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View Full Version : Best Tire Size for Cobra R 17x9



Macros
09-11-2009, 09:37 AM
OK, I see a hundered posts on here about tire size for Cobra R 17x9's with slightly different recommendations.

At this point, I am keeping my 95 at stock height, but the 245/45/17's that came on the wheels look way to small, so I am going to replace them with new tires.

From what I am reading, it seems the best size is 255/45/17's or 255/50/17's.

From your experience, which would look the best to fill the gap? Which would give the best ride? Would both throw off my speedometer? And down the road, which would be the better choice if I do drop the car 1.5"?

rzimmerl
09-11-2009, 09:45 AM
I recently just picked up a set of Cobra R's with 255/50 and they look good. That size really fills in the fender well. I recently just installed 1.6" lowering springs and looks even better, big meats, low car, and small fender gap.

Macros
09-11-2009, 11:52 AM
Thank you!

Going with a set of Fuzion 255/50/17's then!

DrFishbone
09-11-2009, 12:43 PM
Thank you!

Going with a set of Fuzion 255/50/17's then!

I'm not sure what the ride like new, but I have a set of Fuzion's on my wife's 2003 Mustang GT with the torque-thrust type wheels...they ride and sound like crap even though they only had "about 2500 miles on them" when we bought the car :rolleyes: They still have about 40-50% tread and feel like they have flat areas that won't round out...plus they sound like a 4x4 with mud tires driving down the road. :rolleyes:

Those are the only Fuzion's I've ever experienced, and don't know the particular set's history...but just thought I'd let you know, since you're looking at around the same size & brand tire.

rzimmerl
09-11-2009, 01:00 PM
My rims came with Kumhos on them with some decent rubber, they are OK but don't seem to have great traction. When I get new tires I will be replacing them with Nitto 555's

David Neibert
09-11-2009, 01:01 PM
With those same wheels on my 93 SC I'm using 245-45-17 up front and 275-40-17 on the back. In the past I've had 255-45-17 on all four wheels and that worked well too.

This is what my 91 looked like with 255-45-17s on all four wheels (stock ride height).

http://www.sccoa.com/member/images/neibert2.jpg

This is what it looks like with 245-45-17s on front and 275-40-17s on the back (stock ride height).

http://members.tccoa.com/dneibert/IM003590.jpg

David

Macros
09-11-2009, 01:41 PM
Dave,

What brand of tires are you running there?

David Neibert
09-12-2009, 02:50 AM
Dave,

What brand of tires are you running there?

Nitto

David

Macros
09-16-2009, 04:42 PM
Out of curiosity, do these wheels need special lugs nuts, or will the stock SC nuts work fine?

David Neibert
09-16-2009, 05:00 PM
Out of curiosity, do these wheels need special lugs nuts, or will the stock SC nuts work fine?

You will need new chrome acorn style lug nuts. Stock lug nuts will probably fit, but will look like crap.

David

Payton
09-16-2009, 06:35 PM
With those same wheels on my 93 SC I'm using 245-45-17 up front and 275-40-17 on the back.
David
Hey David, with 245/45/17 up front weren't you getting a slight body vibration? I heard that with Cobra R's in combination with that tire size you are most likely to struggle with vibration.

David Neibert
09-17-2009, 12:07 AM
Hey David, with 245/45/17 up front weren't you getting a slight body vibration? I heard that with Cobra R's in combination with that tire size you are most likely to struggle with vibration.

Nope...had the car up to 130 mph on the track in Joilet a couple months ago and it was very smooth. I don't recall ever hearing about anyone having a problem using that size with Cobra Rs.

http://www.sccoa.com/forums/attachment.php?attachmentid=38561&d=1248800221

David

MustangJake88
09-17-2009, 01:04 AM
Stay away from Wanli and Yokohama tires. I had Yokohamas on my '87 5.0 Mustang and my Dad had Wanlis on his '90 5.0 Mustang and they do not hook up for crap and they are very loud going down the road. Both of these tires had the same exact tread pattern. I just think the Wanli was a Yokohama knock-off. Now, on the other hand, I switched to Michelin Pilots and those suckers were awesome! They had better be for over 200 bucks a tire!

Macros
09-29-2009, 06:00 PM
OK.. Had the new Fuzion 255/50/17's installed today, but they barely clear the spindle! I am also getting some rubbing, but only on turning left.

Car is still sitting at stock height. Any ideas? This may limit me from bringing the car to the shootout :(

Macros
09-29-2009, 09:49 PM
Could this just be the control arm bushings being worn out?

rzimmerl
09-29-2009, 10:38 PM
Where is it rubbing at? My car is lowered 1.6" and is about the same distance to the spindle. I have noticed that I am getting a small rub in the passenger rear fenderwell plastic and thats it.

Belisarius
09-30-2009, 01:33 AM
Just installed 255/50 17 rubber on Bullit style 17x9 rims. Unfortunately the car is still in the shop. They say tomorrow...

I picked 255/50 17 as that's the closest to stock diameter I could find for a 17x9 wheel at a reasonable price.

Macros
10-01-2009, 03:22 PM
Hey Belisarius... How did yours look when you got it back. I have about a 1/4" or less clearance from the front tire...

Tim Groth
10-01-2009, 03:39 PM
I have 245/45/R17 Nitto 555's on my 17x9 Cobra R's and have had zero issues...car has been lowered 2" on all 4 corners and rides very nice.

Nitto's are the best tires I've ever owned for traction and tread wear.

-Tim

AutobotGears
10-01-2009, 06:02 PM
Man, you gotta paint those calipers. With those rims on, the calipers do not look good at all:-)
Trevor

Macros
10-01-2009, 09:21 PM
I know!!!

I just installed the rims and tires. Exhaust going on next week. All new brake upgrades going on over the winter.

Amazing how the stock wheels covered all that up!