changing to 20" inch rims - Page 5 - Kia Forum

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post #41 of 59 (permalink) Old 04-04-2015, 02:30 PM
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I had pirelli p zeros on my cobalt ss back in 2006, they lasted 4000km, they were $400/tire at the time, I then put kuhmo uhp tires, can't remember which model. And I got about 18000km on them and they had way better traction. Now remember these are uhp tires so treadwear sucks and I was about 19 at the time so I had a heavy right foot. I will be putting Hankook v12 evos on my forte when the stock tires wear out. So I don't think the pirellis are worth the money but some people do like them so I don't know.... for the sorento, I'm still undecided on what tires to go with if i ever get bigger wheels or change the tires. Heard lots of people don't like the stock kuhmo tires though.

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post #42 of 59 (permalink) Old 04-06-2015, 11:17 PM
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I personally didn't have any issues with the factory installed Kumho City Venture tires, but then again I didn't drive them very long in the snow here in the GTA (Toronto) Canada either. I put on winter tires on the factory wheels and they were being used from the first real snowfall until this upcoming weekend before I put my new(er) 20"s on for the spring/summer after a fresh road force balance job.

I didn't have any issues with the Kumho's as far as traction, durability, road noise or comfort etc. goes, no complaints from me. BUT, I did just trade them and the summer wheels I had them on to upgrade to the 20" wheels and tires, so I can't comment on any long term issues they might have for others. I had a max of about 18,000km on them, and they still looked and felt like new, to me anyways.

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post #43 of 59 (permalink) Old 04-07-2015, 03:23 PM
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Just to be on the least change in overall diameter, nearest to the OEM offset, and tires not sticking out of the car, buy wheels and tires with these specs:

Wheels
20x8.5
+35ET minimum
<29 lbs / wheel

Tires
255/45/R20

I've spent countless hours on the internet about this things and by far this is the best specs to go with a 20" setup.

Try at your own risk though.

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post #44 of 59 (permalink) Old 04-09-2015, 10:08 AM
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I agree,

Be sure to go to 255/45/R20.
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post #45 of 59 (permalink) Old 04-10-2015, 03:25 PM
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If you go with a 255/45R20 on a 8.5" x 20 rim with +38 offset, it will be very close:

Diameter 739.2mm 737.5mm
Circumference 2322.3mm 2316.9mm
Poke 45.3mm 70mm
Inset 145.3mm 146mm
Speedo error 0% 0.23%
Reading at 30mph 30mph 30.07mph
Reading at 60mph 60mph 60.14mph
Ride height gain 0mm -0.85mm
Arch gap loss 0mm -0.85mm

You can mess with the figures to get the look you want (less or more sidewall, sticking out more or less, wider look from the front/rear of the treads etc. and if you pick the correct sizes, you'll be within 1mph of the oem wheels and tires, which isn't bad.

As long as you're within 1-2km/h or 1mph it shouldn't mess with the engine computer, speedometer, odometer etc. More sidewall or a wider tread across the top will increase your sidewall % as well, and you'll get a smoother softer ride, and less will give you a rougher ride but sportier feel and better cornering. But these aren't race cars lol, they're big heavy suv's right?

Good luck! 20's look nice on these Sorento's

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post #46 of 59 (permalink) Old 12-01-2015, 08:48 PM
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question for the experts

i live in southern california and just bought a 2016 sorento lx v6 with awd in snow pearl.

i want to get 20" or 19" rims put on the car...american racing vn806s in black satin to be exact (sorry but the forum won't allow me to post a picture or link to the rims).

with these tires:
for the 20s: falcon ze950 255/45/R20, or 245/45 or 50/R20...... or for the 19s: same tire in a 245/50 or 55/R19

the whole thing will cost me about $1750 with the 20s ($1000 on the rims and $750 on the tires), and a bit less with the 19s (maybe $1500 total).

however, i have never done anything like this before, and am concerned about so many issues (but especially about everything fitting correctly in the wheel well, and fitting with the awd etc.)

now i'm studied for several hours, and even cut and pasted all of your expert comments and sent them to the shop where i'm having the work done (especially some posts by: @gdi 3.3 l, @greatauror28 , and @The Wizard ), but i was wondering if i could get some direct input/advice.

1. i'm seeing different opinions about the decrease in comfort with lower aspect tires, with some saying that there's a negligible difference and others saying that it's very noticeable. from my side, i favor increased performance (and good looks), over cushiness, but don't want to be feeling like i'm driving a go cart, or bottoming out every time i hit a bump in the road.

2. i've seen concern expressed over hitting the inner fender (or perhaps other things while turning), and so i'm wondering if any of these configurations will run a risk of screwing up the actual drivability of the car. fyi, i have 5 kids, so when my family and i go for a ride we have anywhere from 800-1000lbs in the car.

3. also, what do you think about these tires? are they good? comfortable? other suggestions?

4. i like 20s, but could easily go with 19s, if it was strongly advisable not to stray outside of the oem specifications for the vehicle (which has 19s as the largest rim offered on the upper trims)

fyi, i've just begun learning about rims and tires, over the last 24 hours, so i apologize ahead of time for whatever ignorance i display here.

you all seem extremely knowledgable, so any advice would be most appreciated.
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post #47 of 59 (permalink) Old 12-01-2015, 08:51 PM
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post #48 of 59 (permalink) Old 12-02-2015, 02:09 AM
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did you guys find out your offset? lug pattern, wheel size and offset are found behind the wheel sometimes at center bore area..


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post #49 of 59 (permalink) Old 12-02-2015, 08:49 AM
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@kobi411 of course: sorry, i should've given that info. here it is:

for the 20s
size: 20" x 9"
bolt pattern: 5x114.30
offset: 40
b/s: 6.57 (i don't know what this spec is?)
bore: 72.6
load rating: 1680lbs

for the 19s:
size: 19" x 9"
bolt pattern: 5x114.30
offset: 40
b/s: 6.57 (i don't know what this spec is?)
bore: 72.6
load rating: 1400lbs

americanracing.com/wheel/23434/vn806-fastback
americanracing.com/wheelSpecs/6371/1902/23434/vn806-fastback
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post #50 of 59 (permalink) Old 12-02-2015, 09:49 PM
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Willtheyfit.com is a good link to use to play around with offsets.

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