20x10 Front 20x11 Rear Offset fitment advice needed!

Forum for Infiniti M37, M56 M35h Hybrid and Q70 owners.
brandish
Posts: 4
Joined: Thu Jun 28, 2018 12:01 pm
Car: INIFINITI M37X

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Current setup: M37x on stock 18's and suspension. I want to keep the stock suspension. I've been trying to order some Savini BM15 http://saviniwheels.com/black-di-forza/bm15/ 20x10 for the front and 20x11 for the rears, for a flush with the fender look. The guys at Savini are saying it will poke out too far. I want to take their word but when I see that Altered is running this same setup on his rohanas with 25 and 28 offset, I wonder if they are just trying to be safe. I really want the concaveness to show and they are trying to push 8.5 width in the front and 10 in the back. That's just not acceptable in my mind right now. I need any advice I can get.


DriftMissle
Posts: 10
Joined: Sun May 06, 2018 2:16 pm
Car: 2011 Infiniti M37

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There's certainly going to be poke. I believe with the 18x8 you'll have about an inch to extend to be flushed.

There is a thread on wheel spacers where CRV_33 had the sport 20x9 +43 with a 25mm (1in) spacer and it poked. That much poke looks pretty good IMO.

Assuming a wheel that is 10" wide with a +43 offset, it'll already be an inch further compared to the 18x8.

brandish
Posts: 4
Joined: Thu Jun 28, 2018 12:01 pm
Car: INIFINITI M37X

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Thanks for the reply. I was on willtheyfit.com doing some calculations. The OEM 20's stick out 12.7 mm(.5 inches) further than the 18's. To acheive the same flush look as OEM 20x9s with 20mm spacer on the OEM 18x8s I can add 12.7mm to 20mm (spacer size to fender flush OEM 20's) to get +32.7mm . Adding 2 inches width with the 20x10's adds 25.4mm more poke from stock 18's. Moving the stock offset from +43 to +36 gives me +7mm more poke to add to the 25.4mm and I get 32.4mm. Thats close enough to 32.7mm that is supposed to make it flush on the fronts. For the rears going 20x11 +43 adds +38.1mm more than stock 18's. Thats about 5mm more than the 20x10 fronts so I assume that is safe to say it will work on the rears with the extra clearance back there. If anyone can confirm my math is right and these measurements work that would be great. I need some confidence on it.

DriftMissle
Posts: 10
Joined: Sun May 06, 2018 2:16 pm
Car: 2011 Infiniti M37

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Sounds like you might actually get the front to sit flush. But the rears will be about a 1.5" extended, which I think will poke. Not 100% sure though.

I'd recommend measuring the extra extension you're expecting with the current wheels. Could hold a straight edge against fender and a measuring tape/ruler from wheel.

Bear in mind the tire sizes too.

Kareem
Posts: 16
Joined: Fri Feb 19, 2016 11:30 am
Car: 2011 Infiniti M56 Moonlight White
Borla exhaust w/ x-pipe
Sporza Graphite wheels 10" Front 43et/Rear 37et on Pirelli PZero's

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Did you ever buy the front 20x10’ and rear 20x11? What was your final offset?

MY2J
Posts: 112
Joined: Thu Jun 02, 2016 10:03 am
Car: 2011 Infiniti M37
Location: Miami, FL

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I am running those numbers... 20x10 +25 (F) and 20x11 +28 (R)
They give absolutely no issues at all on RWD. I believe AWD owners need to run a square set-up so I would advice to steer away from running staggered on your "X".

Kareem
Posts: 16
Joined: Fri Feb 19, 2016 11:30 am
Car: 2011 Infiniti M56 Moonlight White
Borla exhaust w/ x-pipe
Sporza Graphite wheels 10" Front 43et/Rear 37et on Pirelli PZero's

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Great! Thanks for getting back to me.. it's been a hassle dealing with customer reps regarding width and offsets. They err on the side of caution, even when I reference real dimensions and examples. Love this forum! I don't post much, but i'm on this site at least twice a week trying to find fixes and mods for my ride.

MY2J
Posts: 112
Joined: Thu Jun 02, 2016 10:03 am
Car: 2011 Infiniti M37
Location: Miami, FL

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I will add that you need a drop for those numbers to work. Lowering the vehicle provides just enough camber for the rear wheels to tuck within the fenders. I am running 285/35/20's out back.

Kareem
Posts: 16
Joined: Fri Feb 19, 2016 11:30 am
Car: 2011 Infiniti M56 Moonlight White
Borla exhaust w/ x-pipe
Sporza Graphite wheels 10" Front 43et/Rear 37et on Pirelli PZero's

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MY2J - so you’re running 245’s on the front 20x10’s. Was that by design to tuck the wheels? Would a 265 have worked too?

MY2J
Posts: 112
Joined: Thu Jun 02, 2016 10:03 am
Car: 2011 Infiniti M37
Location: Miami, FL

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I wanted to run 40 series up front so I went with 245's... but yes, did semi stretch to tuck

Image

Kareem
Posts: 16
Joined: Fri Feb 19, 2016 11:30 am
Car: 2011 Infiniti M56 Moonlight White
Borla exhaust w/ x-pipe
Sporza Graphite wheels 10" Front 43et/Rear 37et on Pirelli PZero's

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well done! I just realized your car was the basis for going with the 20x10's. The rims I chose are the V5's from Sporza, in Graphite on 255/40's. i ordered them on Friday last week and they have been in communication with me discussing offset and brake clearance. its very reassuring that they want to ensure aggressive look with the right fitment. KB

brandish
Posts: 4
Joined: Thu Jun 28, 2018 12:01 pm
Car: INIFINITI M37X

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I ended up ordering the Vossen CVT Silver Metallic finish 20's to put on my 13' M37x.
https://vossenwheels.com/wheel/cvt/
Front 20x9 +32 255/40
Rear 20x10.5 +45 285/35
From what I'm gathering on this forum, I can fit this no problem.
I went more conservative on the offset. I think the fronts are pushed out almost 12mm and the rear like 17mm. I just want it to sit damn near flush from the fender.
I can also run this staggered on the AWD because the front and back package are within 1% diameter. Next to nil speedometer change
The car is stock height. I will consider a moderate drop later but the roads here in the DFW area are total garbage. They will be in next Wednesday and I will try to have some pics the following week.

nswaneM70s
Posts: 14
Joined: Sat Jun 16, 2018 7:38 am
Car: 2013 M37s
Location: Pasadena, CA

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MY2J wrote:
Tue Sep 25, 2018 5:50 am
I will add that you need a drop for those numbers to work. Lowering the vehicle provides just enough camber for the rear wheels to tuck within the fenders. I am running 285/35/20's out back.
Is there a reason why you didn't go with a 255/40 tire in the front? Were you concerned about rubbing? Did you ever consider a 275/35 for the rear?

MY2J
Posts: 112
Joined: Thu Jun 02, 2016 10:03 am
Car: 2011 Infiniti M37
Location: Miami, FL

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nswaneM70s wrote:
Sat Oct 12, 2019 7:30 pm
MY2J wrote:
Tue Sep 25, 2018 5:50 am
I will add that you need a drop for those numbers to work. Lowering the vehicle provides just enough camber for the rear wheels to tuck within the fenders. I am running 285/35/20's out back.
Is there a reason why you didn't go with a 255/40 tire in the front? Were you concerned about rubbing? Did you ever consider a 275/35 for the rear?
I wanted to do full U-turns with no issues... a 255 will rub on full lock for sure. As for the rears, I was considering 295's... I like mo rubber :naughty:

sorry for the late reply... I haven't been doing much with this car lately (bored of it)

nswaneM70s
Posts: 14
Joined: Sat Jun 16, 2018 7:38 am
Car: 2013 M37s
Location: Pasadena, CA

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No problem with the reply. I'm just glad you did. I'm vacillating between the 245/40 & 255/40. I going to drop the car with Eibach springs so it won't be dramatic. The 255/40 is only 8mm wider and 4mm taller. It would minimize the stretched look and would it really make that much of a difference in full lock? I would save money using my existing 245/40 tires, but Bridgestone doesn't make a Potenza RE97 A/S in 285/35. The Lionhart has the closets tread pattern to the Potenza RE97 A/S so when the fronts wear down, I could try the 255/40 Lionharts and see how they do.

MY2J
Posts: 112
Joined: Thu Jun 02, 2016 10:03 am
Car: 2011 Infiniti M37
Location: Miami, FL

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nswaneM70s wrote:
Tue Oct 15, 2019 10:40 am
No problem with the reply. I'm just glad you did. I'm vacillating between the 245/40 & 255/40. I going to drop the car with Eibach springs so it won't be dramatic. The 255/40 is only 8mm wider and 4mm taller. It would minimize the stretched look and would it really make that much of a difference in full lock? I would save money using my existing 245/40 tires, but Bridgestone doesn't make a Potenza RE97 A/S in 285/35. The Lionhart has the closets tread pattern to the Potenza RE97 A/S so when the fronts wear down, I could try the 255/40 Lionharts and see how they do.
Try the 255's... at the end of the day, it's your car and your taste. I will say this tho, and I say this because I'm pretty low on my BC's... I commute a lot and spending money on big name brand tires once a year is not something I myself would want to do. I'm getting around 20K out of my tires with the camber wear

nswaneM70s
Posts: 14
Joined: Sat Jun 16, 2018 7:38 am
Car: 2013 M37s
Location: Pasadena, CA

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Thanks. Try to get a firm price on the Lionharts. I gotta find someone local will in install the springs. As soon as I tell places that the back seat needs to be pulled out, they're saying they can't do it.

MY2J
Posts: 112
Joined: Thu Jun 02, 2016 10:03 am
Car: 2011 Infiniti M37
Location: Miami, FL

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Remove the rear seats yourself and show up with them already out. Takes all of 5 minutes to do. There really isn't much to dropping out the suspension.

nswaneM70s
Posts: 14
Joined: Sat Jun 16, 2018 7:38 am
Car: 2013 M37s
Location: Pasadena, CA

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If I was younger, had the proper tools to do the work and a lot more free time, I would attempt pulling the seat myself. I'd rather someone with the proper tools do the work and be able to blame someone else if something were to go wrong. I have too many other things that I blame myself for and I don't need to add one more.


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