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      12-10-2018, 03:37 PM   #23
Expert@ApexRaceParts
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Quote:
Originally Posted by OreoGuy View Post
I may be at risk of sounding seriously stupid, but I'm told the only stupid question is one not asked ha! So here goes...

If one weren't as interested in the traditional square setup, as simply being able to run 305 tyres all around...

Would it be possible to run 18x11" ET44 on the rears and 18x11" ET25 on the fronts (i.e. combination of option 1 and 2), where reading the description for each option lends itself to believe that no spacers or negative camber will be required for either the rears or fronts?

Thanks!
Not a stupid question at all! In fact, many non-M 1-Series owners with 1M front fenders run similar fitments (same width front and rear, but different offsets) due to the unique offset requirements.

It can certainly be done, but there will likely still be some level of negative camber required up front to fit the 18x11" ET25, especially with a 305 tire.

--Dylan
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      12-10-2018, 03:44 PM   #24
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Quote:
Originally Posted by Expert@ApexRaceParts View Post
Not a stupid question at all! In fact, many non-M 1-Series owners with 1M front fenders run similar fitments (same width front and rear, but different offsets) due to the unique offset requirements.

It can certainly be done, but there will likely still be some level of negative camber required up front to fit the 18x11" ET25, especially with a 305 tire.

--Dylan
Thanks for the quick reply Dylan! Is there any offset upfront with a 18x11" wheel that you can imagine no negative camber is required? The car will be a daily driver for the time being, so trying to find the best fit for all scenarios, although performance will always be priority.

Also, one further question, on performance, what effect on driveability will moving from the traditional square setup to this hybrid have?

Thanks again!
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      12-10-2018, 04:21 PM   #25
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That's not going to happen unfortunately. There just isn't room between the strut and the outer fender lip for an 11" wheel with no camber. The camber has the effect of moving the strut inwards so it's directly adding room at the fender well. At less than 2 degrees camber an 11" wheel and 305 tire will stick out 1/2" or more past the fender even if you had zero space between the strut and the wheel.

I tried this with my rear street wheels (19x11 ET44-20mm spacer) and it was just a no go when using a 305/30/19. A 305/30/19 on a 10.5" rim will work if you have some camber and massage the fender liners as the diameter is too big to turn fully (tried that too). A 10.5" is about as wide as you can go up front and that will require camber if you are using a 305 or 295 tire.

Everyone who is using the 11" front is doing so with Pirelli slicks. These are narrower than a lot of 295 tires, and are very short as well. That in combination with a lot of camber will allow it to work with that specific tire, or a lot of 295/30/18 tires. Unfortunately nobody makes a 305/30/18 tire. That would be perfect.
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      12-10-2018, 04:55 PM   #26
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OK, so for a dual duty guy like me, an 18x11" ET44 wheel all around, with 25mm spacer up front, and 295/35 R18 tyres is probably the best solution. I couldn't find any 305 tyres to match an 18" wheel.

Thanks for all of the feedback!
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      12-11-2018, 10:07 AM   #27
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35 series will require fender liner massaging for turning, 30 series will not. 30 series will look short though for sure.
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      12-11-2018, 10:54 AM   #28
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So I've already got a pair of 18x10 et25 and 18x11 et44. I'm considering adding a second pair of 18x10 et25's for the flexibility of running either staggered or square and just having a few spare wheels/tires with me. Has anyone run or would it make sense to run 18x10 et25 square with Pirelli DH 285/645-18 (not my PR setup but more for allowing some flexibility). My other thought is to just always bring spare tires with me which I am starting to do anyway.
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      12-11-2018, 11:11 AM   #29
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Originally Posted by blackey View Post
35 series will require fender liner massaging for turning, 30 series will not. 30 series will look short though for sure.
Thanks for the continued valuable information dude! 👍🏼
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      12-11-2018, 11:18 AM   #30
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Quote:
Originally Posted by ///Mobbin View Post
So I've already got a pair of 18x10 et25 and 18x11 et44. I'm considering adding a second pair of 18x10 et25's for the flexibility of running either staggered or square and just having a few spare wheels/tires with me. Has anyone run or would it make sense to run 18x10 et25 square with Pirelli DH 285/645-18 (not my PR setup but more for allowing some flexibility). My other thought is to just always bring spare tires with me which I am starting to do anyway.
I think it would work fine. I've run the 285 on the front of my 18x10's and they were fine. I've also seen the 305 squeezed on and it was fine as well. (This only goes for the Pirelli slicks btw)

Once I use up the A7's on my staggered set I'll prob sell them for a set of 18x10.5 square so I have two identical sets. I 'm with you on that one!
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      12-11-2018, 10:34 PM   #31
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Hi Gents, Iíve been looking at available tyres to pair with potential wheel setups. As this will be mostly a road car with occasional track duty, Iíd like to run something like super sports or 4s mostly. Perhaps one day Iíll have a dedicated track set on which I can run appropriate tyres...

Anyway, now Iím thinking of running the below wheels with Michelin pilot super sports, but I need help with offsets:

Front, wheel 18x10 ET???, tyre 275/35 R18
Rear, wheel 18x11 ET30 ???, tyre 295/35 R18

What do you guys think to the suggested rear offset at ET30, and what do you suggest for the front? Regarding front, any spacer or negative camber required, depending on suggested offset?

Thanks!!
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      12-11-2018, 10:57 PM   #32
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Front ET20
Rear ET44

If I were going to go with something dual duty I would look at 18" front / 19" rear setup so you can run one of the "extreme summer tires" Bridgestone S007A, Hankook RS-4, Yoko 08R, etc...

It's not common but you can run 305/30/19 rears and 275/285 fronts.

If its 95%+ road though the MPSS are hard to beat as road tires.
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      12-11-2018, 11:11 PM   #33
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Quote:
Originally Posted by blackey View Post
Front ET20
Rear ET44

If I were going to go with something dual duty I would look at 18" front / 19" rear setup so you can run one of the "extreme summer tires" Bridgestone S007A, Hankook RS-4, Yoko 08R, etc...

It's not common but you can run 305/30/19 rears and 275/285 fronts.

If its 95%+ road though the MPSS are hard to beat as road tires.
Hi dude, thanks for chiming in again! I guess you need the larger diameter wheels to get the larger width tyres in those extreme summer tyres? How do they still fair in the wet as well?
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      12-11-2018, 11:19 PM   #34
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I'm in southern cal, so not much rain here. Probably not the best judge of that!

On the track though the extreme summer tires are significantly faster than the MPSS.
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      12-11-2018, 11:26 PM   #35
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Iím in the UK, and up north, so polar opposite of your weather ha! Iíll have a further think on your 18/19 suggestion, over 18ís all around. Thanks for the offset suggestions too! Have a great day bud
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      02-12-2019, 02:14 PM   #36
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Quote:
Originally Posted by blackey View Post
305/35 is 26.4" tall with a 25mm offset it will rub. I don't think this is going to work. Strom, and me for that matter, are running a 305/645/18 which is EQ to a 305/30/18 tire. The extra height of the 35 series is going to kill it.

I've tried the 305/30/19 which is 26.2" tall on an 10.5" rim with 22mm offset and it rubs the fender liners. It's workable with massaging, but it definitely rubs.

Try it though and report back.
Tell me more about running 305/30-19 up front on 19x10.5. Does it only run at full lock? Does it still run after you massaged the fender liners?

Did you ever try 19x11 up front with the 305s? It would be great to be able to run 305 RE71Rs square.

Also, 295/35-18 vs 295/30 ... most people (including Apex) reference being able to fit 295/35 up front. Do you recall where you had issues when testing?
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      02-12-2019, 06:33 PM   #37
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It rubs a bit before full lock. The fender wells have a bit of an hourglass shape to them and it rubs in the middle of the liner. This can be massaged with a heat gun and some work. Once massaged the rubbing is gone. I ran then for a full day autocrossing without rubbing. It's an "extreme" fitment but does work.

19x11 doesn't work without a ton of camber (4 degrees+) I do have those to try and it just sticks out too far. The 305 Pirelli slicks everyone talks about putting up front isn't as wide as a 295 Hoosier A7 btw. I've tried just about every combination I think


There should be a post on this in this forum.
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      02-12-2019, 09:07 PM   #38
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Thanks for the reply, and for digging up the old post!
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