I am thinking that I want to run Hankook V12's on a set of Z06 C5 wheels. The tire specs are:

------------------ Size ------- Rim ------ Section ------ Tread ---- Diameter ----- Revs

------------------------------- width ------ width-------- width --------- -----per mile

------Stock
------Front------ 265-40-17------ 9-10"------- 10.5"------- ?------ 25.4"------ 824

------Hank'-------255-40-17------ 8.5-10------ 10.2"------ 8.7------ 25" ------ 830
------Front

------Stock
------Rear ------ 295-35-18----- 10-11.5" ----- 11.7" ----- 10.2"------ 26.1"------ 801

------Hank'------ 285-35-18 ----- 9.5-11"----- 11.4"----- 9.8"------ 25.9" ------ 803
------Rear


Anybody see any glaring problems associated with the somewhat smaller Hankook sizes? I took this info off the Tire Rack and Discount Tire sites. I personally don't mind giving up a little tread width as I'm not looking for the ultimate in tire grip. I need to keep the budget low for a while. Wide body flares and bigger wheels will have to come later.



Sorry this is so hard to follow. I spent 30 minutes trying to get this to look right and it still came out wrong.

 

Wow, I think you might be over researching this a bit, really confusing info and not all necessary.
If your sticking with the stock rims, just go with the sizes the calculator shows for your specific car on the Discount tire website.
But if your changing wheels, thats a different story.
I'll see if I can find my info on my V12 sizes, but I bumped the wheel size too.

 

From what I can see the difference from stock is a 27 rpm difference front to back on the new tires, and a 23 RPM difference front to back on the stock tires.
I seriously doubt you will have any problems with that combo.
My tire sizes are 245-40-18 & 275-35-19
Wheels are 19X10 & 18X9.5

 

You'll be fine...

 

Why would you want to go a smaller tire over stock?

 

Smaller tire, he'll be able to spin the crap out of them!!
Good thing they aren't expensive!

 

 

I don't have your wheel sizes but for what it is worth... I run a 265/35/ZR18 in the front with no issues.

As someone who is currently running Hankook V12's, I think for the money, you will be pleasantly surprised to see how well these tires perform.

 

I don't see why you couldn't run those, but I would just stick with the stock sizes. Is the difference in price all that much for the bigger size?

 

The size on OEM rears for your car was 26.7", almost a full inch taller than the size you're looking at. The smaller diameter Hankooks will give you better gearing, but your wheel wells will look slightly less full. I personally would go with a taller tire closer to OEM size. JMO.

 

tire height differences could screw up the abs sensors i think.

 

i like my v12 as well. they grab pretty good

 

The info I got from the tire sites may not be accurate but it showed the OEM rear tire diameter as 26.1" and the closest in Hankook's was the 285-35-18 at 25.9". If that info is correct I'm not sure anyone could visually tell the difference of .2"? If anyone knows any of the info I gleaned from Tire Rack to be wrong let me know.

 

I don't want to go smaller but I'm in the position of needing tires now and the prices for stock C5 Z06 tires would really push the budget limits right now. I know you shouldn't buy a performance car if you can't afford the up keep but I couldn't resist. Only other option right now would be to park it till money is a little easier to come by. The "cord" is showing on the inside edge of the two front tires so an alignment is in order too.

 

Yea, that's, it I'm going from wagon wheels to Z06 wheels.

 

Per Tire Rack, OEM tire size diameters (for non z06 models) are 25.6" front and 26.7" rear with Goodyear runflats. I don't have personal experience, but I would think putting on rear tires with a 25.9" overall diameter would be noticeable smaller.

 

but based on your avatar, i'm assuming you have a 99 FRC - not a Z06
the Z06s had shorter tires than regular models. those Hankooks you're looking at are .8" shorter in the rear & .6" shorter in the front. it'll leave your wheel wells looking a lot emptier & it'll gear your final drive ratio down a bit

your car's normal sizes are 245/45-17 & 275/40-18

 

We're having a slight communication problem here. A lot of comments seem to be relative to my stock wagon wheels. My wagons will be history soon. I have oem C5 Z06 wheels to put on my 99 FRC. The tires I have listed in my opening post are the Stock Z06 specs and specs for the closest size available in the Hankook V12 series. I'm finding from my search that there would be very little difference in size between those two options. 2 tenths of an inch in height in the rear and 5 tenths of an inch more narrow in the rear. Since the body and frame of my FRC and that of a Z06 are the same the comparison is just about the different tires on Z06 wheels, not the standard wheels or tire specs the FRC originally came with. I still haven't made up my mind to do this, I was hoping someone else had been the pioneer taking this route.

 

so it sounds like you ain't quite on the same page with the rest of us. your car don't care what wheels you're using or what came on a Z06. it's programmed to use the same tires as every other coupe & convertible that were built in 99 when your car was... unless you've had the computers manually reprogrammed for Z06 tires front & rear.

the Z06s had shorter tires than the other models (including the FRC), so when swapping from stock tires on wagon wheels to any other tire on any other wheel, you have to compare the new tire sizes to your stock 245/45-17 & 275/40-18 because that's what your car's expecting to see.

 

You will have a little better effective gearing, but your speedometer will read slightly faster, your odometer will rack up slightly more miles than actually traveled, and your wheel wells will probably look a little less filled. Not worth those tradeoffs if you ask me. Just make sure to find some pictures of guys running that tire size and be certain you will be happy with it.