Conti DSW HELP!!!

Z Monster

So i was on tire rack and i had trouble finding the correct size tire of continental extreme contact for my nismo rims.

I could not find 245/40/19 which is recommended for the front nismo rims but
I did find 245/35/19 instead of the 40 aspect ratio.
I did also find the rear tire at 285/35/19 which i will be getting.

My question is regarding the front tire aspect ratio. Should I get 245/35/19? OR 245/45/19 for the front? Please keep in mind I will be putting in swift spec-R springs that will drop my car about an inch. Is it ok if ran 245/35/19 and 285/35/19 with those springs? or do you think more meat in the front would be much better get the 45 aspect ratio?

Im really bummed out that they dont have 245/40/19 for the front tires. Its either i go up 5 or down 5 for the height. Has anyone ran 35 aspect ratio for front and back?

Thanks a lot guys

christian370z

You won't have any problems stepping down to a 35mm side wall, much better than going up to a 45 sidewall. Besides, the 35 is a better aspect ratio for the speedometer accuracy from what I have read although I could be wrong.

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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

azn370z

This size?
http://www.tirerack.com/tires/tires....efore%206/2010

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2010 k23
H&R sport springs / Spc rear camber arms / SSR SP1 / Berk cbe / Varis cf lip / Nismo S-Tune side skirts

ZForce

You should try to keep with the OEM tire ratio as close as possible and also look at the difference between the "Section Width" of the front rear combo you are trying to accomplish. Straying from the OEM Section Width of 1.18 will create more understeer if the difference in section width increases say like to 1.57. I have spent the last two weeks hi-jacking other tire threads asking questions and getting great responses from tire gurus.

I found this Tire Calculator very helpful once I had an understanding of what to look for:

Tire Dimensions Made Simple - Discount Tire

IMO the closest to OEM ratios would be 265/35/19 Fr & 285/35/19 Rr on the Sport Rims.

255/35/19 & 285/35/19 would be my second choice.

265/35/19 & 305/30/19 is ideal but I have heard the tire is too big for the sport rim. Some may disagree though.

245/40/19 & 285/35/19 would be my third option.

Run the numbers on the tire calculator and you will see. You want to punch in three sets of numbers.

First the OEM Fr & Rr

Then punch in the OEM front and say the tire you want to go up to.

Third punch in the Fr & Rr of the tires you want to see the staggered "Section Width" difference. Remember OEM staggered difference is 1.18 and anything higher will create more understeer which is not good. You want a combo that will stay close to OEM 1.18 or a tad lower like 0.78.

Hope this helps and reps to you for opening a new thread. And WELCOME to the SWIFT Club

Z Monster

Thanks Christian370z, that is what i thought.

AZN370z, that is what i saw, but for some reason they did not have it on the chart. Very confusing because they show the 40 height, but its not listed on the chart at all.

Z Monster

Thanks Z force, this really helped out a lot and put things in perspective. I was wondering how to get bumped up on rep or how to rep other ppl. You sir get +1

tsolin01

I have these in 245/40/19 and 285/35/19 on the same rim widths as Nismo rims. They should be available through TireRack unless they've been discontinued for some reason...

__________________
SOLD 12/30/2011 2010 370Z Coupe Monterey Blue 6MT/Touring/Sport/Nav
F.I. CBE CF w/ 12" Res | V1 | SecondSkin | Stillen G3 | EVO-R CF B-Pillars | Volk GT-S Ti Gunmetal 19x9.5 +30 F, 19x10.5 +8 R | Swift Spec-R Springs

Z Monster

Yes I just figured it out wow I dont know how i surpassed this size. Thank you guys for all your help

cossie1600

good job z force +1

kenchan

i usually just use my excel sheet where i put a quick formula "= cell1*cell2*.001"

walla you get the height of the tire in cm.

kenchan

btw, for a 245/40 tire, Cell1 would be your width (245) and Cell2 would be your profile (40).

ZForce

I am glad to give back to the community. I have been sponging off members for awhile and it was about time I gave back. I still have not figured out the rep thing. Thanks for the props.

And they do look good!

No thank you sir! I learned the section width from you amongst other tire info. Also props to kenchan, RCZ, christian370z and several others from our discussions on other tire threads. I learned alot from you guys

daisuke149

why dont you go with extreme contact DW instead of DWS? they have the sizes you need.

kenchan

yah, im finding that the DW's are actually pretty damn nice for street. and the sidewall appearance is kinda growing on me now. (it's round and im not a real big fan of round sidewalls).

kenchan

glad my input is constructive. been modding cars for a while now and i only speak from actual experience from the stuff i bought and tried.