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04-17-2003, 01:06 PM
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CC Member
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Join Date: Jan 2002
Location: Northridge,
CA
Cobra Make, Engine: Arntz Cobra
Posts: 1,838
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Not Ranked
New 15 inch Tire!
I have just found these on TireRack.com. They are Kumho Ecsta STX. They come in 275/60/15 (good for the rear) and 255/60/15 (good for the front). AND they are "H" rated (130 mph). The dry traction rating is 9.2. Definately worth a look. I may have to buy some fronts to replace the slightly too large Toyos I have there. Any comments or feedback about Kumhos would be appreciated.
Paul
__________________
"It doesn't have anything on it that doesn't make it go faster."
Last edited by RallySnake; 04-17-2003 at 01:09 PM..
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04-17-2003, 01:27 PM
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Renegade Nuns on Wheels
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Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
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Not Ranked
Darn it!
That makes me mad! I was going to get these tires before I bought the Hoosiers and I was told that the 255 had been cancelled!
Please note that Tire Rack shows them as back order. I think these are going to be the best "crusier" 15" out there. Kumho makes a good tire at a great price point. These are not going to be ultra high performance tires but I suspect that they will make a very good street tire.
Get a set and let us know!
Rick
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04-17-2003, 03:03 PM
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CC Member
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Join Date: Jan 2002
Location: Northridge,
CA
Cobra Make, Engine: Arntz Cobra
Posts: 1,838
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Not Ranked
Rick,
I just talked to a local tire shop and they checked with their distributors. They said that the 255 is a brand new tire and they should be available for delivery in about 30 days. They expect the price to be about $100.00 each.
Just get another set of rims for touring.. 
Paul
__________________
"It doesn't have anything on it that doesn't make it go faster."
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04-17-2003, 03:30 PM
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CC Member
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Join Date: Jul 2001
Location: Senoia,
Ga.
Cobra Make, Engine: 427SO with big twin autolite inlines on custom intake, jag rear, top loader, wembeldon white, guardsmen blue stripes
Posts: 3,155
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Not Ranked
What's the difference between 255's
and 295's...........
__________________
Perry
Remember!, there's a huge difference between a 'parts' changer, and a mechanic.
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04-17-2003, 03:41 PM
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CC Member
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Join Date: Jul 2001
Location: Senoia,
Ga.
Cobra Make, Engine: 427SO with big twin autolite inlines on custom intake, jag rear, top loader, wembeldon white, guardsmen blue stripes
Posts: 3,155
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Not Ranked
__________________
Perry
Remember!, there's a huge difference between a 'parts' changer, and a mechanic.
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04-17-2003, 03:45 PM
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CC Member
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Join Date: Jan 2002
Location: Northridge,
CA
Cobra Make, Engine: Arntz Cobra
Posts: 1,838
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Not Ranked
Perry,
The 255 or 295 number is the measurement of the widest part of the tire in millimeters. The 295 mm or 275 mm tire fits nicely under the rear fender of a Cobra but they are a little large for the front. My 275 mm wide front tire is about an inch outside of the fender flare. The usual front tire on a Cobra is a 245 mm. To me this is a little too small and I have trouble getting balanced handling. The 255 mm wide tire should be about perfect, with the widest part of the tire even with the edge of the fender, the height (60 aspect ratio) exactly 1 inch shorter for a nice rake and better aerodynamics. The tread width is less than an inch narrower than the rear so handling balance should be attainable.
There have been NO street tires speed rated better than "T" (118mph) available for a while. With the motor you have, that can happen in a matter of seconds coming up the on-ramp of a freeway. The "H" rating means the tire has been tested at 130 mph for hours. That's the kind of quality I want to have under me when the scenery start blurring!
This could be very good for us. Way to go Kumho!
Check out:
http://www.tirerack.com/tires/Spec.j...odel=Ecsta+STX
Paul
__________________
"It doesn't have anything on it that doesn't make it go faster."
Last edited by RallySnake; 04-17-2003 at 04:10 PM..
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04-17-2003, 04:32 PM
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CC Member
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Join Date: Feb 2000
Location: San Antonio,
TX
Cobra Make, Engine: Former owner: JCF 289 slabside, ERA #329 and 424, GTD "Essex Wire" GT40; currently enjoying Hi-Tech 427 #147
Posts: 1,822
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Not Ranked
I have some "Z"-rated Kumhos on one of my little Italian cars. They went on in place of some archaic Michelin TRX's and instantly improved the ride and handling tremendously--
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04-17-2003, 05:12 PM
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Banned
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Join Date: Jan 2003
Cobra Make, Engine:
Posts: 1,085
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Not Ranked
I have been doing a lot of research on tire sizes etc. . .
Here is what I found out: Contact patch!
The BF Goodrich T/A 295-50R-15 contacts the road with 9.5 inches.
The Dunlop SP Sport 8000 255-50ZR-16 contacts the road with 9.4 inches
The Firestone Firehawk SZ50 255-50ZR-16 contacts the road with 8.1 inches.
So tire size numbers does not tell the whole story, contact patch is what really matters, because that's what actually hitting the road. . . . It has to do with the sidewall curvature.
Tire Rack gives you all these specs for each tire. Some tire manufacturers, like Michelin do not publish these numbers. . . I don't know why. Maybe it's because they're small. . . .
Let me know if you have any questions.
Personally, I like the higher speed rated tires for steering response and better overall handling, not for the speed potential, because I don't plan on driving at 150 + If I did, I'd run race tires in a closed track. . . .
Just my 2 cents worth.  |
04-17-2003, 05:21 PM
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CC Member
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Join Date: Jul 2001
Location: Senoia,
Ga.
Cobra Make, Engine: 427SO with big twin autolite inlines on custom intake, jag rear, top loader, wembeldon white, guardsmen blue stripes
Posts: 3,155
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Not Ranked
TOYO proxies 295 and 255 in 15 inch, anyone run these??
__________________
Perry
Remember!, there's a huge difference between a 'parts' changer, and a mechanic.
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04-17-2003, 05:30 PM
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CC Member
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Join Date: Jul 2001
Location: Senoia,
Ga.
Cobra Make, Engine: 427SO with big twin autolite inlines on custom intake, jag rear, top loader, wembeldon white, guardsmen blue stripes
Posts: 3,155
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Not Ranked
I believe you can get them in H and V rated.
__________________
Perry
Remember!, there's a huge difference between a 'parts' changer, and a mechanic.
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04-17-2003, 06:53 PM
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CC Member
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Join Date: Jan 2002
Location: Northridge,
CA
Cobra Make, Engine: Arntz Cobra
Posts: 1,838
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Not Ranked
Perry,
Please tell me where you got that information. I have looked at the toyo.com website till my eyes hurt and have not seen these sizes. I am currently running 275/60/15 Toyo Proxy S/Ts all around and would really like to find a 255/60/15 for the front. That's why I was excited about finding the Kumhos.
Paul
__________________
"It doesn't have anything on it that doesn't make it go faster."
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04-18-2003, 01:26 AM
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Senior Club Cobra Member
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Join Date: Nov 1999
Location: Folsom,
CA
Cobra Make, Engine: ERA 623, 427 S/C Cobra. Ford FE 428 Cobra Jet, Ford Nascar TL 4speed - with a touch of raw; "less is more" theme
Posts: 3,882
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Not Ranked
re
427/SO,
I believe this is a Dueller HP truck/SUV sport tire. I wonder if anyone has tried these (being they are "H" rated) ???? The fact they make a 295/50/15 "H" rated might be worth a test-try for the price. The tread is not the greatest looking, but I guess we'll take what we can get when it comes to H or better in a 15" 295 width.
Anyone tried these 295 HP/Duellers on the rear of a Cobra yet?
__________________
Duane
Western States Cobra Group 1998-2016.
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04-18-2003, 02:15 AM
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CC Member
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Join Date: Jul 2001
Location: Senoia,
Ga.
Cobra Make, Engine: 427SO with big twin autolite inlines on custom intake, jag rear, top loader, wembeldon white, guardsmen blue stripes
Posts: 3,155
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Not Ranked
Paul, see above.
I agree with duane on the tread, it just stands out a little to much or something?
__________________
Perry
Remember!, there's a huge difference between a 'parts' changer, and a mechanic.
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04-18-2003, 07:58 AM
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CC Member
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Join Date: Oct 2000
Location: Los Angeles - Pacific palisades CA,
Posts: 19
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Not Ranked
If these Kumho Ecsta STX's work, I can keep my nice 15" wheels! Yippee!
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Marty Harris mharris@linkline.com
Just remember, once you're over the hill you begin to pick up speed.
Charles Schulz
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04-18-2003, 12:48 PM
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CC Member
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Join Date: Apr 2003
Posts: 85
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Not Ranked
That's great!! You guys are great!! Any suggestions on protectants to use to keep those Kumby Ya's looking their best? I'm torn between a 295 and a 275 for the rear of my Butler. Dont have wheels picked out for it yet, "work in progress", but I think I'm going to stick with 15's, so any research you guys can do on the limited choices in size 15 is really appreciated. Back spacing=dizziness+fortitude!
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04-18-2003, 12:52 PM
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CC Member
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Join Date: Jan 2002
Location: Northridge,
CA
Cobra Make, Engine: Arntz Cobra
Posts: 1,838
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Not Ranked
Hey guys,
Under the picture of the Bridgestone Duelers is this note: Load-Speed Rating/OEM Fitment: 105T. That indicates 'T' rating (118). And, there is no matching tire that will fit the front.
I must not be making my point clear. I (and many of you) want to find a full set of tires that will fit 15" rims on a Cobra and work properly. Manufacturers will not sell us a car that will go faster than the tires are rated. For instance, if you buy a new Mustang with 'S' rated tires (112 mph), the computer will prevent you from driving faster than 108 mph. I know, I rented one!
Our cars do not have limits set by computers (mostly). With the power to weight ratio of a Cobra, the top speed is limited by either the gear ratio or aerodynamics. With my tremec 5 speed, my car will theoretically do 195 mph at redline. Practically, it will do 140 very nicely. If a tire comes apart at that speed....well just take a look at the Silver States Classic open road race, people get killed.
I would love to buy 'Z' rated tires and not worry any more. But, nobody sells them for 15" rims. The best I can find are pure racing tires that are expensive ($600 to $1,200 per set) with very little tread. They last a few thousand miles and then you have to buy another set. I want tires that I can afford and that will last for a year or maybe two and that I feel safe with at 100 plus in the middle of nowhere. I visit there often.
The Ford Lightning truck stimulated tire manufacturers to produce a better 15"tire. There are only a few that are 'H' rated (130 mph) that will fit the rear of the Cobra but none that fit the front correctly. For instance, the Toyo Proxy S/T is 'H' rated and comes in two 15" sizes. The 275/60/15 and the 295/50/15. Either one fits the rear of the Cobra fine. However the 275 is more than an inch taller than the 295 so you don't want to run the 275 on the front and the 295 on the rear because the rake of the car will be nose up. The best I have been able to do is run the 275s all around.
The significance of the new Kumho tire is that you will be able to run 255/60/15s in the front and 275/60/15s in the rear and everything should fit correctly, give nose down attitude and be safe, up to the practical limits of the car. They also have stiff sidewalls (read good handling) and great traction ratings.
If you feel that this is not important, fine. To me, it is a matter of life or death, I drive pretty fast. We are driving cars that rival the best world class supercars in performance. To actually use that performance, and live to tell about it, you need the right tires.
Paul
__________________
"It doesn't have anything on it that doesn't make it go faster."
Last edited by RallySnake; 04-21-2003 at 11:50 AM..
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04-18-2003, 01:23 PM
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CC Member
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Join Date: Jun 2001
Location: taxmehard,
Ca
Cobra Make, Engine: Compomotive. 351w, close ratio four speed, live axle, 4wdb.
Posts: 226
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Not Ranked
Great information all, Thanks!
Have you seen a similar high speed rated tire in the 305/15" Size?
I run euros now but the tire shop reamed a hole in one to install a plug ( I didn't know !) and I need to replace it.
Thanks
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Tinman
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04-18-2003, 01:28 PM
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CC Member
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Join Date: Jan 2002
Location: Northridge,
CA
Cobra Make, Engine: Arntz Cobra
Posts: 1,838
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Not Ranked
Mark,
I don't know that you'll ever find any more Euro's. They're history. Find a "good" tire shop and have them get rid of the plug and put a patch on the inside. As long as ithe hole is in the tread area, not the sidewall, it'll be fine.
No 305s, yet.
Paul
__________________
"It doesn't have anything on it that doesn't make it go faster."
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04-19-2003, 02:12 PM
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I feel the need for speed
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Join Date: Oct 2001
Location: San Francisco East Bay,
Posts: 332
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Not Ranked
Tires
Paul...
I agree completely!!....Tires are a matter of life and death....There are not many 15" tires that are "safe" at over 110 mph. I am running Hoosier racing tires currently and they are EXPENSIVE!!!.....Hoosier has given indications that they would produce tires for 15" that are more of a high performance tire ...IF.....there is enough call for them!!
I would encourage the Cobra community to work together on some appropriate tire specs and go to the different manufacturers..including Hoosier...
If you make them.....they will come!!
Mike
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04-19-2003, 08:24 PM
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CC Member
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Join Date: Jan 2002
Location: Northern California,
CA
Cobra Make, Engine: -Sold- Contemporary 427S/C # CCX-3152 1966 427 Med Rise Side Oiler, 8v 3.54:1 Salisbury IRS, Koni's.. (Now I'm riding Harleys)
Posts: 2,567
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oh well. It's only money
Doh..
And here I just spent $1300.. on 17" tires.. and $650. on 15's.. live and learn.. Has anyone seen the 23" Kumho tires..
Oh yea.. If you want tires in 15" I have a set of BRAND NEW 235/60 and 295/50 Goodyear Eagle GTII's I am GIVING AWAY FREE.. Of course there is a catch.. You have to buy the Trigo wheels they are mounted on, also new Trigo Cobra II wheels.. 7.5" and 9.5" with a 3.5" offset.. Photo's in my gallery..
I have $1850 in the wheels.. $1600 plus shipping and tax.. Give me what I have in the wheels and the tires are yours.. Mounted, balanced ready to run..
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michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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