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View Full Version : Thinking of buying 18" cobras, would like opinions on what tires to run



mywhite89
05-04-2015, 06:49 PM
So, for rear tires sounds like 275/40/18, fronts 245/45/18 look to be a good fit. For the questions:

Will the rear tires work without rubbing?

What kind of tires do you recommend?

I am mostly doing this to improve the handling and look of the car, but the 235/55/17's Toyo proxes 4's I have on it now have absolutely no traction in 1st and 2nd at any time, and forget actually going through the gears with it. I would like a street tire, but if gripping isn't possible, then I will switch to drag radials. I would just rather have something with a little more street characteristics being that I drive the car long distance a few times year.

chris

dthompson
05-04-2015, 07:05 PM
I just went 275 40 18 nitto nt05 the street tire not the drag radial version. I rolled the fenders to be safe. I got mixed reviews on whether or not it had to be done.

as for traction, I don't think a street tire will hold first gear. These should hold second gear for me at least.

plethaus
05-04-2015, 09:27 PM
I had Nitto NT05s on my 02 LS1 Camaro and they worked awesome. Nothing will compare to actual drag radials for acceleration, but these were still very good at maintaining grip when launching. The car had Proxes R1Rs when I bought it which I thought were even better but a bit pricier which is why I went with the Nittos.

George95PearlSC
05-05-2015, 08:13 AM
I just went 275 40 18 nitto nt05 the street tire not the drag radial version. I rolled the fenders to be safe. I got mixed reviews on whether or not it had to be done.

as for traction, I don't think a street tire will hold first gear. These should hold second gear for me at least.

What was the feedback you heard regarding the mixed reviews with the 275/40R18 on the rears? Also when you rolled the rear fender wells did the roll fairly easy, and did they chip or flake the paint on the exterior of the rear fender?

Thanks

dthompson
05-05-2015, 09:35 AM
Mixed as in some say fender rolling is needed and some say you dont. Most said you need it. I think the more lowered the car is the more it's needed, Some folks that don't roll them use airbags in the springs instead.

As far as rolling the fenders goes... the pain should only crack on the inside where the tool touches the paint while rolling. I used a heat gun too, but it cracked and flaked off some. I went back with touch up paint to cover it back up so it won't rust. Looks fine from the outside. It is harder to roll because it is two layers of steel spot welded together instead of a single piece. Not that it's hard to do, but I imagine a single layer would be easier. The spot welds don't roll very well and so the end result is not as smooth on the bottom inside of the lip as I would have liked. But nobody would ever see it unless I pointed it out.

George95PearlSC
05-05-2015, 10:08 AM
Mixed as in some say fender rolling is needed and some say you dont. Most said you need it. I think the more lowered the car is the more it's needed, Some folks that don't roll them use airbags in the springs instead.

As far as rolling the fenders goes... the pain should only crack on the inside where the tool touches the paint while rolling. I used a heat gun too, but it cracked and flaked off some. I went back with touch up paint to cover it back up so it won't rust. Looks fine from the outside. It is harder to roll because it is two layers of steel spot welded together instead of a single piece. Not that it's hard to do, but I imagine a single layer would be easier. The spot welds don't roll very well and so the end result is not as smooth on the bottom inside of the lip as I would have liked. But nobody would ever see it unless I pointed it out.

I understand, that's what i figured! Basically if the car isn't lowered there's no issues and if the car is lowered the issue would arise depending on how much its lowered .... Really appreciate the feedback!

Do you feel the SC look better with the wider tires in the rear or just as good with the 245's all the way around?

David Neibert
05-05-2015, 12:17 PM
Do you feel the SC look better with the wider tires in the rear or just as good with the 245's all the way around?

I think it looks a lot better with the 275-40-18s on the back.

David

David Neibert
05-05-2015, 12:28 PM
So, for rear tires sounds like 275/40/18, fronts 245/45/18 look to be a good fit. For the questions:

Will the rear tires work without rubbing?

What kind of tires do you recommend?

I am mostly doing this to improve the handling and look of the car, but the 235/55/17's Toyo proxes 4's I have on it now have absolutely no traction in 1st and 2nd at any time, and forget actually going through the gears with it. I would like a street tire, but if gripping isn't possible, then I will switch to drag radials. I would just rather have something with a little more street characteristics being that I drive the car long distance a few times year.

chris

Chris,

These are 18" x 9" Cobra Rs with 275-40-18 rear and 245-45-18 front with Volgtland 3/4" lowering springs and air bags fenders not rolled (no rubbing). Tires are Hankook Ventus V12 evo and they are okay, but if doing over I would probably go with Nitto 555s instead.

http://www.sccoa.com/forums/garage_attachment.php?id=3372&attach_type=full

David

dthompson
05-05-2015, 12:31 PM
Looks are a personal opinion. I like the 275s. However the advantages of 245s include cheaper, you can rotate them, and no worries of rolling the fenders.

Here is a pic of mine. I think the 555s might look wider than the nt05 because of the tread pattern, but the NT05 is supposedly a better tire.

63343

George95PearlSC
05-05-2015, 12:58 PM
Looks are a personal opinion. I like the 275s. However the advantages of 245s include cheaper, you can rotate them, and no worries of rolling the fenders.

Here is a pic of mine. I think the 555s might look wider than the nt05 because of the tread pattern, but the NT05 is supposedly a better tire.

63343
Both these cars The Black one and the White one look GREAT! I also like the 275's in the rear fills it out much better!

So if i go with a 3/4" drop or 1.7" drop the air bags will stop it from rubbing and no fender rolling? WOW THAT'S PERFECTLY SWEET FOR ME!!! WOW THE 275's REALLY HIT THE SWEET SPOT ON THESE CARS SEEMS ITS A MUST HAVE IF YOU ASK ME!!!!!:D

George95PearlSC
05-05-2015, 12:59 PM
Chris,

These are 18" x 9" Cobra Rs with 275-40-18 rear and 245-45-18 front with Volgtland 3/4" lowering springs and air bags fenders not rolled (no rubbing). Tires are Hankook Ventus V12 evo and they are okay, but if doing over I would probably go with Nitto 555s instead.

http://www.sccoa.com/forums/garage_attachment.php?id=3372&attach_type=full

David

So if i go with a 3/4" drop or 1.7" drop the air bags will stop it from rubbing and no fender rolling? WOW THAT'S PERFECTLY SWEET FOR ME!!! WOW THE 275's REALLY HIT THE SWEET SPOT ON THESE CARS SEEMS ITS A MUST HAVE IF YOU ASK ME!!!!!

George95PearlSC
05-05-2015, 01:02 PM
Looks are a personal opinion. I like the 275s. However the advantages of 245s include cheaper, you can rotate them, and no worries of rolling the fenders.

Here is a pic of mine. I think the 555s might look wider than the nt05 because of the tread pattern, but the NT05 is supposedly a better tire.

63343

Dave,
Can you send more pics of different angles? :D

I am install 18" Black Chrome Saleen's on mine! :D

Kurt K
05-05-2015, 01:10 PM
FWIW, I have 19" x 8.5" wheels with 275's on them. 1.5" Eibach lowering springs and no fender rolling and I don't rub. I never had air-bags until recently, but those are mainly for when I'm really loaded down or racing. I think fender rubbing has more to do with wheel offset, than tire size and lowering....yes, I know all things play a part.

dthompson
05-05-2015, 01:20 PM
Dave,
Can you send more pics of different angles? :D

I am install 18" Black Chrome Saleen's on mine! :D

Me or dave? I'm Derek if you meant me :)

George95PearlSC
05-05-2015, 01:20 PM
FWIW, I have 19" x 8.5" wheels with 275's on them. 1.5" Eibach lowering springs and no fender rolling and I don't rub. I never had air-bags until recently, but those are mainly for when I'm really loaded down or racing. I think fender rubbing has more to do with wheel offset, than tire size and lowering....yes, I know all things play a part.

Kurt,

You are correct! Question what offset are you running? I will be running 18" X 9" Black Chrome Saleens +32 off set :D

Kurt K
05-05-2015, 02:04 PM
Kurt,

You are correct! Question what offset are you running? I will be running 18" X 9" Black Chrome Saleens +32 off set :DI wish I knew. Brad might know, since I bought my wheels from him.

David Neibert
05-05-2015, 02:55 PM
I think the 555s might look wider than the nt05 because of the tread pattern, but the NT05 is supposedly a better tire.

63343

I like the look of these tires, much more than the Hankooks I've got.

David

George95PearlSC
05-05-2015, 02:58 PM
I wish I knew. Brad might know, since I bought my wheels from him.

Same here i bought mine from Brad too at "The Custom Wheel Shop"

I guess i should be ok then LOL !!! :D

CaifanSC
05-05-2015, 02:59 PM
Chris,

These are 18" x 9" Cobra Rs with 275-40-18 rear and 245-45-18 front with Volgtland 3/4" lowering springs and air bags fenders not rolled (no rubbing). Tires are Hankook Ventus V12 evo and they are okay, but if doing over I would probably go with Nitto 555s instead.



Why the taller tire in the front (45 vs 40) and not rear? I figure rear would need more meat for traction no? PS...I also have the Ventos v12 EVO on another car and I really like that tire...very decently priced too.


FWIW, I have 19" x 8.5" wheels with 275's on them. 1.5" Eibach lowering springs and no fender rolling and I don't rub. I never had air-bags until recently, but those are mainly for when I'm really loaded down or racing. I think fender rubbing has more to do with wheel offset, than tire size and lowering....yes, I know all things play a part.

So no rubbing? Any pix on that? I'd be very interested since my set up in the green car will use Eibachs too.

I'm also just about to buy tires and fender rolling is not an option. Just like George I was going to play it safe and was going with 265s in the rear, but if its a matter of just getting air bags...I may be swayed to do 275s in the rear. Any recommendation on air bags?

David Neibert
05-05-2015, 03:05 PM
Why the taller tire in the front (45 vs 40) and not rear? I figure rear would need more meat for traction no? PS...I also have the Ventos v12 EVO on another car and I really like that tire...very decently priced too.

It's not taller, tires are same height. Sidewall number is a ratio/percentage of tire width, so with an 18" tire a 45 side wall with a 245 wide tire is the same height as a 40 with a 275 tire.

David

dthompson
05-05-2015, 03:05 PM
The tires are the same height. Since the front tire is narrower it needs the taller 45 aspect ratio to maintain the same diameter as the rear. The sizes mentioned are very close to stock tire height.

dthompson
05-05-2015, 03:06 PM
David beat me to it!

George95PearlSC
05-05-2015, 03:10 PM
Why the taller tire in the front (45 vs 40) and not rear? I figure rear would need more meat for traction no? PS...I also have the Ventos v12 EVO on another car and I really like that tire...very decently priced too.



So no rubbing? Any pix on that? I'd be very interested since my set up in the green car will use Eibachs too.

I'm also just about to buy tires and fender rolling is not an option. Just like George I was going to play it safe and was going with 265s in the rear, but if its a matter of just getting air bags...I may be swayed to do 275s in the rear. Any recommendation on air bags?


245/45R18 in front and 275/40R18 in rear are same over all diameter! There both 26.6" tall which is what our cars call for

I am probably going with that combo.. i am close to making a decision!

The reason there the same height is 45 series is 45% of your width which is 245mm vs 40 series which is 40% of your width which is 275mm so by dropping the series on the rears to 40's it maintains the same height because the 275's are wider then the 245's in the front! :D

CaifanSC
05-05-2015, 03:22 PM
245/45R18 in front and 275/40R18 in rear are same over all diameter! There both 26.6" tall which is what our cars call for

I am probably going with that combo.. i am close to making a decision!

The reason there the same height is 45 series is 45% of your width which is 245mm vs 40 series which is 40% of your width which is 275mm so by dropping the series on the rears to 40's it maintains the same height because the 275's are wider then the 245's in the front! :D

Thank you gents for the info! I was really close to pulling the trigger yesterday on 265/40 in the rear and 245/40 front. Glad I waited.

George I'm with you, may end up going with the 275's. The teal car is stock height now so it will most likely not rub...and i guess I'll tackle the air bags when I lower it :).

George95PearlSC
05-05-2015, 03:51 PM
Thank you gents for the info! I was really close to pulling the trigger yesterday on 265/40 in the rear and 245/40 front. Glad I waited.

George I'm with you, may end up going with the 275's. The teal car is stock height now so it will most likely not rub...and i guess I'll tackle the air bags when I lower it :).

Awesome choice! :D

Jimmy 2Coupes
05-05-2015, 04:20 PM
Last week the 18" chrome cobra R's I purchased from the custom wheel shop came and I have been debating 245/45 or 275/40 rear tires all week. I too do not want to roll the rear fenders. The car is lowered 1.5" with H&R springs and I was not sure air bags alone would do the trick so yesterday I pulled the trigger on four 245/45/18" Bridgestone Potenza S-04 Pole Position's from Tire Rack. The tire's were sitting on my back porch when I got home from work today.:D

Micahdogg
05-05-2015, 04:54 PM
Go with 285's!!

http://www.sccoa.com/member/images/serno943.jpg

George95PearlSC
05-05-2015, 07:30 PM
Go with 285's!!

http://www.sccoa.com/member/images/serno943.jpg

micahdogg

Now you really threw a monkey wrench into this just when I was going to pull the trigger and go with 275 on the rear you suggest 285's and boy that looks sweet ! :D

What about rubbing isn't that really pushing the envelope? :confused:

George95PearlSC
05-05-2015, 07:33 PM
Last week the 18" chrome cobra R's I purchased from the custom wheel shop came and I have been debating 245/45 or 275/40 rear tires all week. I too do not want to roll the rear fenders. The car is lowered 1.5" with H&R springs and I was not sure air bags alone would do the trick so yesterday I pulled the trigger on four 245/45/18" Bridgestone Potenza S-04 Pole Position's from Tire Rack. The tire's were sitting on my back porch when I got home from work today.:D

Jimmy

Congrats on the wheel purchase she will look sweet! :D

Jimmy 2Coupes
05-05-2015, 09:14 PM
Jimmy

Congrats on the wheel purchase she will look sweet! :D

Thanks, the Bridgestones looked pretty good. If they would have offered a 275/40 tire in the S-04 Pole Position I may have went that route.

CaifanSC
05-05-2015, 10:14 PM
So browsing tire rack again :) Found the 275/40's for the rear, but the same tire is only offered in 245/40 for the front and not 245/45......before pushing the button I just wanted to check with you guys. Would this be any issue?

nanatothesixth
05-05-2015, 10:33 PM
any body running any 18" foose legend rims?

Jimmy 2Coupes
05-05-2015, 10:34 PM
So browsing tire rack again :) Found the 275/40's for the rear, but the same tire is only offered in 245/40 for the front and not 245/45......before pushing the button I just wanted to check with you guys. Would this be any issue?

That could be a huge issue. The 275/40 would have a diameter of 26.7" and the 245/40's would be about 1" shorter at 25.7". I would not go that route on a ABS equipped car.

plethaus
05-05-2015, 11:39 PM
Other good tire sites are www.discounttiredirect.com and www.tirebuyer.com if you can't find what you need at tirerack.

davec73
05-05-2015, 11:59 PM
Last week the 18" chrome cobra R's I purchased from the custom wheel shop came and I have been debating 245/45 or 275/40 rear tires all week. I too do not want to roll the rear fenders. The car is lowered 1.5" with H&R springs and I was not sure air bags alone would do the trick so yesterday I pulled the trigger on four 245/45/18" Bridgestone Potenza S-04 Pole Position's from Tire Rack. The tire's were sitting on my back porch when I got home from work today.:D You will have to role the fenders or add air bags or the inner fender lip will slice your tires to pieces, no way around it with the wheel offset.

George95PearlSC
05-06-2015, 07:19 AM
So browsing tire rack again :) Found the 275/40's for the rear, but the same tire is only offered in 245/40 for the front and not 245/45......before pushing the button I just wanted to check with you guys. Would this be any issue?

Stick with the sizes I advised for you
front 245/45R18 rear 275/40R18
The guys are right ABS will be an issue...plus it wont look right!
There are plenty of options/products that make matching sets!
You just have to decide if you want to run all season tires or summer tires! :D

mywhite89
05-06-2015, 11:36 AM
Thanks for the information all. David, I seen your post from a while back posting your tire size. Buddy at work has bfgoodrich rival's that are a 200 treadwear tire. He likes them much better than the Nitto's he had before that had the same tread rating. I may look into those for this round. He has a 69 Camaro with a 502bb making similar power to mine I would think.

chris

David Neibert
05-06-2015, 11:49 AM
Go with 285's!!

http://www.sccoa.com/member/images/serno943.jpg

Micah,

The 275-40-18 Hankook rear tires that I've got mounted on the 18" x 9" Saleen style wheels are pretty much worn out, and I'm seriously considering these 285-40-18 Nitto 555R drag radials to replace them. Diameter of the 275-40-18 is 26.66" and the 285-40-18 is 26.98" so only 1.17% larger.

http://www.discounttiredirect.com/direct/tires/nitto/product/submitProductSize.do?pc=40504&tmn=NT+555R+Drag+Radial&typ=Passenger%2FPerformance

David

David Neibert
05-06-2015, 11:57 AM
Thanks for the information all. David, I seen your post from a while back posting your tire size. Buddy at work has bfgoodrich rival's that are a 200 treadwear tire. He likes them much better than the Nitto's he had before that had the same tread rating. I may look into those for this round. He has a 69 Camaro with a 502bb making similar power to mine I would think.

chris

Chris,

I change tire brands pretty much every time I get another set of wheels. Only tire I've ever found that was truly impressive were MT ET drag radials, but they only lasted about 2500 miles and didn't have enough tread depth to handle getting caught out in the rain. I don't really expect to be able to hook up on any street tire, until I'm at highway speeds.

David

mywhite89
05-06-2015, 12:30 PM
CUSTOM WHEELSSHOP 280R REPLICA. Is that the cobra r?

mywhite89
05-06-2015, 12:37 PM
Chris,

I change tire brands pretty much every time I get another set of wheels. Only tire I've ever found that was truly impressive were MT ET drag radials, but they only lasted about 2500 miles and didn't have enough tread depth to handle getting caught out in the rain. I don't really expect to be able to hook up on any street tire, until I'm at highway speeds.

David

I can't believe that David. Its not like your cars are making any power........:)

David Neibert
05-06-2015, 01:40 PM
I can't believe that David. Its not like your cars are making any power........:)

Chris,

I think I might have a problem, because while everyone else wants tires that hook up and go... I'm perfectly content doing burnouts :)

nKaLl_d6u58

David

PS: Why are you selling Sarah's car ?

Micahdogg
05-11-2015, 12:35 PM
Micah,

The 275-40-18 Hankook rear tires that I've got mounted on the 18" x 9" Saleen style wheels are pretty much worn out, and I'm seriously considering these 285-40-18 Nitto 555R drag radials to replace them. Diameter of the 275-40-18 is 26.66" and the 285-40-18 is 26.98" so only 1.17% larger.

http://www.discounttiredirect.com/direct/tires/nitto/product/submitProductSize.do?pc=40504&tmn=NT+555R+Drag+Radial&typ=Passenger%2FPerformance

David

Seems like drag radials make it 10,000 miles for normalish driving before they show cords. By 5000 miles they will feel like you are driving in snow if you go through any rain. So for you kind of driving, I wouldn't want to see rain by 2000 miles :) Other than that, go for it!