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 Old 10-24-2011, 10:10 PM   #1
 
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Default 18x8 +42mm, 235/40/18 Fitment (added PICS)

Hi All,

Ive searched this whole section on Wheel and Tires and couldn’t find any definite answer.

I ordered rims 18x8 +42mm and looking to get 235/40/18 and not sure if I will have trouble with rubbing.

Reading what other setups ppl have on here, it seems I will be quite safe.

I read some guy with Konig Deceptions 18x8 40mm with 225/40/18 had no issues before and after lowering but haven’t found anyone with same specs as mine

Any feedback or advice will be much appreciated!

UPDATE : PICS BELOW.






Last edited by sabrelli; 12-11-2011 at 02:39 AM.
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 Old 10-24-2011, 10:11 PM   #2
 
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youll be fine. no rubbing

im running 235s on a genwon, lowered on coils, and i only rub a bit when i have a fully loaded car and i smash the gas. Genpoos have more clearance than genwons

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 Old 11-01-2011, 01:53 PM   #3
 
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i'm not lowered but i threw on some all seasons on my stockers 235/40/18 swince the dunlops r on 18x8 konigs, but no rubbing issue with the 235 on stock 7.5 wide wheels
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 Old 11-01-2011, 02:34 PM   #4
 
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yep, you should be fine
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 Old 11-01-2011, 02:51 PM   #5
 
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I would still roll ur Fenders. I would go with a 245/35 and do the roll/pull on ur fenders and Ull be great

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 Old 11-02-2011, 07:49 AM   #6
 
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Its all good..
Fitment is fine esp since im not lowered yet. Should be ok with full load too.

When i do lower, i will prolly roll guards..rather not take the risk and wreck the tires.
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 Old 11-02-2011, 07:50 AM   #7
 
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in for pics
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 Old 12-01-2011, 08:07 AM   #8
 
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pics please
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 Old 12-01-2011, 08:17 AM   #9
 
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Originally Posted by sabrelli View Post
Its all good..
Fitment is fine esp since im not lowered yet. Should be ok with full load too.

When i do lower, i will prolly roll guards..rather not take the risk and wreck the tires.
yea i have mediocre all seasons on my stock wheels 235/40/18, just lowered on eihbachs and no issues whatsoever. i have the dun lops on my konigs. looking to replace the dun lops with a good pair of summer 235/40/18s also. but lowered on 235 is no issue for me
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 Old 12-01-2011, 09:16 AM   #10
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You need 245/35 18's.
No rolling required.
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 Old 12-01-2011, 12:58 PM   #11
 
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yea^^^^ wat he said
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Suspenion/Bracing: Sonic tuning CO's revalved by Feal Suspension, QA1 600lb rear springs, 750lb front Swift springs,AWR front and rear sway bar endlinks,Whiteline RSB,SPC front adjustable ball joints,GT spec ladder brace,SU rear interior brace,NRG harness bar.
Drivetrain:SS brake lines,SS clutch line,Carbotech ax6 F&R, Southbend STG 3 endurance clutch and flywheel,SU rear diff mount,SU front rear diff mount,SP63 TC caps,DSS rear axles,AWR Trilogy mounts 70A,Hubcentric centering rings,2" brake ducting F&R,TWM STS stg 1 with bushing kit
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 Old 12-04-2011, 05:26 PM   #12
 
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Originally Posted by Tokay444 View Post
You need 245/35 18's.
No rolling required.
Im trying to figure this out..but would this size be the exact same rolling size (diameter) as the stock 225/40/18 that come stock on the car? is the 235/40/18 actually wider but also the diameter is larger, and it will throw the speedo off a bit.
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 Old 12-04-2011, 05:33 PM   #13
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245/35/18 is as close to the stock diametre as you're gonna get.
235 is wider than stock, narrower the 245, and doesn't have a sidewall comibination that as closely matches stock as the 245/35.
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 Old 12-06-2011, 08:53 PM   #14
 
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Originally Posted by Tokay444 View Post
245/35/18 is as close to the stock diametre as you're gonna get.
235 is wider than stock, narrower the 245, and doesn't have a sidewall comibination that as closely matches stock as the 245/35.
I went on like tire 1010 site or something and plugged in some sizes to the calculator....the 235/35/18 is actually a bit smaller than stock....i actually like what i saw with the 235/40/18...

what would be your guess in mpg loss with this size..it is not much bigger than stock 225/40/18 at all....

any mpg loss maybe 1 mpg if that?? curious
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 Old 12-07-2011, 03:55 AM   #15
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You should gain mpg as the tire is rotating less per mile.
But you'll never notice.
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 Old 12-07-2011, 07:26 PM   #16
 
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Originally Posted by Tokay444 View Post
You should gain mpg as the tire is rotating less per mile.
But you'll never notice.
No..the 235/40/18 is a bit taller than the stock..so i wont be rotating less..but more??? Still, the MPG loss should not be that noticeable??
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 Old 12-08-2011, 03:53 AM   #17
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I'm not sure what you just said, but a taller tire will rotate less per mile, and yield better economy.
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 Old 12-08-2011, 07:15 PM   #18
 
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Originally Posted by Tokay444 View Post
I'm not sure what you just said, but a taller tire will rotate less per mile, and yield better economy.
Noway, I just came from a few years of driving lifted trucks (Toyot tacomas, had 3 of them). Everytime I would lift and plus size the tires I would loose mpg a by a few...the smaller one would go in tire size, the better the mpg! me thinks anyway
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 Old 12-08-2011, 11:05 PM   #19
 
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Lol. The taller/wider tire is going to be bigger and heavier. More contact to the ground adding more rolling resistance as well as rotational mass means the engine has to work harder. Also your speedo and odometer may be off as well with a taller tire-hence lower MPG as you also saw in your plus sizing in the truck. It'll be minimum in the Mazda going from a 225-235
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 Old 12-09-2011, 03:58 AM   #20
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The loss in mpg comes from accelerating the heavier wheel/tire combo.
But a larger rolling diametre means less revolutions per mile.
So at a given cruising speed, you're saving gas with a taller tire.
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 Old 12-09-2011, 05:16 AM   #21
 
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Where are the pics of this setup?
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 Old 12-09-2011, 05:43 PM   #22
 
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Pics of setup in First post.
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Last edited by sabrelli; 12-11-2011 at 02:39 AM.
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