celicacobalt

my 2 stock tires are dangerously bald at this point and i have to do something about it right away, i have the stock 17 inch ss rims on my car and i have 2 tires left form an old set of 17's that i was wondering if they would fit on the cobalts 17's? here is the numbers from the side of the tire: 215/45zr17 87w (falken ziex) .... here is the numbers i got off the side of my stock pirellis just in case yuou need to know: p205/50r17 90h ... thanks for the help i really appreciate it.

Halfcent

Couple things...

How many miles / what kind of driving are you doing on a one year old car that your tires are already shot?

Why are only 2 tires bald? Did you not rotate them?

Yes, the tires you listed will fit your rims, however if you only put on two of them, they will not match the size of your other 2 tires. Don't do that.

Just buy yourself a fresh set of 4.

celicacobalt

well im only doing normal driving most of the time except on the rare occasions when i got to the drag strip. although for the first 2 months i had the tires at 50 psi until i realizzed that was not the specified pressure that was the max pressure so that might help make them bald i guess, also i didnt rotate them until today when i put them on the back wheels so now the front wheels have tread . and what would the problems be if i had those 2 sets of tires on at the same time with cautious driving? im trying to figure out if i can afford a set of 4 tires right now so i dont know but well see.

Halfcent

You really should have been rotating. But no use crying over spilled milk. There is no safety issue as long as you keep the same size tires on a single axle.

You don't want to bother putting on the other tires because you are going to get charged by a shop to have them mounted. If you buy new tires, usually a shop will mount them for free. So you can spend money putting on mismatched tires and looking ghetto, or you can spend money and do it right.

celicacobalt

my uncle owns a tire shop and will put them on for free so that will work in my favorite and yeah these will stay on the same axle temporarily, i plan on getting rims and tires as a package but im still putting in some extra ot to try and afford it. an yes i will start rotating when i get the new rims and tires. what is it every 3000 miles?

denniss

You might have a problem with T/C and ABS if you use different size tires. The wheel sensors will pick up different wheel speeds because of the different diameters.
Dennis

celicacobalt

even if they are both 17 inches?

2K5SS/SC?

Just make sure that the two drive wheel (front) tires are the same size. If not you may ruin your tranny. Put the 215/45/17's up front and the 205/50/17's out back until you can afford a set of 4 new tires.

ItalianJoe1

iTrader: (10)

They should be almost the same sizeStock Tire - 205/50R17 >Search Tires Tire 1 - 215/45R17 >Search Tires
Section Width: 8.07 in 205 mm
Section Width: 8.46 in 215 mm

Rim Diameter: 17 in 431.8 mm
Rim Diameter: 17 in 431.8 mm

Rim Width Range: 5.5 - 7.5 in
Rim Width Range: 7 - 8 in

Overall Diameter: 25.07 in 636.77 mm
Overall Diameter: 24.61 in 625.09 mm

Sidewall Height: 4.03 in 102.36 mm
Sidewall Height: 3.80 in 96.52 mm

Radius: 12.53 in 318.26 mm
Radius: 12.30 in 312.42 mm

Circumference: 78.75 in 2000.2 mm
Circumference: 77.31 in 1963.6 mm

Revs per Mile: 829.6
Revs per Mile: 845.1

Actual Speed: 60 mph 100 km/h
Speedometer1: 61.1 mph 101. km/h

Speedometer Difference: - Speedometer Difference: 1.868% too fast
Diameter Difference: - Diameter Difference: 1.84%

Less than 2% difference. You will be fine for now.

celicacobalt

cool, thanks guys, hopefuly this will only be like this for a short time.

rally

All Falken tires wear fast, so keep that in mind. They're a very soft tire.

I suggest a Michelin Performance tire, or i like the Bridgestone HP 50's

NOOTCH621

Mixing and matching new and old tires will seriously affect the way you ride drives. They'll fit, but I would not recommend flip floppin' tires

sptbkfn01

THIS WILL DEFINATELY HAPPEN!!!!!!!!! 06SSCCA (I think that's right) went with the ghetto look for awhile and said that his ABS was completely screwed up. I forget the two sizes that he was using, but the front were a lower profile than the rear and he said that every time he would stop from normal speeds (40 mph or so), the car would violently shake because the ABS was activating.

celicacobalt

well guys i did it this morning and well to be honest i cant feel a difference in the cars driving ability so maybe they were a close enough match, feels stock to me and no abs acting up at all. ill update you in anything happens but i dont forsee it. and yeah i know falkens wear fast so if i keep these rims then i have to find a tire that meets in the middle with durability and performance while not being super expensive.

Tomtwtwtw

Seems to be the general consensus, but I'll add my 2 cents...

You're fine adding those tires, just keep them on the same axle. I would recommend adding them to the front. If you go to the strip often, you'll appreciate the traction the wider Falken provides. Just be careful with the side to side moves until you get a feel of how the car handles. Most likely it will be very similar, but there may be differences you don't anticipate.

celicacobalt

yeah, right now they are in the back. i might think about moving them when i go back to the track in october.

RaineMan

man... if I were you... skip the track for a month and buy yourself a set of tires.

if you're going to the track that often... consider an extra set of rims with some tires just to burn at the strip.

celicacobalt

i only go to the track once every couple months and it costs $20 not enough to buy new tires. i dont really hurt the tires too much when im there anyway considering i have an auto tranny