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Stuffing rubber in the back...

Hey everyone,

Can I get away with 335/30-18's in the rear on 18x12s without any fender mods?

Old 07-26-2011, 02:49 PM
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specifically these ==> 335/30/18 BFG T/A KDW 2's

Old 07-26-2011, 04:14 PM
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I haven't tried putting 335's under my car but I have 315/35-17 BFG's and I can't see fitting anything wider under there. I had to grind off some of a suspension bolt on the left side to keep it from rubbing on the inside and the outside is about a 1/4" from the edge of the fender. That's with an 11.5 wheel.
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Old 07-26-2011, 04:59 PM
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I have 335's under mine. Had to shave the inside lip of the fenders and 'tweek' my spacers a bit...

They leave about 1/4" from the spring plate bolts...
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Old 07-26-2011, 05:02 PM
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Holy crap...
OK, just trying to make this easy on myself.
Ordering a set of CCW Calssics in 18x9 FR and 18x12 rear with 255/35 and ??? rear.
Tire Rack has the KDW2's on sale / special and the don't have 1 315/30 size...
I sent John @ CCW an email - I'll post up what he says in the morning.
I definetly don't want to monkey around with anything - just bolt on and go.
I have 295s on 996TT wheels which are 11s and seems like to me I have a good 1.5" or so on the outside and another .75" on the inside of room before things get real close.
Old 07-26-2011, 05:18 PM
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345's

Oops... I have 345's... It's an older picture [have since changed the exhaust to gt3 center exhaust]...

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Old 07-26-2011, 05:28 PM
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You could do a search of '335' on the turbo forum to get some input but it seems like a real hassle to fit that wide under there.

I bet a 315/30-18 tire would fit a 12" wheel just fine even though it's not rated for it if you decide to stay with 12" wheels.
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Old 07-26-2011, 05:37 PM
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345/35-15 yes, 335/30-18 no.
The reason is not width but height. The 345/35-15 is only 24.5" tall while the 335/30-18 is 26" tall. I've got a set of 315/35-17 TDK's on 11.5" Kodiaks and they barely fit due to the height issue. My bolts are shaved, fender lips cut off, and oil lines re-routed. The set of Michelin sport 335/30-18's I have sitting on the shelf have a full 14" sidewall width and must use a minimum of 12" wheel. Nomatter how I tried they just won't fit, unless you don't mind scraping at every bump.
I also have a set of 315/30-18's on 12x18 wheels which fit great and look great. My 345/35-15's have been retired due to NLA Yokohama tires. The Yokos were a full 3/4" wider than the Pirelli's that Mooney is running. It is good to note that each brand is a different actual size so some wiggle room exists.
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Old 07-26-2011, 05:39 PM
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Thanks everyone - I'll report back in the AM.
Old 07-26-2011, 05:52 PM
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wow 345's that wide.
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Old 07-26-2011, 05:55 PM
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Brian, you're right on the height issue... Taller would not be good...
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Old 07-26-2011, 05:59 PM
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What do you guys think of jamming a 265/35/18 in the front on 18s and then running 315/30/18 in the rear - Kumho Ecsta XS - apparently they don't offer a 255/35/18 which is what I was originally looking for and kicked off my whole 335/30/18 thought process. I'm trying to save $$$ on the tires and I want to stay with the same tire front and rear.
Old 07-26-2011, 06:39 PM
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I run the XS's (you're pronouncing it wrong btw, it's CUM-HO)... really like them. Rears are now slicks after 1 DE and maybe 7k-ish miles. Fronts wearing surprisingly well considering the cornering I do.

I won't opine about the size tho, other than I run 265/18s @ all 4 corners of Alumib!tch 8-)... SumiIII's tho...

Good luck - awesome score on the CCW's... I was about to heb!tch manslap you for running twists on such a fine build 8-)...
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Old 07-27-2011, 05:39 AM
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When you get close to max dimensions fitment will depend on the tire brand.
By the numbers a 265/35-18 will be 0.4" wider and 0.3" taller than a 255/35-18 (which is the size I run with the 315/30-18 rears). This doesn't sound like much but 1/3" is huge when you are at the limit of fitment. Suspension settings become critical.
You really need to allow some wiggle room for potholes and lock-to-lock steering. The 255/30-18 315/30-18 combo I use are Pirelli P-Zero's; Pirelli's run small so they fit well with no issues of rubbing using street suspension settings. The 255/40-17 315/35-17 TDK's I run do not fit perfectly and rub on occasion. This is because the manufacturer (BFG) runs on the large side and these 315 tires are 3/4" wider than the 315 Pirelli's.
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Old 07-27-2011, 05:41 AM
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Well sadly never heard back from John @ CCW - assuming he is busy.
I"ll call him tomorrow morning and hear what he has to say.
Thanks everyone regarding the input on the tires - looks like the 335/30s are too large to fit back there - so now I'm hoping the Kumho's run a bit smaller only in their 265/35 fitment.

Last edited by E-man930; 07-27-2011 at 03:37 PM..
Old 07-27-2011, 02:20 PM
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You should be OK with 265's in the front. There are some guys running 275/40-17 in the front which are wider and taller. You may have some rubbing at full lock but you should only hit the locks in a parking lot.

When you're checking your offsets, check on both sides especially if your car is pre '86 since the fenders may be off a little side to side.
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Old 07-27-2011, 03:25 PM
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...I just re-read the name of your post...

um, er, uhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...
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| '07 S6 | '98 M3 vert | '01 M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 S8 | '95 S6 6gang | '88 M5 | '87 190E 2.3-16 |
Old 07-27-2011, 05:29 PM
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LOL, Paulie!!!
Old 07-27-2011, 06:28 PM
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Jeez Paul only you "wood" point that out!
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 07-27-2011, 07:51 PM
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Exactly... nice Paul...
What kind of sly remark are you going to make now that I may be trying to stuff rubber in the front and rear?




Last edited by E-man930; 07-28-2011 at 05:17 AM..
Old 07-28-2011, 05:11 AM
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