Cooper Tires!

[MikDee]

Check out this link:
Cooper Tires! - Hyundai Forums : Hyundai Forum

[Sportage EX]

Thanks for the link, but there are no specifics. What model Cooper tires and as some others said in the Hyundasi forum thread, they don't even make 18" Coopers for a Sportage size, and that came from a guy working in the Hyundai service department, which mentioned they use Bridgestone, which is odd as I thought all of the recent year Hyundais and Kias use Kumhos.

[MikDee]

Cooper CS-4 Touring, and they do make sizes to fit the Sportage.

CooperTiresConsumer - CS4 Touring (T Rated)<span class='trademark'></span>

CooperTiresConsumer - CS4 Touring (H/V Rated)<span class='trademark'></span>

[Sportage EX]

Cool thanks. Any idea on the cost of these 235/55/18 in either T or H/V rated?

I was just looking on TireRack.com and the OEM Hankook Optimos are much cheaper than local places here if someone is looking to upgrade rims and stick with the OEM tires.

Is it possible to swap say 245/40/18s for the 235/55/18s? Reason I ask is there are BF Goodrich Radial T/As in that size for under $100 a pop which is almost half the price of the Hankook tires and are probably better made if BF Goodrich is still made in America.

[spongebob218]

Originally Posted by Sportage EX

Cool thanks. Any idea on the cost of these 235/55/18 in either T or H/V rated?

I was just looking on TireRack.com and the OEM Hankook Optimos are much cheaper than local places here if someone is looking to upgrade rims and stick with the OEM tires.

Is it possible to swap say 245/40/18s for the 235/55/18s? Reason I ask is there are BF Goodrich Radial T/As in that size for under $100 a pop which is almost half the price of the Hankook tires and are probably better made if BF Goodrich is still made in America.

245/40/18s would be way too short, over 2 inches shorter overall. A good option size would be 255/50/18, as it is only about 1/8" shorter overall.

[Sportage EX]

When you say short are you talking width wise or lower profile shorter? If anything I'd prefer to go a bit wider than stock as well as lower profile. I'd like a 50 profile or lower and slightly wider than the 235 width of the stock OEMs.

How about 265/50/18s then if I go with 50 series?

I remember I had an old Tercel that had I think 135/75/13s and I put on 205/60/13s with no problem and the wider tires gave it a much more aggressive stance. Looking to do something similar with the Sportage EX

[spongebob218]

The 265/50/18 would be around 1/4" taller overall, and just over 1" wider.

[Sportage EX]

Is there a formula conversion chart to determine this? I know the middle number is a percentage of the tire width in mm. Were you doing straight math to figure this or is there a quick and easy app online?

[spongebob218]

Sent you a PM with the link.

[Wry 'Cuda]

Originally Posted by Sportage EX

Is there a formula conversion chart to determine this? I know the middle number is a percentage of the tire width in mm. Were you doing straight math to figure this or is there a quick and easy app online?

There are converters everywhere on the Internet, but it's so easy, you may as well "Do The Math" yourself.

e.g. for 265/50-18

18 inch wheel = 18 X 25.4 = 457.2 mm

Width of tyre = 265 mm
Tyre profile = 50%, so 265 X 0.50 = 132.5 mm

Overall height = 457.2 + 132.5 + 132.5 = 722.2 mm or 722.2/25.4 = 28.43 inches.

Deeper treads will add a bit to this.

Effective diameter will be about 97% of the nominal diameter, so final drive revs per km will be:

1000/0.7222/0.97/3.1416 = 454 (or 1.609 X 454 = 730 Revs/Mile)