Official~Best offsets for running FAT tires!
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Understand the wait. My HREs tool 8wks and Forgelines 6.
I posted a couple pages back my final results/impressions. Currently I'm running a 245/35-19x9.5 +40 with a 5mm spacer netting a +35 on the front. First the +40 on the 9.5 was just too sunk in for me. I went with the +40 because not a lot of info was available for the sedan on Swift springs running fat tires. A 255/35 will be replacing the 245 when the time comes. Again went conservative on tire sizing for same reason.
On the rear I'm running a 285/30-19x10.5 +45. To be honest this is perfect IMO. However I want a fatter tire so a 295/30 will be mounted when the time comes.
I posted a couple pages back my final results/impressions. Currently I'm running a 245/35-19x9.5 +40 with a 5mm spacer netting a +35 on the front. First the +40 on the 9.5 was just too sunk in for me. I went with the +40 because not a lot of info was available for the sedan on Swift springs running fat tires. A 255/35 will be replacing the 245 when the time comes. Again went conservative on tire sizing for same reason.
On the rear I'm running a 285/30-19x10.5 +45. To be honest this is perfect IMO. However I want a fatter tire so a 295/30 will be mounted when the time comes.
I emailed my specs off to the shop i'm working with. I got a reply just now and this is what he said.
"You would want to do a +40mm offset at most, a +45mm offset would not be right at all.
The rolling diameter will be the same as the front with this tire size, for optimal fitment this is your best option."
and posted the following specs:
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; R-Disk; 19x9 +32mm Offset
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; O-Disk; 19x10.5 +40mm Offset
Michelin Pilot Super Sport 245/40-19 26.7 Rolling Diameter
Michelin Pilot Super Sport 275/35-19 26.6 Rolling Diameter
whats he talking about ? wondering if hes gotten confused with all the specs we been talking about.
"You would want to do a +40mm offset at most, a +45mm offset would not be right at all.
The rolling diameter will be the same as the front with this tire size, for optimal fitment this is your best option."
and posted the following specs:
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; R-Disk; 19x9 +32mm Offset
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; O-Disk; 19x10.5 +40mm Offset
Michelin Pilot Super Sport 245/40-19 26.7 Rolling Diameter
Michelin Pilot Super Sport 275/35-19 26.6 Rolling Diameter
whats he talking about ? wondering if hes gotten confused with all the specs we been talking about.
Last edited by mezzo; Sep 9, 2013 at 11:21 PM.
I emailed my specs off to the shop i'm working with. I got a reply just now and this is what he said.
"You would want to do a +40mm offset at most, a +45mm offset would not be right at all.
The rolling diameter will be the same as the front with this tire size, for optimal fitment this is your best option."
and posted the following specs:
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; R-Disk; 19x9 +32mm Offset
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; O-Disk; 19x10.5 +40mm Offset
Michelin Pilot Super Sport 245/40-19 26.7 Rolling Diameter
Michelin Pilot Super Sport 275/35-19 26.6 Rolling Diameter
whats he talking about ? wondering if hes gotten confused with all the specs we been talking about.
"You would want to do a +40mm offset at most, a +45mm offset would not be right at all.
The rolling diameter will be the same as the front with this tire size, for optimal fitment this is your best option."
and posted the following specs:
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; R-Disk; 19x9 +32mm Offset
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; O-Disk; 19x10.5 +40mm Offset
Michelin Pilot Super Sport 245/40-19 26.7 Rolling Diameter
Michelin Pilot Super Sport 275/35-19 26.6 Rolling Diameter
whats he talking about ? wondering if hes gotten confused with all the specs we been talking about.

I would stress the +45 in the back, on a 10.5" +40 you'll be out there, a +45 will allow you to run wider rubber, a +40 will limit you to a 275 IMO (or a risky 285).
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From: Houston, Tx
I emailed my specs off to the shop i'm working with. I got a reply just now and this is what he said.
"You would want to do a +40mm offset at most, a +45mm offset would not be right at all.
The rolling diameter will be the same as the front with this tire size, for optimal fitment this is your best option."
and posted the following specs:
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; R-Disk; 19x9 +32mm Offset
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; O-Disk; 19x10.5 +40mm Offset
Michelin Pilot Super Sport 245/40-19 26.7 Rolling Diameter
Michelin Pilot Super Sport 275/35-19 26.6 Rolling Diameter
whats he talking about ? wondering if hes gotten confused with all the specs we been talking about.
"You would want to do a +40mm offset at most, a +45mm offset would not be right at all.
The rolling diameter will be the same as the front with this tire size, for optimal fitment this is your best option."
and posted the following specs:
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; R-Disk; 19x9 +32mm Offset
CV201 19"; 5x114.3; Anodized Polished Full Reverse Barrel; Matted
Silver (MSL) Finish; O-Disk; 19x10.5 +40mm Offset
Michelin Pilot Super Sport 245/40-19 26.7 Rolling Diameter
Michelin Pilot Super Sport 275/35-19 26.6 Rolling Diameter
whats he talking about ? wondering if hes gotten confused with all the specs we been talking about.
Second, a +40 is pushing the wheel further from the inside wheel well and towards the fender. Unless you plan on running some/a lot of camber I would say stick with a +45. Here is my post showing the difference; https://www.myg37.com/forums/3542952-post129.html
Also they are worried about rolling diameter over tire sidewall height. With the 245/40 & 275/35 choices your rear tire sidewall height is shorter than your front. And that will just look funny. This is why I'm running a 245/40 & 285/35. Plus with the 245/40 & 285/35 it doesn't effect your speedometer as much.
Lastly here is the final review of my current set-up; https://www.myg37.com/forums/3666607-post506.html
Everything stated above is spot on. For the rears you definitely want to stick with a +45 offset for the rears especially when you're running Michelin PSS wheels. If you go with a +40, you will probably get a good amount of rubbing even when running a 275 tire because those PSS's run pretty wide since they are real performance tires. Then later on if you ever want to go 285, you will have some serious rubbing issues on the +40 offset. Listen to Robert and blnewt and go with the +45, you will be glad you did especially since you can really enjoy the performance of the car without any worries.
Newt and Robert, I asked in the "will it fit" thread, but figured this is getting more attention these days.
Any idea if a 265/35 will fit the front on a 19/9 +40 lowered on swifts with stock camber? '13 sedan, 6MT.
Thanks
Any idea if a 265/35 will fit the front on a 19/9 +40 lowered on swifts with stock camber? '13 sedan, 6MT.
Thanks
Yes, quite easily too I might add. You could probably push it out another 5-7mm.
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With a +40 for sure! I'm running a 245/40-19x9.5 +35 (via a +40 w/ 5mm spacer) and have no issue. I don't think you'll have any running a 265/35 (or 30)-19x9.0 +40. Do it and let us know!!! This is for a sedan correct?
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First, Congrats on the new wheels! I think the overall look of the wheels looks great on the sedan. Tire sizes are good too. However the OEM offsets are what pushes me away from them. That rear wheel/tire is poking out something crazy!





