Appropriate Wheel Offset for 18" Wheels?

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72BBSwinger said:
Im not busting your balls here intentionally lol! Your mock up tire/wheel was a 275 tire yes, but on a 17x8. So your section measurements will not be over 10 wide I would bet. To end this debate here is what I would do: buy a pair of the fronts and mount the tires you want to run, then see what is needed in the rear with those. Prove me wrong!
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This isn't fair. I want you to prove me wrong first. :violent1: :banghead:

Yeah, you're right... Section width was just a hair lengths wider than 10" so no 9.5" wide wheel. I was too into the numbers... So now my options are a 245/40/18 or a 255/35/18. Lame... :/

So the closest wheels to fitting straight off the market are going to be the Drag Wheels, again. At least their cheap.
http://www.summitracing.com/search/brand/drag-wheels/product-line/drag-wheels-dr-31-flat-black-wheels-with-red-stripe/wheel-bolt-pattern/5-x-4-1-2-in/wheel-diameter/18-in/wheel-width-in/9-000-in/primary-wheel-color/black?N=401891%2B349159%2B4294947558%2B4294920350%2B4294920748%2B4294920824&autoview=SKU

There's also the Enkei RP03 that comes in a +18mm and a +40mm (have to get the fronts together to make sure it fits) that may work. I'd just have to get it from a different vendor as Summit doesn't hold the +40mm offset.

http://www.enkei.com/rp03.shtml#
[ame]http://www.enkei.com/size_chart/RP03.pdf[/ame]
 
72BBSwinger said:
Dont get to discouraged, here is a Dart running 18x9 Enkei's with 275/35/18's all the way around. It can be done, it has been done. Just dont freak about a little bit of spacer in the rear. No big deal, I have to run a 3/8 spacer in the front, and guess what, it is fine as frog hair. http://www.protouringmopar.com/attachment.php?attachmentid=3795&d=1395715152
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I don't see the photo... For now, I'd rather not have to modify anything or add spacers if I don't need to.
 
Ok ok you made me do it
 

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And another
 

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Wow, I've never seen that Dart before. It looks awfully pretty. I need to join that other forum asap.
 
A quick photo from this weekends Autocross sporting 285/35/18 on 18x10 wheels front and rear...
 

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tomswheels said:
A quick photo from this weekends Autocross sporting 285/35/18 on 18x10 wheels front and rear...
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NICE!!! :thumpbup:

So we know you did some bodywork on the rear quarters to make those fit, did you do anything to the front?

I have 275/35/18's on my Duster, but they're on 18x9's. I haven't had any issues on the fenders yet, but I still just touch the frame at full lock. But I also think the steering stops on my lower ball joints are smaller than some...
 
72bluNblu said:
NICE!!! :thumpbup:

So we know you did some bodywork on the rear quarters to make those fit, did you do anything to the front?

I have 275/35/18's on my Duster, but they're on 18x9's. I haven't had any issues on the fenders yet, but I still just touch the frame at full lock. But I also think the steering stops on my lower ball joints are smaller than some...
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No problems with the frame clearance running the Hotchkis TVS. Very minor front fender massaging, mostly at the rear of the front wheel opening. What is the offset on your 18x9s?
 

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tomswheels said:
No problems with the frame clearance running the Hotchkis TVS. Very minor front fender massaging, mostly at the rear of the front wheel opening. What is the offset on your 18x9s?
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Good to know!

My 18x9's have a 35mm offset, but I run 13" Dr Diff rotors and 3mm spacers, so my effective offset compared to stock 73+ rotors is 27mm now. I haven't done anything to the fenders and haven't had any problems, but I still just lightly rub the frame in the back at full lock. Just enough to rub the paint off now. I also had to cut down the corner of my Z-bar brace. Based on what I've seen for steering stops on some other ball joints I think my lower ball joints allow a little more steering than others.
 
72bluNblu said:
Good to know!

My 18x9's have a 35mm offset, but I run 13" Dr Diff rotors and 3mm spacers, so my effective offset compared to stock 73+ rotors is 27mm now. I haven't done anything to the fenders and haven't had any problems, but I still just lightly rub the frame in the back at full lock. Just enough to rub the paint off now. I also had to cut down the corner of my Z-bar brace. Based on what I've seen for steering stops on some other ball joints I think my lower ball joints allow a little more steering than others.
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Can you run just a bit more spacer so that it keeps it off the frame, and still have fender clearance?
 
tomswheels said:
Can you run just a bit more spacer so that it keeps it off the frame, and still have fender clearance?
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Yeah that's the plan, although I'm about to change fenders so I haven't pulled the trigger on the new spacers yet. 5 or 6mm would probably be plenty, it really is a minor rub.
 
Don't forget camber angle being a factor. Tom said hes runnin 2.75 NEG IIRC. I bet that equates to about 3/4" at the top of the tire give or take. Seems 18x9.5's are pretty common in the 38-45mm bs range and I think I may end up with a set of those and the same tires Tom is running. Was also considering 19x11's and 305/30/19's but I need to get the damn car back on the road before that happens.
 
72BBSwinger said:
Don't forget camber angle being a factor. Tom said hes runnin 2.75 NEG IIRC. I bet that equates to about 3/4" at the top of the tire give or take. Seems 18x9.5's are pretty common in the 38-45mm bs range and I think I may end up with a set of those and the same tires Tom is running. Was also considering 19x11's and 305/30/19's but I need to get the damn car back on the road before that happens.
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Very true! In this pic you can see the camber at work. You will love the R-S3!

 
tomswheels said:
Very true! In this pic you can see the camber at work. You will love the R-S3!

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Im sure I would Tom! They are an affordable tire in 200aa and that size is "doable" on about any A-body. Uchoog runs 285's and 18x9.5 on his Duster as well.
 
So I have actually have something worthwhile to add... I saw these over at GRM and for the price they may seem like a great deal! Not ideal for me but it gets me in the 18" crowd.
http://www.americanmuscle.com/charcoal-amr-18x9-0512.html
The only problem is that they are 30 mm offset I am looking for about 40 (I have a similar setup to 72NewBlue) FMJ spindle, eventually dr diff 13 disks, early RMS tubular control arms, strut rods, firm feel tie rods.

I also have a Diplomat rear 8.25 (this is a fantastic rear for my goals) with Grand Cherokee disks. Do you think these wheels will be "close enough" with some spacers. I plan an a 275/40 square set-up?
 
And they are gone! I should have purchased them when I posted this... oh well it looks like Enkeis' for me...
 
So, I think I'm going to purchase the Enkei RP03's in 18x9, +40mm offset for the fronts and +18mm offset for the rears with a Michelin Super Sport 255/40/18 all around. It's going to be tight with no reworking, but I think it will fit. If not, I'll just buy some very thin spacers and then call it a day.
 
MuuMuu101 said:
So, I think I'm going to purchase the Enkei RP03's in 18x9, +40mm offset for the fronts and +18mm offset for the rears with a Michelin Super Sport 255/40/18 all around. It's going to be tight with no reworking, but I think it will fit. If not, I'll just buy some very thin spacers and then call it a day.
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I still think you're going to need spacers up front with a +40 offset, even with the Dr. Diff 13" rotors.

I know that compared to my set up, with 275/35/18's on 18x9's with 35mm offset, Dr. Diff 13" rotors and a 3mm spacer, the 255's and 40mm offset show as being .1" further off the suspension, but that's not the only thing to consider. The 255/40/18's are over .25" taller than my 275's, and that will come into play. My tires still touch the frame at full lock, and tire height plays a bigger factor there than offset. Granted, my wheels just barely touch, but I think with a taller 255/40/18 you'll end up with interference at full lock. My guess would be that you'll need at least a 5mm spacer to make them clear in the front.

Not that a 5mm spacer is a deal breaker, but it might be necessary. Heck, I need to go to a 5 or 6mm spacer to finally get mine completely clear if I can manage the room to the outside.
 
I ordered 4 of the AMR charcoal wheels for my dart project. I haven't done a test mount yet but hopefully will this weekend. I don't ahve tires for them yet but hope to run the 275/35/18 like BBSwinger but i will have these on all 4 corners. I will be running (eventually) a 8.8 explorer rear with the drivers side cut down some. I will mini-tub the rear (for future tires fitment). The wheels don't have quite the offset I was hoping for but for the money you can't beat them.
 
72bluNblu said:
I still think you're going to need spacers up front with a +40 offset, even with the Dr. Diff 13" rotors.

I know that compared to my set up, with 275/35/18's on 18x9's with 35mm offset, Dr. Diff 13" rotors and a 3mm spacer, the 255's and 40mm offset show as being .1" further off the suspension, but that's not the only thing to consider. The 255/40/18's are over .25" taller than my 275's, and that will come into play. My tires still touch the frame at full lock, and tire height plays a bigger factor there than offset. Granted, my wheels just barely touch, but I think with a taller 255/40/18 you'll end up with interference at full lock. My guess would be that you'll need at least a 5mm spacer to make them clear in the front.

Not that a 5mm spacer is a deal breaker, but it might be necessary. Heck, I need to go to a 5 or 6mm spacer to finally get mine completely clear if I can manage the room to the outside.
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Yeah, I've kind of figured it may come to that. If I need a spacer, I really don't want anything more than 1/4". My other option besides the 255's would be the 245/40's which will bring the tires in a bit and will be just as tall as a 275/35. And the wheel only comes in those two offsets.
 
I just placed my order on wheels. I'm wondering if I should order 245/40/18's and start by there or just stick with the 255/40/18's and fiddle around. Remeasuring, I think I'm going to need some small spacers but as long as I have good thread engagement, I think I should be fine. I can't afford to have the wheel hit the frame rails due to brake lines.
 
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