34 AM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
Quote:
Originally Posted by AL427SBF
do you want original looking . . . on your non-original replica or do you want . . . that optimize performance on your non-original replica. One need look no further that what the exotics are using to see where the performance edge is |
Jeez. Don't be so hard on us! 
Aren't those gauges you use "original looking"?
They certainly aren't the best gauges you can get and certainly not what the exotics are using.
We ALL ride the fine line, no, make that the FAT line of looks/originality vs performance.
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rodneym
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02-13-2014, 11:04 AM
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CC Member
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Join Date: Apr 2011
Posts: 1,092
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Not Ranked
Quote:
Originally Posted by rodneym
Jeez. Don't be so hard on us!
Aren't those gauges you use "original looking"?
They certainly aren't the best gauges you can get and certainly not what the exotics are using.
We ALL ride the fine line, no, make that the FAT line of looks/originality vs performance. |
... last time I checked gauges didn't improve lateral g's  |
02-13-2014, 11:24 AM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Quote:
Originally Posted by buddyg
So I'm torn the classic look of the 15's or the better performance of the 18's?
What say ye?
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If you go 18's, do they make those chrome hooptie spinners for them? |
02-13-2014, 11:27 AM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
15 vs 18
Quote:
Originally Posted by G-Pete
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You put him on 18" Hoosier A6's with proper camber and spring rates and he would pick up 6 seconds a lap. I ran 15" back when they actually made good slicks for 15's (1970's), LMS 16" slicks in the 1980's and 1990's on wider than stock rims (9.5 F and 11 R) and now 18" on (11" F and 12" R) and I can tell you there is no comparison. Yes, part of it is modern compounding but the steering response is so much more precise with low aspect ratio's I would never go back. There is also the problem of tire distortion under high loads
with large aspect ratios especially with poor suspension geometry. There is a reason that the automobile and tire companies gravitated toward larger wheel diameters, they are better. |
02-13-2014, 11:44 AM
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Senior Club Cobra Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 1,226
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Not Ranked
18's on a Cobra look about the same as 26's on a Monte Carlo. Go with 15's for the best look.
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02-13-2014, 11:45 AM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
Quote:
Originally Posted by AL427SBF
... last time I checked gauges didn't improve lateral g's |
Fair enuff.
__________________
rodneym
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