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View Full Version : 18x10 & 18x12 or 18x9 & 18x11?


randy
09-30-2012, 12:14 PM
ok ive been reading non stop and i still dont have the right answer.
link http://www.pro-touring.com/showthread.php?77649-icemanrd19-67-camaro/page2
link http://www.lateral-g.net/forums/showthread.php4?t=30824&page=6 camaro
dse mini tubbed
rear end 54.75" ford 9"
front dse hydroformed subframe
kore3 zo6 brake setup
Car is not painted. Can modify inner fenders or outter lip if need be
I was under the impression that i was going to run a 18x10 and 18x12 combo. 275/35/18 & 335/30/18 but im told it will rub. Well where will it rub?
Im not against running a 315/30/18 25.58" on the rear and a 275/35/18 25.44" tire on the front. this setup actually sounds nicely balanced
What should i run? what backspacing? what problems will i have? Can i get this look? something close to it?

Im looking for a semi tucked looks. like the following
http://i30.photobucket.com/albums/c302/icemanrld19/pro-touring-6-2.jpg
http://i30.photobucket.com/albums/c302/icemanrld19/prd_365.jpg
http://i30.photobucket.com/albums/c302/icemanrld19/dp5.jpg

XLexusTech
09-30-2012, 12:17 PM
Hey I am looking for the exact same Intel... like look of car II and III.. tucked and wide...

Before I order the parts I want to get advise... for me I am going DSE F and R and haven't ordered a rear yet... \\:hail: :thumbsup: :unibrow: :yes:

Ringbrothers
09-30-2012, 12:20 PM
You should have no problem running those sizes I would run a 19'' wheel in the rear if you want that tucked look it will be easier and theres a way better tire selection in 19's. Call me if you want a price were a forgeline and h.r.e dealer. Telly (608)588-7399

67zo6Camaro
09-30-2012, 12:25 PM
I know it can be tuff getting that final fit and look. But you do have one advantage over most.... your car has not been painted yet and you can adjust were needed.

Basically all combos will eventually rub depending on how low you want the ride and how hard you plan to push the suspension under load. I would just start with the combo that is "The Look" you want, then adjust the wheel wells as needed.

An 18x10 and 18x12 is a good starting point, as most tire sizes we are currently running will ask for a wider rim. Exp... 275 wants a 9.5 rim and you could push it to a 295 on a 10 wide rim. As for the back.. the 11" wide rim is good for most 305 to 325 set ups but if you have the room to run the wider stuff like a 315 to a 335 then the 12 in wide rim is more in the range of the tire manufactures spec. The manufactures base the rim width on how the tire will shape when put on that size rim. Try to stay within their specs.

So bottom line here get the bigger rim set and do some mock up without the coil-overs in. Push the suspension all the way through the motion cycle and make adjustements in the inner wheel wells as needed.

One other thing, looking at most of the big name builds (Tuckers, Finch, Penny, OLC....) they have all had some type of rubbing during extreme driving conditions. Typically they will make adjustments in the Coil-over height depending on the track conditions expected.

Just keep in mind you have the advantage of makeing the clearance now (before paint) in order to get the look and tire size you want.

Thats my 2 cents.

(edit) just my opinion, if you go to the 19" tall rim, then you add the issue of needing more wheel well clearance as you lower the car. However if you are not concerned as much with the low-ness and are going more for the tire tucking look then it's not as much as a big deal (the 19" will require more work to get low and have travel clearance under extreme driving conditions).

randy
09-30-2012, 12:35 PM
Thanks guys.
The 255mm max width on the front is disappointing. I talked to the guys at DSE, Apparently the problem is not rubbing on the subframe, but rubbing on the outer fender lip when the tire rotates around. The inner edge of the tire swings toward the outer fender as you turn the wheels. Thats how it was explained to me. I guess its a problem with the 67-68 shaped fenders. The 69s have longer openings, and more room for bigger tires.

Here is the wheel combo recommended by DSE:
18x11 rear, 5" b.s. with a 315/35/18
18x9 front, 6.125" b.s. with 255/35/18



noticed this on another thread

randy
09-30-2012, 12:49 PM
I know it can be tuff getting that final fit and look. But you do have one advantage over most.... your car has not been painted yet and you can adjust were needed.

Basically all combos will eventually rub depending on how low you want the ride and how hard you plan to push the suspension under load. I would just start with the combo that is "The Look" you want, then adjust the wheel wells as needed.

An 18x10 and 18x12 is a good starting point, as most tire sizes we are currently running will ask for a wider rim. Exp... 275 wants a 9.5 rim and you could push it to a 295 on a 10 wide rim. As for the back.. the 11" wide rim is good for most 305 to 325 set ups but if you have the room to run the wider stuff like a 315 to a 335 then the 12 in wide rim is more in the range of the tire manufactures spec. The manufactures base the rim width on how the tire will shape when put on that size rim. Try to stay within their specs.

So bottom line here get the bigger rim set and do some mock up without the coil-overs in. Push the suspension all the way through the motion cycle and make adjustements in the inner wheel wells as needed.

One other thing, looking at most of the big name builds (Tuckers, Finch, Penny, OLC....) they have all had some type of rubbing during extreme driving conditions. Typically they will make adjustments in the Coil-over height depending on the track conditions expected.

Just keep in mind you have the advantage of makeing the clearance now (before paint) in order to get the look and tire size you want.

Thats my 2 cents.

(edit) just my opinion, if you go to the 19" tall rim, then you add the issue of needing more wheel well clearance as you lower the car. However if you are not concerned as much with the low-ness and are going more for the tire tucking look then it's not as much as a big deal (the 19" will require more work to get low and have travel clearance under extreme driving conditions).

Thank you very much for taking the time to write this. I just feel that i would have more "options" with a 18" wheel. ride height, tire options, etc Lets say i put the 18s on with 335/30/18 and it rubs i can easily switch to a 315/30/18 to bring the tire in some to gain some extra clearance. Nice thing about being a store manager of NTB is that i can order whatever options i want lol

sounds like your leaning towards the 18x10 and 18x12 rim selection and try to run the 275/35/18 and 335/30/18 and if that doesnt work switch to a 315/30/18 in the rear. Now what about backspacing?

James OLC
09-30-2012, 05:20 PM
ok ive been reading non stop and i still dont have the right answer.

Im looking for a semi tucked looks. like the following
http://i30.photobucket.com/albums/c302/icemanrld19/pro-touring-6-2.jpg


Wow - been a while :)

Your best bet will be to call DSE directly and ask - they know better than anybody what will work (particularly on the front) and what won't. if you run a 275 you don't really need to run a 10" (which I think might be tight), a 9.5 should be (is) fine.

One argument in favor of 19's in the back is that it gives you a bunch better tire selection. With current Corvette's using a 275/35-18 and 325/30-19 combo you are guaranteed a good selection - plus you have the alternative of a 305/30-19 (which is the same size as a 315-18 in most cases). Some larger sizes in 18s are getting harder to find as fewer cars run them and most "new" tires favor more common "current" sizes (i.e. Michelin Pilot Super Sports).

Just my two bits. Again - I would call DSE for their input.

randy
10-04-2012, 06:04 PM
well i measured and the results were 14.5" at 12 oclock from inner fender to outer fender portion. I imagine i could cut off 1/4" atleast if needed.

if a 275/35/18 tire is really made for a 18x9.5 like the corvette im fine with that. I doubt that .5 will make any difference.

Matt@BOS
10-04-2012, 07:02 PM
My car is a '69 with everything from DSE and sits relatively low.
http://i366.photobucket.com/albums/oo103/69MSA/DSC_0761.jpg
To get it to not hit the fenders we had to modify the inner fenders for more clearance and roll the fender lips between 10 and 2 o'clock. Around town, and under hard driving there is zero rubbing, however, I do occasionally hit the tire against the frame, but just barely. This is only at full lock with 275s on a 9" rim. With the '67 and '68 I think it would be very difficult to pull of the stance you want with any normal amount of steering. The only '67-'68s I know of that are low and have 275s have very limited steering, and still occasionally rub, although aftermarket/highly modified frames, not DSE frames.

Matt

suark
10-05-2012, 05:16 PM
I went with 275 & 335 18's on 18x9 and 18x11.5 wheels, I don't have it on the road yet but it appears to have plenty of clearance. I too was torn whether to run 18's or 19's in the rear but was afraid I'd have clearance issues and I thought the 19's were a hair too big looking.

randy
10-05-2012, 08:35 PM
judging by the rear pic it looks like you still have some room on the rear. Fronts fit nice. What is your front offset running at 9" wheel? If i wanted to go 9.5 i wonder what it would be. In these pic is your rear end narrowed to 54.75?

After looking at these pic im deff doing the 18x9.5 in the front with a 275/35/18 but on the rear im still debating about 18x11.5 or 18x12. As far as the rear tires go i can just test fit a 335/30/18 and if i dont like it ill switch to a 315/30/18.


so 18x11.5 or 18x12 folks?

I went with 275 & 335 18's on 18x9 and 18x11.5 wheels, I don't have it on the road yet but it appears to have plenty of clearance. I too was torn whether to run 18's or 19's in the rear but was afraid I'd have clearance issues and I thought the 19's were a hair too big looking.
My wheels/tires showed up, I got a awesome Black Friday deal from Frank at Prodigy. Now I can start mocking up the rearend.http://i1161.photobucket.com/albums/q516/jdkraus/IMAG0035.jpg
http://i1161.photobucket.com/albums/q516/jdkraus/IMAG0056.jpg
The 335's fit pretty good

suark
10-06-2012, 07:03 AM
Front backspace is the DSE recommended 6.125, one front tire just touches the frame at full turn so that backspace is max. The rear end ended up being 53.625. After I rolled the lip there's .75 clearance inside and out, I could've went with 12 in wide wheels I guess. We'll see after I drive it.

randy
10-07-2012, 04:51 PM
need help trying to decide what to do.

question 1

18x9.5 and 18x11.5 <<< allows me to go to a 315/30/18 if needed
or
18x9.5 and 18x12 <<<< 18x9.5 is the recommended width on a 275/35/18
or
18x10 and 18x12 <<<< widest rim size. pushing limits on how low i can go

question 2

hidden hardware or not on a titanium center with polished lip?

question 3

zx3r or zx3p? why? <<< i sorta like the zx3p bc they make the rim look bigger

if you look at these two pic notice how theres more lip on the bottom pic front rim than the 1st pic. This is the only way i would want a step lip is if i have that lip right before the center part of the wheel
http://i1161.photobucket.com/albums/q516/jdkraus/IMAG0035.jpg
http://i200.photobucket.com/albums/aa251/Payback1969/Forgelines007.jpg

randy
10-07-2012, 05:21 PM
titanium center and inner, engraved color titanium centercap, hidden hardware, hoping to get alittle more lip on the front


the only thing that is left is my wheel size. 18x9.5 and 18x11.5, 18x9.5 and 18x12 or 18x10 and 18x12?????? after looking at "dust off" and "blue hour" im leaning towards 18x12 and 18x10 but if i go with 18x11.5 its a easier transistion to a 315/30/18 if i wanted too


http://i30.photobucket.com/albums/c302/icemanrld19/ga3.jpg
http://i30.photobucket.com/albums/c302/icemanrld19/RuntotheCoast32012020.jpg

suark
10-08-2012, 11:22 AM
need help trying to decide what to do.

question 1


18x9.5 and 18x11.5 <<< allows me to go to a 315/30/18 if needed
or
18x9.5 and 18x12 <<<< 18x9.5 is the recommended width on a 275/35/18
or
18x10 and 18x12 <<<< widest rim size. pushing limits on how low i can go

question 2

hidden hardware or not on a titanium center with polished lip?

question 3

zx3r or zx3p? why? <<< i sorta like the zx3p bc they make the rim look bigger

if you look at these two pic notice how theres more lip on the bottom pic front rim than the 1st pic. This is the only way i would want a step lip is if i have that lip right before the center part of the wheel
http://i1161.photobucket.com/albums/q516/jdkraus/IMAG0035.jpg
http://i200.photobucket.com/albums/aa251/Payback1969/Forgelines007.jpg

Both front wheels most likely have the same the backspace, but the top pic (mine) is 18x9 and the bottom is 18x10 thus the extra inch of lip before the center.

randy
10-08-2012, 12:37 PM
titanium center and inner, engraved color titanium centercap, hidden hardware, 18x10 and 18x12, 275/35/18 and 335/30/18 bfg kdw. brake clearance for c6 z06 brakes.


http://i30.photobucket.com/albums/c302/icemanrld19/ga3.jpg

looks like this is the winner. only difference is that i will have the polished lip and hopefully i can have the valve stem hidden like the premier series. waiting for the tire tool to show up and then i will be ordering these from matts classic bowties. Great customer service

:lateral: :cheers: :woot: :woot: :woot: :woot: :woot: :woot:

randy
10-16-2012, 05:37 PM
well i received the tire tool from syborgTT and thank god that i did. The rear 335/30/18s fit but man is it tight. Almost to tight to my likings. With the really low ride height that i want i feel that its better to stick with a 18x11 wheel in the rear and run a 315/30/18. The fronts i want to stick with the 275/35/18. its the perfect overall look for me. Now its just time to find the front offset using a 18x9.5.

randy
10-17-2012, 06:25 PM
confirmed 18x11 with a 54.75 dse quadralink should use 5" backspacing

Now 18x9 67 and 68 camaro should run 6.125. with a 18x9.5 i think my rep told me 6.375. Does that sound right?


with a 6.125 would what pull the rim in more or push it out towards the fender?

Would that really make a difference between the two?

Matt@BOS
10-17-2012, 06:49 PM
My advice, run an 18x9 with 6.125" backspace. If you want the car to sit low that will help minimize the amount of times the tire hits the control arms. You are only going to lose maybe a 1 or 2 tenths of an inch of tread width by going with a 9" wheel over a 9.5" wheel.

Matt

randy
10-17-2012, 07:36 PM
My advice, run an 18x9 with 6.125" backspace. If you want the car to sit low that will help minimize the amount of times the tire hits the control arms. You are only going to lose maybe a 1 or 2 tenths of an inch of tread width by going with a 9" wheel over a 9.5" wheel.

Matt

its more about the way i want the 275/35/18 to sit on the rim. the 8.5 rollers that i have now are a 8" wide wheel using 255. corvettes use a 275 on a 9.5" rim.

Time to find some tires. 275/30/18 and 315/30/18 sizes. i wish they made the kdw on the rear but they dont. looks like toyo, kumho and falkens are the only real options. Opinion?

67ragtp
10-18-2012, 04:36 AM
My advice, run an 18x9 with 6.125" backspace. If you want the car to sit low that will help minimize the amount of times the tire hits the control arms. You are only going to lose maybe a 1 or 2 tenths of an inch of tread width by going with a 9" wheel over a 9.5" wheel.

Matt

Im Rich, and "I approve this message", My 69 also has a DSE clip ordered my forgeline zx3p's with 6.125 offset 18x 10 275 toyo 888 not nearly as low as Matts car, turn the wheel to lock just barely touched the frame and both inner fenders around the tops. Install stainless button head screw all around the inner fender. Nightmare, back to forgeline for a rehoop, outer wheel shell 1 inch smaller making the overall 18x9 and its perfect, and I could drop the front more if I want. It doesn't really look like it sucked the wheel in to the wheel house, clearing the fender is the biggest problem.
Rich

randy
10-18-2012, 04:15 PM
Im Rich, and "I approve this message", My 69 also has a DSE clip ordered my forgeline zx3p's with 6.125 offset 18x 10 275 toyo 888 not nearly as low as Matts car, turn the wheel to lock just barely touched the frame and both inner fenders around the tops. Install stainless button head screw all around the inner fender. Nightmare, back to forgeline for a rehoop, outer wheel shell 1 inch smaller making the overall 18x9 and its perfect, and I could drop the front more if I want. It doesn't really look like it sucked the wheel in to the wheel house, clearing the fender is the biggest problem.
Rich

what is your front tire size?

67ragtp
10-19-2012, 04:19 AM
front tire 275 35 18