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-   -   Conti DSW HELP!!! (http://www.the370z.com/wheels-tires/35137-conti-dsw-help.html)

Z Monster 04-21-2011 12:13 AM

Conti DSW HELP!!!
 
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 04-21-2011 12:55 AM

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.

azn370z 04-21-2011 01:03 AM

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

ZForce 04-21-2011 01:33 AM

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 :tiphat:

Z Monster 04-21-2011 06:31 AM

Quote:

Originally Posted by christian370z (Post 1065640)
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.

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 04-21-2011 06:37 AM

Quote:

Originally Posted by ZForce (Post 1065666)
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 :tiphat:

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 04-21-2011 09:21 AM

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...

Z Monster 04-21-2011 09:33 AM

Quote:

Originally Posted by tsolin01 (Post 1065885)
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...

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

cossie1600 04-21-2011 10:00 AM

good job z force +1

kenchan 04-21-2011 11:41 AM

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. :p

kenchan 04-21-2011 11:43 AM

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

ZForce 04-21-2011 10:41 PM

Quote:

Originally Posted by Z Monster (Post 1065753)
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

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.

Quote:

Originally Posted by tsolin01 (Post 1065885)
I have these in 245/40/19 and 285/35/19 on the same rim widths as Nismo rims...

And they do look good!

Quote:

Originally Posted by cossie1600 (Post 1065929)
good job z force +1

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 :tiphat:

daisuke149 04-21-2011 10:56 PM

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

kenchan 04-21-2011 11:33 PM

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

kenchan 04-21-2011 11:41 PM

Quote:

Originally Posted by ZForce (Post 1067354)
Also props to kenchan, RCZ, christian370z and several others from our discussions on other tire threads. I learned alot from you guys :tiphat:

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. :tup:


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